Overview

About THEY.dev

Who are THEY?

Since our inception in 2017, we've grown into a remote team of experts, spanning from the UK to Poland. We specialize in delivering tailor-made web and mobile applications, with a keen focus on collaboration and direct client-developer interaction.

Our key strength is a consultancy approach to every client.

We've had the privilege of assisting a wide range of businesses, from young startups to well-established companies, helping them navigate the technological landscape and achieve their goals. Our success lies in our ability to match each project's unique requirements with the right expertise.

How THEY work

At THEY, we adopt a practical and flexible approach to project execution. Each journey begins with an understanding of our client's vision and thorough validation of their ideas.

Embracing a transparent and responsive workflow, we consistently deliver solutions in short, result-oriented cycles.

Quality assurance is integral to our process, with exhaustive testing at each stage ensuring every solution adheres to top-tier standards.

We prioritize open communication and regularly share project updates. This enables us to synchronize seamlessly with our clients' objectives, delivering solutions that truly resonate with their needs.

Ultimately, our aim is not just project completion, but the creation of enduring relationships with our clients.

What clients say

Review Analytics of THEY.dev

Every review is verified through Goodfirms before it's published.

4.930 Verified Reviews
Quality4.9
Schedule & Timing4.9
Communication4.9
Overall4.9
Review Summary
Summarized from 30 verified reviews · Updated August 2026
Clients consistently praise THEY.dev for strong communication, responsiveness, and technical expertise across their team. Projects are delivered on time and within budget, with the team demonstrating flexibility and a collaborative approach to understanding client needs. Reviewers highlight the quality of work, value for money, and a solution-focused mindset that extends beyond basic requirements to add tangible business impact.
✦ AI-generated summary. May not reflect every review.
Detailed Reviews of THEY.dev
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What reviewers mention most

Ed Rigg
Ed Rigg, Founder at recdekVerified Review
Posted on Feb 28, 2025

“Great! Efficient and clear at all times.”

Overall rating4.0
Quality5.0
Communication4.0
Schedule & Timing4.0
Mobile App Development

Excellent diligent developer in Cristian. Really knows his stuff. THEY have been very flexible and reacted well to our needs as a startup. They have been with us from bootstrapping and firmed up our tech from the ground up.

Rebecca Morter
Rebecca Morter, CEO at Lone Design ClubVerified Review
Posted on Feb 25, 2025

“Great!”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Software Development

TH-EY are great to work with - very cost effective, quick and collaborative - we had great experience and i highly recommend them! Communication was excellent and for a non-technical team we felt very supported and heard from start to finish.

David Stapleton
David Stapleton, FounderVerified Review
Posted on Oct 10, 2024

“Amazing company loved working with them. ”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Software Development

Wojciech and his team are super professional and are always doing great work. I couldn’t recommend their team more. They go out of their way to help and always give great customer service.

Clive Titmuss
Clive Titmuss, founder at hello hostyVerified Review
Posted on Oct 10, 2024

“these guys are the pros”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Software DevelopmentWeb Design

TH-EY Have a solid team of qualified professionals to call upon as and when required. Their knowledge and skill has been great and i really can't fault their service.

Kim Bohne, Program ManagerVerified Review
Posted on Aug 6, 2024

“TH-EY was extremely helpful in ensuring the success of our projects.”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web Design

TH-EY was instrumental in the success of our project, demonstrating flexibility and creativity throughout. We partnered with TH-EY to identify prototype goals, user groups, and MVP requirements before starting the wireframe prototype. Despite the challenging two-week deadline, they made it easy to meet our goals. The prototype was clickable and functional enough for potential customer presentations, exceeding our expectations. The daily meetings with the UX designer ensured continuous review and alignment. Their smooth communication allowed the project to progress quickly. The client was very pleased with the outcome, noting how TH-EY knew the right questions to ask, worked efficiently, and adjusted flexibly where needed.

AnonymousVerified Review
Posted on Aug 6, 2024

“We liked their cooperation and good listening skills.”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Mobile App DevelopmentSoftware Development

The app is successfully up and running, serving real clients and handling payments efficiently. TH-EY managed the project well, with the founder overseeing the process and a dedicated developer handling most of the implementation. The communication and cooperation with the external API provider caused slight delays, and the project was delivered above the initial estimated budget. Despite these challenges, the project was completed with high quality and met our expectations. The team demonstrated excellent listening skills and cooperation, ensuring that our requirements were fully understood and implemented effectively. Virtual meetings and email communications were used to keep the project on track and ensure clear collaboration.

