Top Staff Augmentation Services in London

Web Services, Software, & API Dev for Business Scaler Co

Vention team's attention to detail, commitment to deadlines, and proactive communication ensured smooth collaboration and high-quality output.

Salesforce & QA Staff Aug Services for Caregiver Org

Despite not being direct employees, they have developed a deep understanding of our business and processes. This knowledge allows them to actively contribute during story grooming sessions, offering valuable suggestions to improve outcomes and ensuring the work aligns with our business goals.

IT Staff Augmentation for Remote Access Solutions Co

Any issues have been discussed proactively and resolved well. The account management has been great. Proactively seeking out any issues to be addressed, and providing the right people quickly when needed.

UI/UX Design & Custom Dev for Rail Health Solutions Firm

iTechArt Group is good at identifying minor issues before they become big, so the project management has been excellent.

Design & Product Improvement for Healthcare Marketplace

They were very engaging and proactively listening for feedbacks and improve ways of working. They were willing to accommodate our working hours and actively involve in company events.

Web-Based UX/UI Design Services for Engineering Company

The project management was highly professional and extremely structured. Transparent plans were drawn up and metrics were used each week to show progress and risks. Whenever there was a change to the plan, sometimes at very short notice, maximum effort was put into realizing the plan.

Enterprise App Modernization for CX Solutions Company

PM was very professional and well maintained. Goals and timelines were set and understood clearly. On most tasks and epics - where there were no external blockers during development and testing - they were able to deliver on time and even exceeded our estimates.

Custom LMS Dev, DevOps & QA for EdTech Co

The professional way everyone at instinctools shows when working with them – from the account management to the engineers we work with. The company proactively asks how they can support our efforts and provide ideas how to help us with very good candidates with expertise that either we requested or that instinctools identified to be missing.

QA Services for Software Company

They were very autonomous, proactive, professional, and always open to help. A significant amount of customer-impacting bugs were caught by the teams prior to release.

Mobile DevOps Support for IT Firm

The work is ongoing, but we’ve received constant positive feedback from our customer about *instinctools’ professionalism. We are happy with the quality of *instinctools’ work.

IT Staff Aug for Property Finance Company

Access to talented and committed people. Their engineers are excellent, and I have worked with some of them across 2 companies, and for many years. The unwavering commitment to continue to do the best for their clients, even when Russia attacked Ukraine, and the resilience to work under stressful and uncertain conditions - often working late to make up lost hours - was incredible.

Staff Augmentation for Financial Services Company

ONHIRES displayed exceptional project management throughout the engagement. They consistently delivered items on time, adhering to project timelines and milestones. Their proactive approach in understanding our specific needs and responding promptly to our requirements ensured a smooth and successful project execution.

Employer-of-Record Services for Equipment Manufacturing Co

Their ability to meet and exceed our needs in a timely manner is outstanding. Their outlook on how best to care for a team located across the globe.

Web Development Staff Augmentation for Online Platform

The Scalers has delivered a much faster delivery of new features, quick onboarding, and a steady stream of new work. The Scalers has delivered well within the agreed timelines. We communicate via virtual meetings, emails, and messaging apps.

Staff Augmentation for AI-Based Social Media Listening Tool

They spent a few months with us scaling up the product and we met all the envisaged deadlines. I can be grateful for their diligence, hard work, quality, and speed.

App & Web Development for Resorts & Entertainment Company

We appreciate their ability to deliver quality work on a timely basis.

Customer Communication Platform Dev for Startup

As a result, the platform was launched on time and within our budget. I didn't expect that kind of involvement from a third-party software development company.

Development for Drum & Music Application

The application was completed to the client's standards within the discussed timeframe and budget. The project was done on time and within the budget constraints.

Mobile Implementation for Online SEO Tool

They covered the agreed scope, were on schedule, and stayed within budget.

Generative AI MVP Development & Integration for SaaS Company

Engaged proactively, succinctly, and confidently. Delivered on time and in fact surpassed expectation. Journi responded efficiently to our needs, whilst at times, enlightening us as to what some of our needs were!

AI Development Services for Healthcare Company

They combined scientific rigor with speed. Their team knew how to select and adapt existing LLMs efficiently (including Hugging Face ecosystems) instead of overbuilding, and they were pragmatic about when a custom model is truly needed. Also, their internal frameworks and methodologies were surprisingly mature for a small company, and they worked extremely well.

