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 (React, Node, React Native, Python, Ruby on Rails, 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.
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Min project size
$10,000+
Hourly rate
$25 - $49 / hr
Employees
50 - 249
Locations
Bielsko-Biała, Poland
Year founded
Founded 2005
Languages
Timezones
1 Language that we service
English
1 Timezone that we service
CET
Central European Time (CET)
2 Locations
Bielsko-Biała , Poland
Bielsko-Biała , Poland
No have been added yet...
Pricing Snapshot
Min. project size
$10,000+
Avg. hourly rate
$25 - $49
/hr
Rating for cost
4.5
/5
What Clients Have Said
Selleo offers competitive pricing with clients noting strong value for cost. Projects ranged from $20,000 to over $600,000, depending on scope and duration. Clients praised their quality and responsiveness, indicating a good return on investment.
While generally praised, some clients have reported issues with Selleo's ability to meet deadlines and maintain quality standards consistently, leading to project delays and subpar deliverables.
High-Quality UX/UI Design
Selleo is recognized for its high-quality UX/UI design. Clients appreciate the aesthetic and functional design solutions that enhance user experience, with some projects receiving high ratings and positive user feedback.
Effective Problem-Solving and Innovation
Selleo is commended for their problem-solving capabilities and innovative approaches. Clients value their ability to address complex challenges and provide insightful solutions that enhance product development.
Strong Cultural Fit and Team Collaboration
Clients often note Selleo's cultural compatibility and seamless integration with in-house teams. Their collaborative approach and dedication to client success are highlighted as key strengths, making them feel like an extension of the client's team.
High-Quality Code and Development Standards
Clients consistently praise Selleo for delivering high-quality, reliable, and well-documented code. Their adherence to development standards and practices ensures robust and maintainable solutions.
Commitment to Client Success and Business Goals
Selleo demonstrates a strong commitment to understanding and achieving client business goals. Their dedication to delivering solutions that align with client objectives is frequently highlighted in reviews.
Conference Management Platform for Training Company
Web Development
$10,000 to $49,999
Feb. 2014 - Mar. 2015
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"[W]ith Selleo’s professional approach, the work was easy and even enjoyable."
May 23, 2017
Vice Chairman of Advisory Board, Training Company
Anonymous
Verified
Other industries
Warsaw, Poland
1-10 Employees
Online Review
Verified
Selleo developed an event-focused web CMS solution with corresponding mobile apps (iOS, Android, and Windows Phone), incorporating user behavior analytics and feedback features to boost participation.
The completed platform successfully supported over 800 attendees, earning a 4.9 rating in app stores. Selleo’s high-quality designs, friendly demeanor, and responsive communication created an innovative and productive partnership.
The client submitted this review online.
BACKGROUND
We are a foundation which grew out of a web and mobile community, aiming to provide an interactive forum for IT people interested in the unique mixture of networking, knowledge-building, as well as practical and productive skills development. I’m the Vice Chairman of the Advisory Board.
As the host of one of the biggest admittance-free IT events in Europe, we were looking for a multi-platform cloud-based conference management application to mobilize and socialize the conference.
OPPORTUNITY / CHALLENGE
We needed a dedicated event platform and cross-platform mobile solution to help a few hundred participants navigate through the agenda. The app needed to list multiple lectures and workshop, supply the attendees with information about presentations and speakers, and encourage participation and elicit feedback for improvements in the future.
SOLUTION
Our event management platform consists of a custom Ruby on Rails web application, which we used to enter event data and gather and analyze statistics and/or feedback. The web CMS [content management system], which connected with the suite of mobile apps for Android, iOS, and Windows Phone, was fitted with analytical features to track and measure user behavior in the application, gather feedback, and keep the data updated in real time. Selleo was responsible for the development of the whole product, including the web CMS platform and mobile apps.
We were looking for a software development house which could deliver both web and mobile solution under one roof, assisting us with application architecture and design development. Selleo fit our requirements and also presented a portfolio of similar software solutions. We received not only high-quality developers but also domain knowledge regarding data analytics, feedback gathering, and mobile data collection.
We worked closely with Selleo’s team to create the project scope. Having an initial idea of how the platform should look like, we didn’t know much about software development processes. Selleo backed us with the Agile methodology and an understanding of how to transform our ideas into application functionalities. To be honest, we had no proper documentation, just some rough ideas of functionalities. Selleo split these concepts into user stories, and then we co-created the project backlog.
Selleo assigned a varying number of people to the project based on our needs. Most of the time, we had 2 developers. They were responsible for web and mobile. Our project went from February 2014 to March 2015.
RESULTS & FEEDBACK
The solution supported more than 800 users on all mobile systems—iOS, Android, and Windows Phone. We received very positive feedback. The app had a 4.9 score on Google Play. Users were happy with its simple UI and offline mode.
Our idea of developing a web event management system with mobile apps was conceived during a service design workshop that Selleo conducted for us. The system was designed and developed in close collaboration between our organization and Selleo. We felt like they became a unique part of our foundation. They were very responsive and allowed us to overcome some process challenges. Timing was a crucial factor, but Selleo managed to deliver the solutions within our agreed schedule.
Since we had no previous experience in developing software projects, Selleo was a great partner to work with. They presented high-quality project management skills. At first, we thought that conducting software projects would be extremely hard, but with Selleo’s professional approach, the work was easy and even enjoyable.
We really appreciate the way they deliver service and their whole company attitude. They are friendly, open-minded, and focused on the client’s needs. We had a really a great experience with them.
RATINGS
5.0
"I’m pleased to recommend Selleo as a software development partner."
Quality
5.0
Service & Deliverables
Schedule
5.0
On time / deadlines
"They delivered within the schedule, and we launched on time."
Cost
5.0
Value / within estimates
"They are worth the price."
Willing to Refer
5.0
NPS
"The quality of their service and the final web and mobile applications were excellent.
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1 Reviews
Our Story
We are Selleo - a community of self-driven digital experts crafting secure, scalable software across SaaS, EdTech, HRM, fintech, healthcare and e‑commerce. Our team blends Ruby on Rails, React/React Native, Node, Python and mobile expertise with Management 3.0 principles: ownership, proactiveness, respect and teamwork.
Since our Rails origins we’ve grown into a 100+ strong, community‑engaged firm with ISO certifications and award‑winning culture, delivering dozens of successful projects.
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