AnonymousVerified Review
Posted on Aug 2, 2024

“We were impressed with their prompt delivery and understanding of the challenges being faced.”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web DevelopmentSoftware Development

TH-EY has successfully completed their tasks on time, effectively pushing the project towards production. The project was delivered using the Kanban methodology and was divided into three phases: design and discovery, development, and deployment. At each stage, the team conducted periodic demo calls where they presented their progress and discussed the next steps. Their consistent communication via Jira, Slack, and Confluence ensured that all project members were on the same page and that any challenges were addressed promptly. The team's systematic approach, including periodic progress reviews and efficient task management, significantly contributed to the project's smooth progression.

Harvey Cuthbert, CEO & Founder at BeautilioVerified Review
Posted on Aug 2, 2024

“TH-EY's project brought a significant increase in completed signups, facilitated by their easy communication and deep understanding.”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Mobile App DevelopmentSoftware Development

Collaborating with TH-EY was an absolute pleasure. From the outset, their professionalism and approachable nature were evident. We engaged in frequent discovery calls and meetings to outline the project roadmap, ensuring every detail was meticulously planned. We worked closely with CEO Wojciech and our lead engineer, Filip, who both displayed exceptional knowledge and dedication. The integration of a new demo page into the app was a game-changer. Within days, we observed a substantial rise in completed signups, which was a testament to the team's expertise and understanding of our needs. Communication was seamless, primarily conducted via Slack, allowing for efficient and effective exchanges throughout the project.

Martijn Klinkhamer, Director at Rivoir CapitalVerified Review
Posted on Aug 2, 2024

“TH-EY delivered on time, within budget, and with excellent quality, showing unwavering commitment to our project results.”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Software Development

Our experience with TH-EY was exceptional from start to finish. Initially contacted by a representative on LinkedIn, we were impressed by their small, dedicated team and their competitive pricing and quality. With an initial concept of what we needed, we provided TH-EY with details of our current workflow. After a few workshops, they presented us with wireframes that illustrated the end product along with detailed estimates. These wireframes were instrumental for our branding team to create the final designs. Once the designs were ready, we signed the contract, and development began. TH-EY used Java with Spring framework, React, and Microsoft SQL Server, deploying everything to the Azure cloud. Communication was seamless, primarily through Slack and emails, with regular updates and feedback sessions with one of the founders. The involvement of two dedicated developers ensured that the project stayed on track. Deliverables were consistently on time, within budget, and of outstanding quality. The thorough preparation in defining results, technical opportunities, and challenges set the foundation for a successful collaboration and excellent end results.

AnonymousVerified Review
Posted on Aug 2, 2024

“TH-EY delivered all required features plus extras, providing excellent value with quick and efficient work.”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web Development

Our collaboration with TH-EY was highly successful. We approached them with initial drafts of the design and a basic idea of how the application should function. They promptly provided an initial estimation and scope of work, which we agreed upon and signed the contract to begin. The process began with design followed by coding, with the entire project managed through Jira and broken down into tasks. Within a week, we gained access to the platform and were able to test the features as they were developed step by step. The technologies used included Java with Spring framework, React, and MySQL, all deployed to the AWS cloud. Throughout the project, communication was smooth and efficient. We primarily communicated with both company founders, who managed the project, along with three additional developers. Our interactions were conducted through Slack, Jira, and Miro, supplemented by email correspondence. TH-EY not only developed all the features outlined in the initial estimation but also incorporated additional features based on our feedback. Although we are still before the official launch, the platform meets our needs perfectly.

Kim Trager, Director at SeamlessVerified Review
Posted on Aug 2, 2024

“They have truly walked the extra mile to make solutions fit within our budgets.”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Software Development

TH-EY's proof of concept has been deployed successfully, allowing us to take on more complicated projects from customers. The project involved creating a lightweight, easily customizable dashboard solution that could be adjusted for individual client needs. The service included deploying the software to my AWS account and providing a "How to" document, along with ongoing support. The founder gathered all the project requirements and delivered the solution seamlessly. Communication was conducted through emails and Google Meetups, and the project was executed smoothly within a matter of days. TH-EY's diligence to stay within the project's limits, without sacrificing quality, stood out. They managed the workflow efficiently over a short time period and against a tight budget.

James Dent, Founder at Susterra LtdVerified Review
Posted on Aug 2, 2024

“Everything was grand.”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Software Development

The dashboard developed by TH-EY is fully functional and met the needs and requirements of our internal team. Although testing was put on hold due to the Covid-19 pandemic, the TH-EY team consistently produced quality results in a timely manner. They managed the process efficiently using a Trello board, ensuring clear and organized project management. Their ability to provide a more cost-effective solution than the one we initially considered was greatly appreciated. Despite the challenges posed by the pandemic, their high level of customer support and dedication to delivering a robust product was evident throughout the project.

