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    Bielsko-Bała, Poland

150+ projects, 50 devs, result-driven process

4.8
16 reviews
Bronze
VERIFIED

For over ten years Selleo has delivered professional services on more than 150+ software development projects for clients from Europe, the US, Canada, and Australia, designing and building a number of applications throughout a wide spectrum of business domains, industries, and technologies (Ruby on Rails, ReactJS, React Native, EmberJS, Elixir).

Extend your in-house team

Whenever you want to handle a new project, deliver essential features or need a staff with specialized skills or industry expertise, our full-stack developers help you to increase overall productivity. We work in collocated agile teams crafting web and mobile applications with an entrepreneurial sense of ownership.

Embrace tech stack complexity 

Our expert developers have not only the current capabilities you need but also an ability to build new ones rapidly. With the vast diversity of skills required and partnership with other specialized companies, we can deliver even the most technologically challenging software solutions.

Industry Expertise

Through the years we have gathered a broad spectrum of specialization in the development of custom SaaS and cloud-based business process management tools, digital dashboards, LMS and e-learning services, AdTech and marketing platforms, data analytics and processing solutions. We enable clients to efficiently optimize and innovate processes, products, and business ventures by developing single page applications, designing microservices architecture and crafting web and mobile applications.

READ MORE...
 
$25,000+
 
$25 - $49 / hr
 
50 - 249
 Founded
2005
Show all +
Bielsko-Bała, Poland
headquarters
  • Powstańców Śląskich 3
    Bielsko-Bała 43-300
    Poland
other locations
  • Silesian
    Poland

Portfolio

Key clients: 

Agencies

Marketing or software related companies with multiple projects and big brand clients.

Product Companies

SMEs or well-funded startups who augment their in-house teams to reduce development time or need some domain/technology expertise.

SchoolKeep

The SchoolKeep is an innovative learning management system (LMS) that enables organizations to train employees, customers and channel partners. This SaaS platform is aimed to provide tools for creation and distribution of training content and allows its users to build and scale branded training experiences. 

9teams

The 9teams is an enterprise collaboration platform ensuring running the meeting and taking minutes with access to the information and resources required, at any given time. This meeting management software allows users to improve collaboration effectiveness and, with a set of dedicated functionalities, facilitates the way organizations are conducting meetings. (Ruby on Rails, EmberJS)

Simplaex

The Simplaex is a SaaS platform which allows game developers and publishers to create revenue from their current players and acquire new ones. This self-service platform uses the latest personalization technologies to reach players with custom messages and build lasting relationships with them. 

GrantNavigator

The GrantNavigator is a web-based grant management platform which aims to standardize compliance efforts and guide users through the whole grant life cycle. With its intuitive digital dashboards, recipient organizations have real-time one-click access to detailed information and all activities concerning grants

Catalyst

The Catalyst is an internal e-health single page application which aims to provide advanced access to relevant health information, enhance the quality of care, reduce errors and increase collaboration. (Ruby on Rails, ReactJS)

BattleRiff

The Battleriff is an online eSports service which enables players from around the globe to challenge real opponents in popular games such as Smite: Battleground of Gods

Reviews

4.8
16 reviews
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Development for a Startup Incubator

“Selleo holds themselves to a high standard that I’ve rarely seen in agencies.”

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4.5

Quality: 
5.0
Schedule: 
5.0
Cost: 
4.5
Willing to refer: 
4.5
The Project
 
$50,000 to $199,999
 
Aug. 2018 - Ongoing
Project summary: 

Selleo developed a backend and data pipeline using Python to manage an array of data sources from a third-party client’s external system. They also built a React app to host a customer dashboard on mobile.

The Reviewer
 
11-50 Employees
 
Berlin, Germany
Managing Director, WATTx
 
Verified
The Review
Feedback summary: 

Selleo delivered exceptional results that secured client satisfaction. The deliverable they produced was built rapidly and without fault. Collaborative and engaged, they made a marked effort to fully grasp the scope and objectives to achieve the optimal outcomes. 

BACKGROUND

Introduce your business and what you do there.

I’m the managing director at WATTx, a venture startup company. We come up with and invest in startup ideas, build products, and work to get them to market.

OPPORTUNITY / CHALLENGE

What challenge were you trying to address with Selleo?

One of our projects was progressing well and moving quite quickly, but we lacked enough resources. Having completed some research and sketches, we needed to get a product up and running fast. Our client wanted to increase the pace, which required us to scale up our team.

SOLUTION

What was the scope of their involvement?

We had wireframes, sketches, and the business idea prepared. Selleo helped us build a backend where we could integrate our data sources that came from one of our client’s external systems.  Using Python, they helped us create the data pipeline and make it reliable. 

We also needed to develop a dashboard for our customers’ clients. They helped us quickly build a React app. The corresponding desktop application that’s viewable on a mobile device as well. It’s fully reactive. At this point, we’re continuing to the next phase of the project and have also started a new one together. 

What is the team composition? 

Four people from the team worked on our project. The project manager they assigned us was our main point of contact.

How did you come to work with Selleo?