AI Model & Data Pipeline Development for Healthcare Startup

Infinity Technologies ran delivery with clear governance and a predictable cadence: weekly planning, transparent backlog, and structured risk management. They balanced startup urgency with R&D discipline hypotheses, experiments, evaluation criteria, and evidence-based decisions. That combination kept us fast and credible.

Custom Software Development for Live Entertainment Platform

Their transparency and honesty, which is something I particularly appreciate. Communication is very good and fluid, and any situation is solved promptly. They're a partner you can rely on.

Staff Aug & Mobile App Dev for Consulting & Outsourcing Co

Nice people. Their friendly communication was most impressive. Excellent values.

IT Staff Augmentation for Digital Services Company

Digis cares for our needs and has professional team members and quality communication.

IT Staff Aug & Software Dev for EdTech Company

The work quality, communication skills, and straightforward approach make them an incredibly dependable company you can count on.

Web & Mobile App Dev for Communication Software Co

Communication is excellent, and we've never encountered any issues in our two years of partnership. Overall, they provided the best agency experience we've had to date. Highly recommended.

UI/UX & Website Design for Blockchain Technology Platform

What we found most impressive about this company was the exceptional quality of their work and the expertise of their team. They demonstrated a deep understanding of our needs and goals, delivering solutions that surpassed our expectations. Their attention to detail, creativity, and ability to translate our vision into tangible results set them apart from others.

Web Design for Micro-Mobility Company

Their approach to design, development, and project management were impeccable. They delivered outstanding performance and great out-of-the-box ideas that exceeded our expectations in each field.

Branding & UI/UX Design for Live-Video Speed Dating Platform

Halo Lab was amazing. We've had feedback from users, investors, and employees, and everyone has said Halo Lab did a fantastic job with the branding, user flows, and UI/UX design. Book twice-weekly calls and let Halo Lab have some reign of creativity to bring your brand to life.

Web Design & Dev for Online Software Development Platform

Halo Lab was very collaborative; it was great interacting with their team. They were a very warm group of people, and they were very involved in the process. They also had great creative ideas.

Design & Development for Website Builder Software Startup

Halo stands out through their designs, which are beautiful. Incorporating them in our app elevates the perception of our product. Moreover, their resources are creative. My co-founder and I don’t necessarily have the most concrete idea of how the product should work or what it should look like. We simply give the team our best rough idea, and they run with it. They’ve pleasantly surprised us in ways we never imagine.

Mobile App Design & Dev for Party Hosting Co

TekRevol has done an amazing job so far. With our growing expansion in the Middle East, they’ve been instrumental in solving crashes, doing design fixes, or implementing user feedback. In addition, the team is great at implementing new features. Adeen is very communicative, informative, helpful, and responsive to my inquiries.

Game Development, Design & Animation for Mobile Gaming Firm

Working with them has been fantastic. They took ownership when issues were on them and were patient and helpful when we had issues on ours. The spirit of 'Let’s make it happen!' is impressive.

Website & Video Module Development for 2D Animation Co

They’re pros at attention to detail. Throughout the process, we have had a lot of discussions. It’s always helpful to have Abeer guiding me and leading brainstorming sessions on how we can scale this product and overcome the limitations. They have been helpful in that aspect.

Mobile App Dev for Social Investing Network

They’re by my side if I ever need anything, and I always feel like a priority. It’s a really caring business that cares about its clients. They also help you identify your target market and figure out how to capture their attention.

Game Design Artwork for App Game Company

The TekRevol team goes above and beyond what they’re asked for. They are quick to respond and have been a friendly, professional team to work with. Their help and expertise fulfill our needs.

IT Services for Occupational Therapy Professionals Org

Client satisfaction, flexibility.Aligned with company's vision and values.

Based on reputation and research, good reviews

Flexibility and adaptability

Value for money

iOS App Development for Software Testing & QA Company

Evangelist had great communication and project management throughout the project duration. Slack and Jira were used for PM and task allocation and project communication. Regular huddle meetings and weekly status reports were also published.