Leanne Kehoe, Co-Founder at Cappaciti Technology (Urbanite)Verified Review
Posted on Aug 2, 2024

“We had direct access to multiple team members, and they were always transparent about timelines and costs.”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Mobile App Development

We had direct access to multiple team members, and they were always transparent about timelines and costs. TH-EY successfully delivered the app as specified and before the deadline, receiving positive feedback from the client. When we came to TH-EY, we had an idea of what the application should do and initial wireframes. The TH-EY team quickly iterated through the build items, releasing the app regularly to gather feedback. As a result of our feedback, some application features were changed or modified, resulting in an app closer to our initial vision. The technologies used included Java with Spring framework, React Native, and a MySQL database, with everything deployed to the AWS cloud. We communicated mostly with their mobile team lead and occasionally with their CEO. They completed the initial phase of the project ahead of schedule. One key feature was a review function that required us to authorize reviews before they went live to ensure compliance with our guidelines. This was completed quickly and at a low cost, significantly benefiting our conversations with our hospitality clients. Most of our communication was through Slack and email.

Rebecca Morter, CEO at Lone Design Club (but client wants to stay anonymous)Verified Review
Posted on Aug 2, 2024

“It was a very efficient and high-impact return for us.”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Software Development

Working with TH-EY has significantly improved our ability to manage customers and provide them with secure access to their data. The project involved extensive consulting, calls, and discussions to ensure all requirements were met. TH-EY’s team built a web platform that allows our clients to preview their data securely while enabling us to manage access and roles effectively. The main scope of work was delivered on time and within budget. The platform has enhanced our customer management capabilities and allowed our clients to view their data securely, contributing to our operational efficiency. Ad hoc calls and consulting sessions were always smooth, demonstrating TH-EY’s flexibility and dedication.

Michał Zaniewicz, Project ManagerVerified Review
Posted on Aug 2, 2024

“Their team is professional, efficient, and easy to work with.”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Software DevelopmentE-commerce Development

TH-EY has delivered a user-friendly, visually appealing, and fully functional e-commerce website, which has received several positive user feedback. From the outset, TH-EY demonstrated a high level of professionalism and expertise in their field. They took the time to listen to our needs and requirements and provided us with excellent guidance and advice throughout the entire project. Their project management was efficient, with the team providing regular updates on the project's progress and always being available to answer any questions we had. The vendor showcased high professionalism, industry expertise, and efficient project management, ensuring that the platform was delivered on time and to our satisfaction.

Focus

Service Focus of THEY.dev

How the team's effort is distributed across services.

30%30%30%10%

Industries Focus

15%10%10%10%10%10%10%5%5%5%5%5%

Client Focus

Small Business80%
Medium Business20%
Selected Work

Client Portfolio of THEY.dev

Where their work concentrates - by industry, budget, and timeline.

Project Industry

Business Services40%
Hospitality10%
Other Industries20%
Food & Beverage20%
Fintech10%
Major industry focus
Business Services

Project Cost

Not Disclosed100%
Common project cost
Not Disclosed

Project Timeline

Ongoing30%
1 to 25 Weeks20%
26 to 50 Weeks10%
51 to 100 Weeks40%
Typical timeline
51 to 100 Weeks

Clients: 29

commonsurfaceown-kindsprintyapplikatem01hatchpadfarlycappacitibeautilioonboardprsParliamentary Research ServiceMy POS ProUnimonqSonyContinuoBUA FitRevenueMLNotemSocial SwipeSecure stream VPNEnsemble IPLaunchWorksStone Door GroupInfodeskDeskbirdNudlLeanbuildJustDormantAccounts

Portfolios: 10

Executive Interview

Executive Interview of THEY.dev

Wojciech Soczynski
Wojciech Soczynski
CEO
Visit Profile

Kindly share your feedback on how Goodfirms has been doing so far in increasing your visibility among potential clients.

Clients come to us by searching the Goodfirms website for software development companies. We had a few leads from your website, none of them successful, unfortunately.

Please introduce your company and give a brief about your role within the company?

We are “TH-EY” (pronounced THEY). Our mission is to help our clients achieve greatness by providing tailored software solutions and consulting services.

I am the founder and CEO/CTO of the company. Besides management, I also actively participate in the projects by actively developing software and maintaining client communication.

What was the idea behind starting this organization?

I used to work for many types of companies during my software development career - both small, relatively unknown, and large famous brands (like J.P.Morgan and Blackrock).
 
One thing that all of these companies had in common is that there was quite often a disconnect between the business stakeholders of the project and the technical team.

Each of the groups used their own vocabulary that described the same concepts. Also many times, the developers didn’t understand the purpose of the software that they were creating.
 
The result of this state of things is that the projects were constantly delivered late, with bugs, and quite often in a way that was quite different from how the business stakeholders imagined it.
 
That’s why when I was starting my own company I wanted to do things differently. That is why we listen to our clients and learn about their business before we even write a single line of code. Also, our developers talk directly to the client's team, which greatly improves communication and lets us avoid gatekeepers.
 