We researched a few different companies and reached out to our network to ask for agency recommendations. One of our employees also had some connections. He used to work with current staff members at Selleo and recommended their company. 

Selleo stood out based on the quality of the projects they had delivered. Their prices were very fair. Some offshore companies have cheaper prices, but also lower quality coders.

How much have you invested with them?

We spent between $50,000–$199,999.

What is the status of this engagement?

We started working together in August 2018, and the work is ongoing.

RESULTS & FEEDBACK

What evidence can you share that demonstrates the impact of the engagement?

Selleo did an exceptional job. Integrations with a corporate system are always a bit of a hassle, and they managed it very well. Of the six developers we’ve met so far, each one has been highly skilled and readily able to understand the goal of our projects.

How did Selleo perform from a project management standpoint?

They dedicated one person to project management. Initially, we were a bit skeptical about the need because we felt we could handle it ourselves. Our head of tech visited their offices for a few days to get them set up on the project and see their style of work. During that time, he met the project manager and thought she performed very well, so we decided to book her for some time. Our tech lead feels we learned much from her.

Our teams established a close integration. We had daily standups and reviews. They got to know the relevant business issues and understood what the project was about. Selleo always clearly communicated with us and we never had any bad surprises. They speak English perfectly. We beat the estimated timeline we set in the beginning. 

What did you find most impressive about them?

They have good quality code, and we like their approach. Selleo holds themselves to a high standard that I’ve rarely seen in agencies. They only deliver projects that are free of software bugs.  The communication between our teams is excellent. 

There were never any surprises because they communicated all the terms and costs. If anything didn’t go well, they openly admitted it. They quickly became part of our team, which helped us a lot.  

Are there any areas they could improve?

Their prices could be lower.

Do you have any advice for potential customers?

If you’re looking for high quality and want a reliable partner, I recommend integrating Selleo into your team. Provide adequate information to help them get deeply involved, and they’ll provide the most value. Their programmers and developers have a lot of experience and can really think for themselves.

If we didn’t specify something clearly, they asked clarifying questions and made useful suggestions. They’ll assign you team members that perform very well, work in sync with your team, and are invested in delivering the project.

4.5
Overall Score The communication and delivery were very good. The whole team is friendly, reactive and responsive. They took ownership for the project.
  • 5.0 Scheduling
    ON TIME / DEADLINES
    We got the project to our client on time. The client was impressed with the work.
  • 4.5 Cost
    Value / within estimates
    They’re not the cheapest, but they deliver good value.
  • 5.0 Quality
    Service & deliverables
    They communicated clearly what they could deliver, followed through, and accurately documented their work. The quality of their code and handoff were great.
  • 4.5 NPS
    Willing to refer
    We were highly satisfied with their work.

Development for a Moving Service

“With Selleo, the entire development process was quite open and lean.”

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4.0

Quality: 
4.0
Schedule: 
5.0
Cost: 
4.0
Willing to refer: 
4.0
The Project
 
$50,000 to $199,999
 
Feb. - July 2017
Project summary: 

Selleo assisted with frontend and backend development for an online moving company’s digital system. They worked with Ruby on Rails and React.js technology to update the backend and make changes to the UI.

The Reviewer
 
201-500 Employees
 
Berlin, Germany
Dennis Gneuss
Chief Digital Officer, Movinga
 
Verified
The Review
Feedback summary: 

Selleo delivered a reliable product that’s still being used today. Compared to past experiences, the team stands out for their involved collaborative skills and seamless workflow. Overall, it was a transparent and productive engagement.

BACKGROUND

Introduce your business and what you do there.

I’m the chief digital officer of Movinga. We’re an online-based company that offers moving services and more to customers in Germany, France, and Sweden. I lead our technical product and design department.

OPPORTUNITY / CHALLENGE

What challenge were you trying to address with Selleo?

We wanted to quickly ramp up our development capabilities and fill some gaps in our system.

SOLUTION

What was the scope of their involvement?

They provided front-and backend development assistance alongside our internal team. We handled the conceptualization process and design elements in-house, and our project manager shared those requirements with the Selleo team. They implemented several UI changes on the frontend, working with Ruby on Rails and React.js. On the backend, the team helped us build logic into the grouping and dispatching system that’s used by internal agents working from desktop devices. They added a module to improve the backend system, which is also built with Ruby on Rails.

What is the team composition?

They assigned a frontend specialist, two developers, and a project manager to the project.

How did you come to work with Selleo?

Some of our internal staff had worked with them in the past, and they had good experiences. Based on that and their initial proposal, we chose to work with them for this project.

How much have you invested with them?

We spent between $50,000–$200,000.

What is the status of this engagement?

This project lasted from February–July 2017.

RESULTS & FEEDBACK

What evidence can you share that demonstrates the impact of the engagement?

They completed the development for the application, and it’s currently in use. We’ve worked with freelancers that weren’t that great in the past, but the collaboration with Selleo was pretty seamless. We didn’t run into any big hiccups because they were so well integrated into our team. We were very happy with their service.

How did Selleo perform from a project management standpoint?

Because he hired them to supplement our internal team, they didn’t have many project management responsibilities. Our team leads were in charge of scoping the work.

