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

Faustino Castro, CTO at GOT MY IDOL INCVerified Review
Posted on Aug 2, 2024

“They are very smart people”

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

TH-EY's team delivered on time and met all of our requirements. They managed the project efficiently, using continuous feedback and maintaining weekly follow-ups to ensure everything was on track. The project included redesigning and developing a new version of our event landing page, as well as integrating the PARTNER API into our onboarding process. The team was exceptionally responsive and easy to work with. They adhered to all sprint deliveries and deadlines, ensuring a smooth and timely project completion. Their ability to adapt to our needs and provide continuous updates made the entire process seamless and efficient.

Matthew Quinn, FounderVerified Review
Posted on Aug 2, 2024

“They were very responsive and timely.”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
IT Services

TH-EY successfully delivered a comprehensive blueprint and actionable plan for our business launch. Their team worked closely with us to ensure that our technology stack was perfectly aligned with our business goals. The plan they provided was clear, detailed, and designed to facilitate both our immediate needs and future scalability. Throughout the project, TH-EY was incredibly responsive and adhered strictly to all deadlines. Their dedication to the project was evident, as they were always quick to respond to our needs and concerns. The seamless customer experience they provided made the entire process smooth and efficient.

Anick Akbar, Founder at PixableVerified Review
Posted on Aug 2, 2024

“Every member of the team was highly experienced and able to find elegant solutions for complex technical requirements.”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
IT Services

Working with TH-EY has significantly improved the speed and efficiency of our company's internal processes. They have executed multiple small automation projects that involved connecting various APIs, such as Salesforce, Xero, and Uptime Robot. The primary technology used for these projects was AWS Lambda for asynchronous scripting. Additionally, TH-EY has collaborated on other projects where I served as a connector between TH-EY and other companies. Their approach to each project has been meticulous and well-organized, ensuring that all solutions are both effective and elegant. Direct communication with the programmers involved has fostered a positive and productive partnership. The ability to speak directly to the developers has streamlined the process, allowing for quick adjustments and clarifications as needed. The impact of TH-EY's work is evident in the faster and more efficient internal processes we now enjoy. The automation scripts and small applications they developed have seamlessly integrated into our workflow, reducing manual effort and minimizing errors. Their expertise in handling complex technical requirements with grace and precision has been particularly impressive.

Alex Gnyla, CEO at HatchpadVerified Review
Posted on Aug 2, 2024

“TH-EY is the best development company I’ve ever worked with.”

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

Our partnership with TH-EY has been nothing short of exceptional. From the outset, their team conducted an in-depth analysis of our company to fully grasp our business needs and problems. This analytical approach has ensured that their solutions are always well-informed and highly effective. Initially, TH-EY contributed to both frontend and backend development, but their role has since shifted to focus primarily on backend work, while our in-house designer handles the design and wireframe aspects. We work closely with Wojciech (CEO) and two full-time developers, with additional support from a frontend UX designer when needed. Communication with TH-EY is seamless, facilitated through email and Slack, with weekly calls to review progress, plan upcoming tasks, and address any issues. Additionally, we often have demos throughout the week to showcase new features and completed work. TH-EY genuinely feels like an extension of our in-house team. Their dedication to understanding our business and adding value to our software development is unparalleled. Despite having worked with large development companies in the past, TH-EY stands out for their deep understanding of our problems and their innovative approach to solving them. They consistently think outside the box and strive to find more efficient ways to achieve our goals. Their availability and transparency are commendable, making project management smooth and stress-free. The team’s ability to resolve issues and implement solutions quickly and effectively has been a significant asset to our projects. I’m continually impressed with how they contribute to overcoming our business challenges and their proactive approach to improving our processes.

Anonymous
AnonymousVerified Review
Posted on Mar 1, 2024

“5-Star Experience with TH-EY: Delivering Quality, Efficiency, and Communication Excellence.”

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

My experience working with TH-EY on our digital prototype project was nothing short of exceptional. They delivered a high-quality product on time and within budget, consistently exceeding expectations throughout the entire development process. Their commitment to collaboration and transparency was particularly noteworthy. They actively listened to our needs, asked insightful questions, and provided clear and frequent communication. This collaborative approach fostered a strong sense of trust and ensured that the final product aligned perfectly with our vision.They were passionate about the work and put their best foot forward, which was evident in the overall quality of the work delivered. I was impressed with how much they cared about the organisation's vision/mission and even used their initiative to provide additional suggestions, which improved the overall design quality. Feedback so far from internal reviewers has been overwhelmingly positive.

Adel Hinrichs
Adel Hinrichs, DirectorVerified Review
Posted on Feb 26, 2024

“Customised development and excellent cooperation”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing4.0
Web DevelopmentWeb Design

The team developed my online app with custom-fit precision to my specific API integration needs. Their level of cooperation and due attention to my needs were excellent and they never lost patience in the revision rounds. A friendly and response team.