We engage closely with our clients by providing them with frequent software releases, allowing for a rapid feedback loop.

What is your company’s business model–in - house team or third party vendors/ outsourcing?

Our company is quite unique in the sense that from the very start we decided to work remotely. As the CEO, I am based in London, but our developers work from around the world.

We have a regular team of 7 developers, but very often supplement it by people from our network of tried and tested freelancers. Because of that, we never have problems with finding the right people for the job and we are able to flexibly scale depending on the demand.

How is your business model beneficial from a value addition perspective to the clients compared to other companies' models?

Our business model stands on a few pillars:
  • understanding of our customer's business.
  • transparency and communication.
  • solutions that provide the best value for cost at a given time.
  • right people for the right job.

Because of the above principles, our clients express high levels of satisfaction. They know that we understand them, therefore we will deliver the right solution.
Also by giving them access to our project management tools and providing frequent releases they are always up to date on what’s going on in the project and what is their money spent on.

What industries do you generally cater to? Are your customers repetitive? If yes, what ratio of clients has been repetitive to you?

We have customers from different industries. We believe that only a strong understanding of the customer's problems allows us to deliver a successful solution.

That’s why even though our expertise is in general software development, we can engage in projects for different lines of business.

Most of our clients are startups and many of them have started their journey with us. As their business grows, they stick with us because they are confident that we can execute their vision and are happy with our work.

Mention the objectives or the parameters critical in determining the time frame of developing a mobile app.

  • number of integrations with external services
  • number of screens that the application can contain
  • regulatory burden - if the application requires any specific work required to make it compliant with the law (some examples - health or finance-related applications)
  • if it contains animations and other visual additions
  • usage of non-native components like for example custom image pickers
  • the complexity of business logic

How much effort in terms of time goes into developing the front end and back end of a mobile app?

In most cases, the backend can be developed much faster than the frontend as it doesn’t need to implement any visual aspects, but just handle the data.

What are the key parameters to be considered before selecting the right platform for a mobile application?

To choose the right platform, one has to take a few things into consideration:
  • what is the target audience, are they mostly using Android or iOS
  • is either Android or iOS providing any features not found on the other platform
  • is the application computationally intensive and the work cannot be offloaded to the backend? if yes, then the best will be to build a native app. A good example would be video editing apps.
  • if the application is not computationally intensive or the work can be offloaded to a server, the best is to build a hybrid app. Hybrid apps in this case should prove to be indistinguishable from native ones while having a lower cost of development and maintenance.

Which platform do you suggest your clients to begin with when they approach you with an idea (Android or iOS) and why?

Because both platforms are almost equally capable. It largely depends on what is the target audience for the application.

From a pure development speed point of view, I would recommend iOS because of the greater uniformity of the platform as well as a much smaller variety of screen sizes to test the app on.

Android or iOS, Native or Hybrid — which platform is best to use to build your app? What are your recommendations?

Native for apps that do a lot of processing on the phone, hybrid for everything else.

What are the key factors that you consider before deciding the cost of a mobile application?

We provide quotes for the cost of developing software based on the estimates in hours.

We create a breakdown of build items necessary for creating the app and analyze each one of them to assign an estimate to it.
 
Usually, the most time-consuming parts of development are integrations with external services as well as any specialized / highly not common features that a client may require.

What kind of payment structure do you follow to bill your clients? Is it Pay per Feature, Fixed Cost, Pay per Milestone (could be in phases, months, versions etc.)

We both estimate and bill by the hour. After trying different approaches over the years we found that it works best for both us and the clients.

This approach is the most flexible as it allows the clients to control their costs and prioritize the most important features.

We invoice our clients weekly so they have an accurate idea about the spend.

Do you take in projects which meet your basic budget requirement? If yes, what is the minimum requirement? If no, on what minimum budget you have worked for?

We don’t have a minimum budget, the smallest project that we did, cost the client 120 GBP.

What is the price range (min and max) of the projects that you catered to in 2019?

Minimum 234 GBP, maximum 34 000 GBP

Which business model do you suggest to your clients enabling them to generate revenue from mobile applications? Why?

There is no such thing as the best business model to generate revenue from any software.
 
In some cases, the software that we create complements another offering and is not expected to be profitable on its own.
 
Sometimes it lends itself better to a subscription-based model if we talk about services.

Sometimes towards commission based if the product is an e-commerce platform.

Usually, our customers best know how they want to generate the revenue from the app, our role, in this case, is mainly to suggest the best technical solutions to allow that to happen.

Where we are

Locations (1)

Offices where THEY.dev operates.

Headquarter
United Kingdom

United Kingdom

3 Wingfield Road
London, England E15 1LP
+44 783 378 5073