What did you find most impressive about them?

When we worked with other vendors, we had to go through several rounds of negotiations and back-and-forth discussions. It was a bit challenging. With Selleo, the entire development process was quite open and lean.

Are there any areas they could improve?

They provided developers from two different teams within their company, two from one team and one from the other. Selleo mentioned that they don’t normally split their resources that way, which I fully understand. They explained that they made an exception for our project because we specifically requested a frontend developer. We appreciated the accommodation, but the situation did create some limitations for us.

Any advice for potential customers?

Anyone considering Selleo should just send them an email.

4.0
Overall Score
  • 5.0 Scheduling
    ON TIME / DEADLINES
  • 4.0 Cost
    Value / within estimates
  • 4.0 Quality
    Service & deliverables
  • 4.0 NPS
    Willing to refer
    It depends on the type of project.

Software Development for Startup Venture Fund

“The products have minimal bugs, and I’m happy with the quality of their work.”

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4.5

Quality: 
4.0
Schedule: 
4.0
Cost: 
3.0
Willing to refer: 
5.0
The Project
 
$200,000 to $999,999
 
Apr. 2017 - Ongoing
Project summary: 

Selleo augments the existing dev team to work on various software projects. They’re currently building two web-based products, focusing on the frontend. They also provide support for the backend developers.

The Reviewer
Product Lead, Venture Fund
 
Verified
The Review
Feedback summary: 

Selleo is organized and communicative, maintaining regular contact to provide project updates. They’re trustworthy and eager to improve. They sometimes need technical guidance, but the team works well and wants to build the best products possible.

BACKGROUND

Introduce your business and what you do there.

I’m the product delivery lead for a venture investment organization. We deliver funding to startups and are also building a number of software and services to support our ambitions in the venture investment space. I work with the delivery teams to make sure our software meets project requirements.

OPPORTUNITY / CHALLENGE

What challenge were you trying to address with Selleo?

We needed a robust and sizable partner to augment our pre-existing dev team and work on various software projects and products.

SOLUTION

What was the scope of their involvement?

Right now, Selleo is building two web-based products. They use React to work on frontend development, and they also support our tech team who’s building the backend in Ruby on Rails.

What is the team composition?

They provide four full-time developers.

How did you come to work with Selleo?

We found them online. We narrowed it down to three firms, but Selleo had the best approach and was friendly, too. They were willing to discuss the project and make sure we all understood one another, so we hired them.

How much have you invested with them?

We’ve spent about £220,000 (approximately $279,880 USD).

What is the status of this engagement?

We’ve been partners since April 2017, and the work is ongoing.

RESULTS & FEEDBACK

What evidence can you share that demonstrates the impact of the engagement?

The products have minimal bugs, and I’m happy with the quality of their work.

How did Selleo perform from a project management standpoint?

We have weekly stand-up meetings to set expectations and go over progress. Even though they’re remote, they’ve engaged well with the project and have good communication. We use Google Meet and Trello to keep in touch.

What did you find most impressive about them?

They’re trustworthy and want the best for our organization. They’re eager for feedback and take it seriously, changing their workflow to meet expectations.

Are there any areas they could improve?

They sometimes need more oversight when it comes to implementing certain technology solutions.

Do you have any advice for future clients of theirs?

Treat them as part of your team and have regular communication. They work quickly, so make sure you have enough work to keep them busy.

4.5
Overall Score They’re a good addition to our team.
  • 4.0 Scheduling
    ON TIME / DEADLINES
    They communicate and set expectations well.
  • 3.0 Cost
    Value / within estimates
    They’re more cost effective than hiring individual developers.
  • 4.0 Quality
    Service & deliverables
    There’ve been a few bugs, but not too many.
  • 5.0 NPS
    Willing to refer
    I’d recommend them; they help get ideas off the ground quickly.

Web Development for VPN Service Provider

“Selleo is profoundly talented in the Ruby on Rails area.”

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5.0

Quality: 
5.0
Schedule: 
n/a
Cost: 
4.0
Willing to refer: 
5.0
The Project
 
Confidential
 
Jan. 2017 - July 2018
Project summary: 

Selleo provided development staff augmentation to help increase a VPN service provider’s pace and meet target deadlines. Based on a code review, they gave input and made updates to enhance the UX of the API.

The Reviewer
 
11-50 Employees
 
Berlin, Germany
Jörn Stampehl
CTO, ZenGuard
 
Verified
The Review
Feedback summary: 

Selleo offered insightful and actionable suggestions to enhance the website’s UX and overall quality. Drawing from an extensive knowledge base, the developers programmed clean, high caliber code. Pleasant, skilled, and accommodating, the team maintained a responsive and open dialogue.

BACKGROUND

Introduce your business and what you do there.

I’m the CTO and managing director of ZenGuard, a VPN service provider. Subscribing for a VPN on our website grants users the ability to connect to different locations in about 30 different countries. Once a user logs in, we provide full encryption for total web traffic.

OPPORTUNITY / CHALLENGE

What challenge were you trying to address with Selleo?

