Kolosek

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Details

Founded:
2011
Hourly Rates:
$50 - $99 / hr
Employees:
10 - 49
Ratings:
4.8 10 Reviews

Industries Served

Manufacturing Telecommunications Fashion & Apparel Agriculture Food & Beverage Energy & Utilities Sports & Fitness Travel & Hospitality

Where We Specialize

13% Mobile App Development
Mobile App Development 13%
E-commerce Development 13%
Virtual Reality 13%
Bot Development 10%
Salesforce Development 10%
AI Development 9%
Web Design 8%
No Code/ Low Code 7%
Game Development 5%
Software Development 4%
Testing Services 4%
IoT Development 4%

Industry Expertise

Education32% Insurance31% Entertainment19% Manufacturing18%

Typical Project Size

45% Small Business
42% Midmarket Business
13% Enterprise

About

Kolosek has been in business since 2011, delivering technology projects for clients. Their work spans web development, mobile apps, and custom software projects. Kolosek employs 10 - 49 people. Projects are generally billed around $50 - $99 / hr/hr. Clients have rated Kolosek 4.3 out of 5 in 9 reviews. The team is based in Novi Sad, Serbia. These details offer a useful starting point when evaluating Kolosek.

Kolosek Reviews

4.8 10 Reviews
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Would happily work with them again

Faisal Al Zahrani / Director of Technology | Aug 25, 2026

Our experience with Kolosek was really positive from start to finish. They were upfront about what was realistic within our budget, which helped us prioritise the right features. They shared working builds regularly, so we could test early and give feedback before things were locked in.

We are already seeing better numbers than before the project. We are already discussing the next phase with them.

Project summary

We hired Kolosek to run performance and load testing ahead of a big launch. They worked alongside our in-house team, which mostly handled business requirements and testing. The project took roughly 6 months from kickoff to launch.

  • Overall Rating 4.5
  • Quality 4.0
  • Schedule 4.5
  • Project Cost 4.5
  • Willing To Refer 5.0
Project Type:
Quality Assurance & Testing
Project Cost:
$500,000+
Project Duration:
Feb 2026 - Aug 2026
Business Type:
Manufacturing
Location:
Dammam, Saudi Arabia

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I'm the Director of Technology at Copper Leaf Components Co, a Manufacturing company based in Dammam, Saudi Arabia. I look after our technology and work closely with outside partners on bigger projects.
What specific problem or business challenge led you to hire this company?
We had tried to do this internally and it stalled. We needed specialists to run performance and load testing ahead of a big launch.
What services did the company provide for your project?
Quality Assurance & Testing, plus QA and some consulting on how to structure the project.
Why did you choose this company over other providers you considered?
They had relevant experience in Manufacturing and their proposal was the clearest of the ones we received.
How clearly did the company understand your requirements and business goals?
They understood our goals quickly, partly because they had worked with Manufacturing clients before.
How was your overall experience with their communication and project management?
Good. Weekly calls, regular updates and a shared board meant we always knew where things stood.
Did the company deliver the project on time and within your expected budget?
Yes. The only extra cost came from features we added ourselves, and they quoted those fairly.
What tangible results or business impact have you seen since the project was completed?
We can now handle more volume without adding staff, which was the main goal.
What did you like most about working with this company?
How easy they were to work with. They were responsive, honest and genuinely interested in our success.
Would you recommend this company to others, and would you work with them again?
Yes, I would recommend them and we plan to work with them again.

Professional team that made a complex project feel manageable

Ravi Al Nuaimi / Director | Aug 10, 2026

We were very happy with how this project went. The developers were knowledgeable and made a few suggestions that ended up saving us time and money. The team asked a lot of questions early on, which felt slow at first but meant there were very few surprises later. Communication was consistent. We had a weekly call, a shared Slack channel and a project board we could check at any time.

The Low-Code / No-Code Development work has already made a noticeable difference — tasks that used to take hours now take minutes. I would recommend Kolosek to anyone looking for a dependable Low-Code / No-Code Development partner.

Project summary

Kolosek was brought in to build a quick MVP on a low-code stack to test our idea. They worked alongside our in-house team, which mostly handled business requirements and testing. The project took roughly 2 months from kickoff to launch.

  • Overall Rating 5.0
  • Quality 5.0
  • Schedule 5.0
  • Project Cost 5.0
  • Willing To Refer 5.0
Project Type:
Low-Code / No-Code Development
Project Cost:
Less than $10,000
Project Duration:
May 2026 - Jul 2026
Business Type:
Telecommunications
Location:
Sharjah, UAE

Questions & Answers

Please describe your company, your role, and the industry you operate in.
We're a mid-sized Telecommunications company based in Sharjah, UAE. I'm the Director and I oversaw the project from start to finish.
What specific problem or business challenge led you to hire this company?
We had tried to do this internally and it stalled. We needed specialists to build a quick MVP on a low-code stack to test our idea.
What services did the company provide for your project?
Low-Code / No-Code Development, including planning, development, testing and launch support.
Why did you choose this company over other providers you considered?
We compared three or four agencies. Kolosek asked the best questions and had good reviews from past clients.
How clearly did the company understand your requirements and business goals?
Well. There were a couple of points we had to clarify early on, but after that they were spot on.
How was your overall experience with their communication and project management?
Very responsive. We usually heard back the same day, even with the time difference.
Did the company deliver the project on time and within your expected budget?
It was delivered on time, and the final invoice matched the original estimate.
What tangible results or business impact have you seen since the project was completed?
It is still early, but the numbers are trending in the right direction and the system has been stable.
What did you like most about working with this company?
How easy they were to work with. They were responsive, honest and genuinely interested in our success.
Would you recommend this company to others, and would you work with them again?
Yes. They are a reliable Low-Code / No-Code Development partner.