Mobile App Dev for Network Company

Good, easy, open communication with CEO and Project Manager making themselves available daily on stand-ups. We also integrated them into our Slack environment and they are responsive to any messages.

iOS App Dev & UI/UX Design for Sofware Dev Agency

Their communication was excellent, and they were very easy to work with because they were very supportive and collaborative. In addition to that, Evangelist Apps was cost-effective. Although what we paid seemed like a lot of money, it was worth it considering the level of work we wanted to achieve.

Staff Augmentation for Software Development Company

They are easy to work with, flexible, and with good quality resources.

IT Staff Augmentation for SaaS Company

When we had to revise the budget partway through, they were flexible and helped us adjust the developer’s rate without any fuss. That kind of support made a big difference. Another thing we liked was their flexibility and willingness to adjust the developer’s rate when we had budget concerns, showing they cared about building a long-term partnership rather than just closing a deal.

Design & Development for Medical Clinic

We also appreciated how flexible they were. When we needed to replace someone mid-project, they handled it calmly and efficiently, without slowing anything down. Overall, the whole experience felt well-supported and easy, which really helped us stay focused on building the product.

IT Staff Augmentation for Data Research Company

When we asked for someone who could work in our timezone and fit our budget, they made it happen without delays. Overall, they were responsive, flexible, and easy to work with.

Web App Dev for Charity Lottery Platform

The ability to independently translate high-level business requirements into a development strategy was outstanding. They also executed and implemented these developments extremely quickly and paid keen attention to detail.

QA Staff Augmentation for Data Center Company

We measure our success by looking at how much coverage we have over the codebase with automated tests. Since Pentalog came on board, we’ve managed to cover around 70% of our APIs with automated integration tests, which is huge. Thus far, we’re very happy with the service provided by the QA engineers from Pentalog, and their integration into our core team has been seamless.

Staff Augmentation for Personalization Tool Provider

Their ability to constantly assess talent and bring in new team members. Also, they were able to flex the team up and down as we required as our capacity needs changed.

Resource Augmentation for SaaS Platform

The attention to details and their willingness to make things right and satisfy our requirements and needs. They were extremely flexible and quick to act, which allowed us to find success very early in our relationship.

IT Staff Augmentation for Semiconductor Company

Launch Lab were really responsive and have continued to be throughout the engagement, ramping up and down the team and extending the engagement quickly and simply where we've needed to. They respond to all our requirements quickly.

Software Dev for Health Care Training Platform

I like that I didn’t have to micro-manage them. We agreed on milestones and certain breakpoints of functionality that we’d need to test. With SENLA, they really gave me their diligence, and I’m totally satisfied with that. They’re very structured, and they also use Agile methodology so they’re quite flexible. I really enjoyed their approach, where I could really see the incremental product development.

Development & Testing for Global Trading Platform

I appreciate that they look at projects in their entirety instead of the individual components (e.g. not in terms of developers, project managers, and so on). Also, they can provide additional services, which aren’t related to development or QA, such as DevOps. I can’t say there haven’t been any issues, but the process is formal, they’re responsive, and they have clear communication.

Custom Software Dev & Design for Bank

The company demonstrated an open and professional attitude throughout the project, ensuring a friendly and knowledgeable engagement. This openness was evident as the senior staff took responsibility and were well-coordinated across different geographies.

Solution Testing for Computer Software Firm

The testers over there are very qualified and talented; they have degrees in computer science. The way we work is with a team leader, but I also speak with the testers directly. I can say that they are very responsible, they are working in a very dynamic surrounding. We sometimes change the task a few times a day. They work in an efficient way and deliver the results on time.

Custom Software Development for Communication Platform

The team was able to launch the project ahead of schedule. As we needed to add updates, the team was always able to deliver on-time or ahead of schedule regardless of the task. They delivered on each item and never gave up. Even when it came to some of the most difficult tasks, they found a way through.

Custom Software Dev for Climate Tech Company

Deliverables were on time - hard to get hold of via the phone.

Software Dev & Staff Augmentation for Software Dev Company

Deazy’s overall communication and adherence to timelines have been very good. Their resources work as part of our internal team, joining our daily stand-ups and our client-facing calls to provide feedback and resolutions to issues.

Web Dev & UX/UI Design for Keys & Locks Supplying Company

They deliver on time and stay within budget. We use Jira, Confluence, Slack, Google Meet, and Zoom for project management.