We had a shortage of resources, and It’s hard to find qualified developers in Berlin. Having worked with Selleo before, I knew they were fully capable of collaborating with our existing team. We needed them to look through our current code base and find methods to restructure and optimize it while fixing bugs they found along the way.  

SOLUTION

What was the scope of their involvement?

We hired Selleo as full-time developers. The team conducted an autonomous assessment of the existing code and proposed improvements. They enhanced the existing API to give users a better experience. Their involvement in several projects with our onsite team helped reach our timeline goals. 

All of the improvements Selleo made were on the coding side. They not only pinpointed areas that needed work but also implemented those updates. They worked onsite with our engineers on new development projects, as well.

What is the team composition? 

One of the developers from Selleo worked with us on a full-time basis. A more senior developer supported their work as a part-time resource.  He worked as a steering partner. After they discussed several issues, they recapped the takeaways with us to highlight what they felt we should improve.

How did you come to work with Selleo?

I had a great experience working with Selleo while employed at a different company, so I reached out to request help with this resource shortage. Sello is profoundly talented in the Ruby on Rails area.

What is the status of this engagement?

We worked together from January 2017–July 2018.

RESULTS & FEEDBACK

What evidence can you share that demonstrates the impact of the engagement?

Selleo wrote a very good quality of code. We were in close contact with the team’s management. If there were ever a problem, their managers would have been notified immediately. Luckily, no issues ever occurred. We were very satisfied with them.

How did Selleo perform from a project management standpoint?

We mostly managed Selleo’s resources internally. They made suggestions and waited for us to instruct them whether or not to instate them. Our communication was very direct. We used Slack.

They also took part in the weekly planning meeting via telephone conferences. Two or three times, they visited our office in Berlin to get to know the rest of our team and bond with them. They were directly bound to the project’s deadlines. 

What did you find most impressive about them?

Selleo has extensive knowledge of Ruby on Rails. They always assign a senior employee to consult their team during a project.

Are there any areas they could improve?

No. 

Do you have any advice for potential customers?

Bringing Selleo on site once or twice is very beneficial and allows them to meet the rest of your team. Maintain direct communication with them daily so that nothing gets lost in translation.

5.0
Overall Score I would work with them again.
  • N/A Scheduling
    ON TIME / DEADLINES
  • 4.0 Cost
    Value / within estimates
    They’re not the cheapest, but they offer a lot of value for your money.
  • 5.0 Quality
    Service & deliverables
    They are very knowledgeable. The quality of their work is also quite good.
  • 5.0 NPS
    Willing to refer
    They’re a team of really friendly people who are easy to talk to. It’s a pleasure to work with them. They provide a great service.

Frontend UI Dev for AdTech Firm

“They outperformed any other contractor we’ve worked with.”

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5.0

Quality: 
4.5
Schedule: 
4.5
Cost: 
5.0
Willing to refer: 
4.5
The Project
 
$50,000 to $199,999
 
2017 - 2018
Project summary: 

Selleo built the frontend UI in Triangular.js for an AdTech company. Working off of provided wireframes and designs, they augmented the in-house team and resolved architectural, CSS, and algorithmic issues.

The Reviewer
 
11-50 Employees
 
Berlin, Germany
Technical Product Manager, AdTech Firm
 
Verified
The Review
Feedback summary: 

Without Selleo’s support, the frontend UI would not exist. The functionality they implemented is reliable and communication throughout the collaboration was good. Though they worked remotely, their dedication matched that of the in-house team.

BACKGROUND

Introduce your business and what you do there.

We are a company in the AdTech space. I am the technical product manager leading the frontend and backend development.

OPPORTUNITY / CHALLENGE

What challenge were you trying to address with Selleo?

Selleo worked with us as a contractor for some of our frontend development needs.

SOLUTION

What was the scope of their involvement?

They collaborated with our in-house developers and built the frontend user interface for one of our products. The UI is built on Angular.js and was based on wireframes and designs we provided. The UI was based on our wireframes and design, to which Selleo suggested improvements throughout the development process.

We ran most of the project management on our side, while they operated as an external workforce. A junior developer concentrated on design-related tasks and CSS, while a senior developer worked on architectural and algorithmic problems.

What is the team composition?

We worked mostly with the two developers.

How did you come to work with Selleo?

The collaboration started before I joined the company. To my knowledge, we hired them for two previous contracts before this one.

How much have you invested with them?

The total spend was between 50,000 €–150,000 € (approximately $58,000–$174,000 USD).

What is the status of this engagement?

When I joined the company in February 2018, the project was already underway. We completed everything by August 2018, but will reach out to them again for future frontend projects.

RESULTS & FEEDBACK

What evidence can you share that demonstrates the impact of the engagement?

We wouldn't have a working frontend without them. The functionality and reliability of their work is solid. As with any agile development process, we identified bugs regularly and prioritized to solve the most significant ones.

How did Selleo perform from a project management standpoint?

Communication was smooth; most of our interactions were via Slack, Jira, and Google Sheets. We had daily meetings to coordinate the project and monthly retrospectives, in which we raised our concerns and found ways to collaborate more effectively.

What did you find most impressive about them?

Even though they were a remote contractor, they worked as if they were part of the in-house team. They outperformed any other contractor we’ve worked with, and their communication, dedication, and quality of work is second to none.