Andrew Russell
Andrew Russell, Manager at Ngaged Ltd.Verified Review
Posted on Oct 20, 2023

“A comprehensive and fully bespoke response to all our needs.”

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

TH-EY were incredible responsive in the first instance and we have found that working with them has been an incredibly rewarding experience because we feel that they are willing to take on board every suggestion and are always solution based. TH-EY have put a lot of work into helping us prioritise the features we require and have kept us updated of all developments through various means throughout the design and development phase. TH-EY listen exceptionally well and make detailed notes during any discussion to ensure that we are getting exactly what we require. TH-EY strike the right balance between being professional and personable and they are extremely patient and proactive when it comes to any changes we may wish to make. TH-EY are extremely knowledgeable and are ready to provide several solutions to any given problem so that we are able to weigh up the pros and cons of each solution and find the best way forward.

Faustino Castro
Faustino Castro, CTO at gotmy - GOT MY IDOL INCVerified Review
Posted on Sep 21, 2023

“Smart & Proffesionals”

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

We started to work together because a direct contact referral. Teams were aligned from the first day and they reached out all commited tasks on time and with high quality results (no bugs to resolve)

Michał Zaniewicz
Michał Zaniewicz, Project Manager at BricodesVerified Review
Posted on Mar 24, 2023

“Working with TH-EY has been a great experience, and I would highly recommend their services to anyone looking for software house.”

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

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 team was always available to answer any questions we had and provided us with regular updates on the project's progress. TH-EY developed a customized e-commerce platform that met all of our specific requirements. The platform is user-friendly, visually appealing, and functions seamlessly. We have received numerous positive feedback from our customers. Overall, I am extremely pleased with the cooperation with TH-EY. Their team was professional, efficient, and easy to work with. I would recommend TH-EY to anyone looking for a software house and I look forward to working with them again in the future.

Leanne Kehoe
Leanne Kehoe, Head of Channel sales at Cappaciti TechnologyVerified Review
Posted on May 19, 2022

“A helpful knowledgable team. Great value for money, Highly recommend”

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

We were introduced to TH-EY by a mutual contact that recommended them. We had our initial meeting with them, where we outlined the project. They then provided us with a proposal. Once agreed we had specific task time lines and they provided us with access to JIRA so we could see in real time what had been completed and what was a work in progress. We had regular check ins with the team and any questions or need for a meeting were always met positively and in a timely manner. We had a slack channel set up where they are always available. Whenever we ask for additional add ons to the app, they are quick to advise and always asking how the launch is going. We are super pleased with where we are now, with the mobile app. It looks great.

James Collie, Founder & CEO at OnboardVerified Review
Posted on Sep 30, 2021

“Both in terms of budget and work schedule, the team delivered work as promised.”

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

I am the founder and CEO of Onboard. TH-EY were hired to build us a custom web platform, which facilitates the whole hiring process and connects job applicants with employers. TH-EY delivered a fully functional, enterprise grade web platform in under 6 months. Throughout our collaboration TH-EY delivered work promptly and were highly communicative. Both in terms of budget and work schedule, the team delivered work as promised. I can enthusiastically recommend TH-EY to any startup founders, corporates or scale up businesses looking for full service web developers with a proven track record.

August Cayzer
August CayzerVerified Review
Posted on Jan 13, 2021

“Very good (and even better value)”

Overall rating5.0
Quality4.0
Communication5.0
Schedule & Timing5.0
Web Development

The team is very easy to get on with and very good at getting things done. They don't come with all the bells and whistles of some which some of the more expensive agencies boast but that isn't what they aim to be, they are just a very reliable, good quality company.

Ian Hewitt
Ian HewittVerified Review
Posted on Dec 3, 2020

“Good job on my project”

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

The guys at TH-EY did a fantastic job on the Chrome extension, they very quickly understood my requirements and provided useful feedback to improve the solution, they are also flexible and adapt to requests and changes in scope quickly and without issue. Even better it was on time and in budget!

Anick Akbar
Anick Akbar, Founder and Project Manager at pixableVerified Review
Posted on Jan 9, 2020

“Top-class expertise”

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

The entire team at TH-EY are experts in web technologies and software development. TH-EY has implemented several automation systems in my own business, using APIs and serverless technologies.

Ruaraidh Grubb
Ruaraidh Grubb, Founder at OWN-KINDVerified Review
Posted on Jul 4, 2019

“TH-EY - web + app development”

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

I couldn’t be happier with the TH-EY team. Responsive, hard working and objective oriented they have kept up an excellent pace and delivered great results.

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

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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