Are there any areas they could improve?

I can't think of any areas they should improve; they did a good job.

Do you have any advice for potential customers?

We used them primarily as an extension of our staff, but I know they do ad hoc projects as well. If you’re hiring them as an external workforce, communicate with them as much as possible to ensure your expectations align with their understanding of the project.

5.0
Overall Score
  • 4.5 Scheduling
    ON TIME / DEADLINES
  • 5.0 Cost
    Value / within estimates
  • 4.5 Quality
    Service & deliverables
  • 4.5 NPS
    Willing to refer

Web Development for Business Consultancy

“They’re interested in our feedback, proactively finding ways to improve.”

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4.5

Quality: 
4.0
Schedule: 
4.5
Cost: 
4.0
Willing to refer: 
4.5
The Project
 
Confidential
 
May 2016 - Ongoing
Project summary: 

Joining the internal team, Selleo writes and reviews code, and provides suggestions that guide the product’s technical architecture, implementation strategies, and development processes on an ongoing basis.

The Reviewer
 
51-200 Employees
 
Berlin, Germany
CTO, International Business Consultancy
 
Verified
The Review
Feedback summary: 

As a central selling point, the product attracts new clients and increases sales. Selleo seamlessly joined the in-house workflow, staying up to date with a variety of management tools and communicating consistently. Overall, their team is knowledgeable, responsive, and committed to the project.

BACKGROUND

Please describe your company and your position there.

I’m the CTO of an international business consultancy. I lead the development, technical project, and product teams.

OPPORTUNITY / CHALLENGE

For what projects/services did your company hire Selleo?

To accelerate and improve the development of our core product, we needed to scale up our team.

What were your goals for this project?

We wanted a high-quality product, with regular and mapped updates, implemented and managed using agile development processes.

SOLUTION

How did you select this vendor?

We chose to work with Selleo based on the cost, efficiency, and quality that they offered.

Can you go into detail about the services they provided and the scope of the project?

Their developers not only provide basic coding services, but they also participate in code reviews and offer feedback. We collaborate to define the best strategies for our product’s technical architecture, implementation plans, and development processes. The team’s suggestions are extremely valuable, making them a cornerstone of our product development.

They’ve taken on more tasks and responsibilities, building off of their initial coding role.

What was the team composition?

There are usually between 15–20 developers working on the product at any time. About 50% work on the frontend, and the other 50% focus on the backend. While the teams are restructured occasionally to accommodate our needs, the total number of resources is relatively constant.

RESULTS & FEEDBACK

Can you share any information that demonstrates the impact that this project has had on your business?

The finished product is currently a major selling point for our company. As a central element in the grand scheme of our services, it has swayed many clients in our direction and boosted sales. Additionally, it is regularly used both internally and externally.

How was project management arranged and how effective was it?

They joined our internal management process. At the direction of our product owner, scrum master, and QA team, the Selleo team communicates consistently and uses tools like GitHub, Slack, Jira, Confluence, and Trello to stay up to date with the project. We’ve never encountered a language barrier; all interactions and documents are done in English. They’re interested in our feedback, proactively finding ways to improve.

What did you find most impressive about this company?

Their talented developers don’t see this as just a simple project; it’s clear that they care about our success. This attitude is something money can’t buy, so I appreciate this level of dedication.

Additionally, their developers have a wide range of interests, extending their knowledge to improve different elements of my business.

Are there any areas where they can improve?

We run into minimal issues. The invoicing process is not as smooth as it could be.

4.5
Overall Score
  • 4.5 Scheduling
    ON TIME / DEADLINES
  • 4.0 Cost
    Value / within estimates
  • 4.0 Quality
    Service & deliverables
  • 4.5 NPS
    Willing to refer

SaaS Dev. for a Software Provider

“We can now ship our products faster and demonstrate our ability to execute quickly.”

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4.5

Quality: 
4.0
Schedule: 
5.0
Cost: 
4.0
Willing to refer: 
4.0
The Project
 
$50,000 to $199,999
 
June 2017 - Ongoing
Project summary: 

Selleo provided expertise on improving the framework for a SaaS solution. This included providing insight on API and UI.

The Reviewer
 
11-50 Employees
 
Germany
Manuel Reil
CTO, Alyne
 
Verified
The Review
Feedback summary: 

Their team worked diligently to provide a solution that runs effectively. They produced a result that followed the specifics of a complex project.

BACKGROUND

Please describe your company and your position there.

I am the CTO of Alyne, an organization that offers risk insight capabilities through SaaS.

OPPORTUNITY / CHALLENGE

For what projects/services did your company hire Selleo?

We wanted software development expertise on improving the flexibility of the frameworks we use for our products. We wanted a SaaS solution that makes it easier for our customers to manage their risks

What were your goals for this project?

We wanted to augment our team, speed up the development process, and transfer knowledge.

SOLUTION

How did you select this vendor?

We met at a developer workshop and kept in contact since.

Can you go into detail about the services they provided and the scope of the project?

Selleo is developing features for our SaaS product. They are focusing mainly on the UI, but also help with API.

What was the team composition?

We work with a single development lead and two additional developers.

RESULTS & FEEDBACK

Can you share any information that demonstrates the impact that this project has had on your business?

We were able to ship features faster and demonstrate our ability to execute.

How was project management arranged and how effective was it?

Overall effective and well governed

What did you find most impressive about this company?

The passion they put in their daily work, their up-to-dateness of their skills

Are there any areas where they can improve?

Our SaaS solution makes it easier for our customers to manage their risks. But developers must understand this complex topic. Selleo could improve their knowledge there a bit, but this also something we at Alyne could improve more, i.e. transfer knowledge.

4.5
Overall Score
  • 5.0 Scheduling
    ON TIME / DEADLINES
  • 4.0 Cost
    Value / within estimates
  • 4.0 Quality
    Service & deliverables
  • 4.0 NPS
    Willing to refer

Software and Web Development for Employment Platform

“We’re really happy to give them free rein to follow their instincts when solving things.”

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5.0

Quality: 
5.0
Schedule: 
5.0
Cost: 
4.0
Willing to refer: 
5.0
The Project
 
$200,000 to $999,999
 
Dec. 2016 - Ongoing
Project summary: 

Selleo worked on the development of a web application, building the platform’s second version from scratch. The work used Ruby on Rails and React for the frontend, as well as HTML, CSS, and JavaScript.

The Reviewer
 
51-200 Employees
 
Göteborg, Sweden
Henrik Lindberg
CTO, Studentvikarie
 
Verified
The Review
Feedback summary: 

The team works hard, writing good code and completing all work punctually and to a high standard.  They are able to work on their own initiative and take responsibility for their tasks. They use Pivotal and GitHub to manage the project effectively, and communicate through Slack and daily stand-ups.

BACKGROUND

Introduce your business and what you do there.

I am the CTO [chief technology officer] of a small Swedish company called Studentvikarie. We’re a substitute service for schools that finds substitute teachers via a digital platform.

OPPORTUNITY / CHALLENGE

What challenge were you trying to address with Selleo?

It’s hard to hire programmers in Sweden right now. We needed to find good, near shore developers to help us build our platform.

SOLUTION

What was the scope of their involvement? 

They helped us build our digital platform and began the re-write from scratch. The web application uses HTML, CSS, JavaScript, and React, which is backed up by a Ruby on Rails web service layer on top of a MongoDB. They do the full stack development, including the data modeling and service API development, and support our team with constant development. We don’t really think of them as an outside shop as they are part of the daily grind.

We have a designer in-house who lays out the main foundation of the graphical design, but she doesn’t do it all. They use their good judgment to build something that looks and work well. In terms of technical design, they involved in the early days when we started to migrate to Ruby on Rails platform. They have since helped us to make some architectural decisions. We recently integrated GraphQL, which was their initiative.

What is the team composition?

We currently have 2 members of their team assigned to our work full-time. At the peak, we had 4 or 5 of them working for us.

How did you come to work with Selleo?

I don’t know, but right now, I am really happy with what they do and how we work together. I am really keen on keeping them.

How much have you invested in them?

We have spent approximately $250,000.

What is the status of this engagement?

We began working with them in December 2016 and the work is ongoing.

RESULTS & FEEDBACK

What evidence can you share that demonstrates the impact of the engagement?

I’m really happy working with them. We are a fairly young company and still in the exploration phase, meaning that we move fast and do a lot of lean product development. We are still in the startup phase in some aspects. We’re really happy to give them free rein to follow their instincts when solving things. They are very much on the same page as us when it comes to requirements and we feel like they are within our team. They have very good judgment and the things they have built come back well executed. They have surprised us in terms of code quality or breakages. I feel like I can trust them as I can my own team, which is important to me.

They’re good developers, which is a baseline minimum that I want with anyone I am working with, but they are also compatible from a cultural point of view. They take a lot of responsibility — you can leave an open request to them and they will come back and ask questions if they need to. I have not had them come back with a wrong solution, nor have they made a bad call on anything, so I feel we’re very much aligned.

How did Selleo perform from a project management standpoint?

They perform well. I’ve never had to push them or make them work faster in any way. I believe they do exactly what I expect them to do, and there are no surprises, which is what we look for in a team.

We track work in Pivotal for issue management and tracking, as well as GitHub. There is never a problem with the level of requirements set. If there are any questions, they will ask. Most of our communication is through Slack, which we have a daily buzzer on. We also have daily stand-ups since we’re in different geographical locations.

What did you find most impressive about them?

They are very sympathetic to work with. For example, we have a process where we do code reviews internally. We have a lot of young developers here in our local office and have a senior person on Selleo’s team who is really appreciated by our members. In doing reviews, he has a high level of integrity and makes sure to not put anything through that shouldn’t go through. He is also super constructive and helpful in giving feedback. They are really easy to work with and never complain.

Are there any areas they could improve?

I had a team member replaced, which was unexpected to me. It was slightly annoying as we had started to build the team. It was a one-time thing and having worked with both people, I know they switched because one got the opportunity to work on a piece of technology he really wanted to work with, and from a personal level, I am fine with that.

5.0
Overall Score They are easy to work with and do what I want them to do without surprises.
  • 5.0 Scheduling
    ON TIME / DEADLINES
    They do very timely work and do it without surprises.
  • 4.0 Cost
    Value / within estimates
    They were inexpensive but have since increased their prices a bit.
  • 5.0 Quality
    Service & deliverables
    They developed good code and were easy to work with. I couldn’t ask for anything more.
  • 5.0 NPS
    Willing to refer
    Without a doubt. I would absolutely recommend them to any software shops that I know.

Mobile App Development for Greeting Card Company

“They have a great deal of empathy for what we’re trying to accomplish and for a startup, that’s important.”

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5.0

Quality: 
5.0
Schedule: 
5.0
Cost: 
5.0
Willing to refer: 
5.0
The Project
 
$10,000 to $49,999
 
May 2017 - Ongoing
Project summary: 

Selleo developed an iOS and Android mobile app using Apache Cordova. They used an existing backend infrastructure using Ruby on Rails, and offered additional security for the app's use in financial services.

The Reviewer
 
1-10 Employees
 
Harrogate, United Kingdom
Peter Lancaster
CEO, Documobi
 
Verified
The Review
Feedback summary: 

They continue to take on innovative projects and produce unprecedented results. Flexible and responsive, Selleo performs a myriad of services by utilizing internal resources when needed. Their communicative approach to project expectations fosters mutual trust.

BACKGROUND

Introduce your business and what you do there.

I’m the CEO of Documobi. We’re a SaaS company that provides consumers the technology to send messages by embedding user-generated content (video, audio, social) into digital and printed media.

OPPORTUNITY / CHALLENGE

What challenge were you trying to address with Selleo?

We wanted to transition from in-house developers to an outsourced environment in order to maintain, build, and grow our platform. Specifically, we needed developers with sufficient flexibility and experience with Ruby on Rails.

SOLUTION

What was the scope of their involvement?

Initially, there was the process of familiarizing them with the technology we had built and where we were trying to take it. They stabilized the platform’s backend infrastructure using Rails and developed the mobile application for iOS and Android, using Apache Cordova. Additionally, they were helpful in securing the app’s data so it could be used by banking and financial services.

What is the team composition?

The Rails developer is our main point of contact. Depending on the scope of the development sprint, he’ll bring in internal resources with the skill-set needed.

How did you come to work with Selleo?

Our COO did a global search for potential partners that met our needs. We’re a small company so that eliminated most big vendors from the conversation. We narrowed it down to 3 companies and interviewed them. Selleo had Rails expertise and the capacity to perform occasional graphic design and DevOps. They were the right fit from every angle.

How much have you invested with them?

We spent $20,000–$25,000.

What is the status of this engagement?

The engagement began in May 2017 and is ongoing.

RESULTS & FEEDBACK

What evidence can you share that demonstrates the impact of the engagement?

I can say anecdotally, I’ve asked them to complete projects that are new to the whole world and they’ve always managed to do it. Capability and responsiveness make them cost-effective partners. If I had more money to spend, I’d spend it with them.

How did Selleo perform from a project management standpoint?

I rely on them heavily from a project management standpoint. They follow up with us after every scrum session and help me manage the Trello board. If they miss a deadline, it’s usually because I changed something at the last minute. They’re good at communicating and careful when setting expectations. If I say something is urgent, they approach the situation like it’s urgent. It’s important to have trust between partners, and they’re open enough for that to cultivate.

What did you find most impressive about them?

They’re almost as excited about the projects as I am. They have a great deal of empathy for what we’re trying to accomplish and for a startup, that’s important.

Are there any areas they could improve?

I don’t have any improvements to recommend. I only hope they don’t grow too quickly and lose their personable demeanor.

Do you have any advice for potential customers?

I’d advise customers to communicate project specifics effectively and try to establish trust.

5.0
Overall Score
  • 5.0 Scheduling
    ON TIME / DEADLINES
  • 5.0 Cost
    Value / within estimates
  • 5.0 Quality
    Service & deliverables
    The quality of work has been excellent.
  • 5.0 NPS
    Willing to refer

Web App for Health Services Company

“I’ve been quite impressed with Selleo’s work — they built a beautiful product with outstanding code.”

See More

5.0

Quality: 
5.0
Schedule: 
5.0
Cost: 
5.0
Willing to refer: 
5.0
The Project
 
Confidential
 
Dec. 2015 - Jun. 2017
Project summary: 

Selleo is developing a communication app that allows doctors to collaborate on cardiovascular cases while following HIPAA standards. The team continues to test and optimize the app, except for the iOS version.

The Reviewer
 
201 - 500 Employees
 
New Jersey
Senior Software Engineer, Hospital & Healthcare Company
 
Verified
The Review
Feedback summary: 

Selleo’s resources are committed to excellence, which makes them willing to refine features until they have the best product possible. Selleo’s other strengths include Agile project management, excellent English communication skills, and consistent professionalism.

BACKGROUND

Introduce your business and what you do there.

I was the lead for our project with Selleo. We are building an online collaboration tool for the healthcare industry. Our app would allow doctors to communicate with each other regarding cardiovascular issues. The product is compliant with HIPAA [Health Insurance Portability and Accountability Act of 1996], with all protected health information being kept safe and secure.

Our main product is for reporting, while the one at hand is a supplemental communication tool. This collaboration app contains multiple pieces. Its main features are chat rooms that are created between doctors wanting to collaborate on a particular finding from a report, like a cardio issue that requires the input of peers. Users can launch the app from within the reporting tool, share their screens, have phone conferences, take pictures of their desktop, and attach images. 

OPPORTUNITY / CHALLENGE

What challenge were you trying to address with Selleo?

When I came in, the project was in its infancy, with a proof-of-concept approach. We needed to go through the process of making it HIPAA-compliant and getting it ready for production. The app also went through several iterations and name changes.

I have not been very lucky with international development teams at this point, especially ones from India and other non-English-speaking countries.

SOLUTION

What was the scope of their involvement?

The app is a cloud-based solution with a lot of technology involved, including web sockets and WebRTC implementation. Selleo built our application using the latest technology, including Ruby on Rails with a React app. They made sure that we have full test coverage in place for the Ruby code. Selleo also assisted us in setting up the app on Amazon Web Services. Currently, we only need to fix minor bugs that come up. Selleo has also been open to helping in areas like documentation and building a user guide.

Our product required an iOS app since Safari does not support some of the functionalities we needed, namely the WebRTC component for screen and video-stream sharing. We also needed push notification capabilities, which are also not available on Safari for iOS. Another company built a native app based on the one created by Selleo, which added those functionalities. Selleo recommended a developer to us, but we also checked others.

How did you come to work with Selleo?

They had already been selected when I took the project over from our side. Selleo did a great job with the transition.  

What is the status of this engagement?

We started working with Selleo around a year and a half ago. We’re currently in the maintenance and verification phase, so we’ve gone down from 5 developers to 2, currently.

RESULTS & FEEDBACK

Could you share any evidence that would demonstrate the productivity, quality of work, or the impact of the engagement?

I’ve been quite impressed with Selleo’s work — they built a beautiful product with outstanding code. From what I’ve been hearing, the app has received a lot of accolades from the industry during conference demos. Selleo takes care of any issues along the way. They are constantly striving to use the latest technology, and the designers followed good standards.

How did Selleo perform from a project management standpoint?

For a project of this magnitude, things are going smoothly from a development and management perspective. Our company follows the Agile approach, with daily stand-ups and updates. As part of the standard process, we have 2-week sprints, retrospectives, sprint planning, and reviews. Selleo’s people are familiar with all these steps.

Selleo’s team is professional, and they follow our timelines. They’ve put together the resources necessary, changing specialists as needed. For example, they reassigned people when we moved away from design work towards backend coding.

What did you find most impressive about Selleo?

I’ve usually struggled with making sure that international teams understood requirements, especially ones outside of English-speaking regions. Many times, the wrong thing is built or not enough questions are asked. I’ve not seen this at all with Selleo, even though the team is based in Poland. The majority speaks English well, and they would tell me if I’m speaking too fast or if something isn’t clear. This is valuable for us since communication is key in dealing with different time frames.

Are there any areas Selleo could improve?

Towards the end of the project, it would have been better to look at allocated resources sooner. There aren’t too many indications on our side that Selleo is winding it up, though.

Some of Selleo’s developers are very ambitious, which may be more of a positive than a negative. By this, I mean that they want to fix the product and code in order to have the highest-quality product. They are constantly trying to add more tickets for refactoring, which may push out time to delivery. While that’s a good thing, there’s a need to balance getting the best version out while maintaining the delivery cost and getting the tool into customers’ hands. From a consulting point of view, I can see that Selleo would want to keep our project going.

What tips or recommendations could you share that might increase the likelihood of success with Selleo?

The company is a good choice for anyone looking for an alternative to a U.S.-based solution, at a lower price, if they’re willing to deal with the distance and language barrier. Selleo is essentially a frontend Ruby on Rails and JavaScript shop, not a place where someone could build an iOS app. Selleo recommended another company that could do that. We appreciated them not attempting to do something they are not capable of.

5.0
Overall Score
  • 5.0 Scheduling
    ON TIME / DEADLINES
    Selleo pretty much hits all the timelines we put out there.
  • 5.0 Cost
    Value / within estimates
    I found their pricing to be good compared to a U.S.-based solution.
  • 5.0 Quality
    Service & deliverables
    They deliver some of the highest-quality code I’ve seen, and I’ve been doing this for a long time. The workmanship is outstanding in terms of code and test coverage.
  • 5.0 NPS
    Willing to refer
    If any other work comes up, I will definitely be reaching out to Selleo.
Verification

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Verification Level
Bronze
VERIFIED
Business Entity
Status
Active
Jurisdiction of Formation
Poland
ID
0000452102
Date of Formation
Dec 13, 2005
Last Updated
Jan 30, 2019
Client Reviews
VERIFIED CLIENT REVIEWS
16
OVERALL REVIEW RATING
4.8
Source
Clutch
LAST UPDATED
January 18, 2019