Exceeded our expectations on quality and communication

Megan Henderson / Chief Digital Officer | Aug 07, 2026

I would rate this engagement highly on almost every front. They were upfront about what was realistic within our budget, which helped us prioritise the right features. They shared working builds regularly, so we could test early and give feedback before things were locked in.

We launched on schedule and have not had any major issues since. I would recommend Kolosek to anyone looking for a dependable AI & Machine Learning partner.

Project summary

We engaged Kolosek to automate document data extraction that our team was doing by hand. They worked alongside our in-house team, which mostly handled business requirements and testing. Overall it was a 5-month engagement.

  • Overall Rating 4.5
  • Quality 4.5
  • Schedule 5.0
  • Project Cost 4.5
  • Willing To Refer 5.0
Project Type:
AI & Machine Learning
Project Cost:
$500,000+
Project Duration:
Dec 2025 - May 2026
Business Type:
Fashion & Apparel
Location:
Seattle, USA

Questions & Answers

Please describe your company, your role, and the industry you operate in.
We're a mid-sized Fashion & Apparel company based in Seattle, USA. I'm the Chief Digital Officer and I oversaw the project from start to finish.
What specific problem or business challenge led you to hire this company?
We needed to automate document data extraction that our team was doing by hand, and we didn't have the in-house capacity to do it ourselves.
What services did the company provide for your project?
AI & Machine Learning, plus QA and some consulting on how to structure the project.
Why did you choose this company over other providers you considered?
A colleague recommended them, and our first calls confirmed they understood what we needed.
How clearly did the company understand your requirements and business goals?
They understood our goals quickly, partly because they had worked with Fashion & Apparel clients before.
How was your overall experience with their communication and project management?
Communication was good overall and improved further once we settled into a routine.
Did the company deliver the project on time and within your expected budget?
Mostly. One milestone slipped by about a week, but the final delivery was on schedule and the budget held.
What tangible results or business impact have you seen since the project was completed?
Customer feedback has been positive, and we have seen better engagement since going live.
What did you like most about working with this company?
How easy they were to work with. They were responsive, honest and genuinely interested in our success.
Would you recommend this company to others, and would you work with them again?
Definitely. We have already started talking about the next phase.

Reliable IoT Development Partner That Delivered What They Promised

Layla Khan / Director of IT | Jul 12, 2026

Overall we had a good experience working with Kolosek. Communication was consistent. We had a weekly call, a shared Slack channel and a project board we could check at any time. Even with the time zone difference, responses usually came the same day and we never felt left in the dark. We dealt with the same core team throughout, so we did not have to keep re-explaining things.

Feedback from our customers has been very positive so far. We had to follow up a few times on smaller bug fixes after launch. Overall, a team we trust and plan to keep working with.

Project summary

Our company worked with Kolosek to build firmware and a companion app for a smart device we were launching. The work covered requirements, design, development, testing and launch support. We worked together for around 7 months.

  • Overall Rating 4.0
  • Quality 4.0
  • Schedule 4.0
  • Project Cost 4.5
  • Willing To Refer 5.0
Project Type:
IoT Development
Project Cost:
$500,000+
Project Duration:
Nov 2025 - Jun 2026
Business Type:
Agriculture
Location:
Sharjah, UAE

Questions & Answers

Please describe your company, your role, and the industry you operate in.
We're a mid-sized Agriculture company based in Sharjah, UAE. I'm the Director of IT and I oversaw the project from start to finish.
What specific problem or business challenge led you to hire this company?
Our team was spending too much time on manual work. The goal was to build firmware and a companion app for a smart device we were launching so they could focus on customers.
What services did the company provide for your project?
IoT Development, including planning, development, testing and launch support.
Why did you choose this company over other providers you considered?
They had relevant experience in Agriculture and their proposal was the clearest of the ones we received.
How clearly did the company understand your requirements and business goals?
Very well. They asked a lot of questions upfront and turned our rough ideas into a clear plan.
How was your overall experience with their communication and project management?
Organised and transparent. Their project manager kept the project on track and flagged risks early.
Did the company deliver the project on time and within your expected budget?
Yes. The only extra cost came from features we added ourselves, and they quoted those fairly.
What tangible results or business impact have you seen since the project was completed?
It is still early, but the numbers are trending in the right direction and the system has been stable.
What did you like most about working with this company?
Their attention to detail and the quality of the final product.
Would you recommend this company to others, and would you work with them again?
Yes, I've already recommended them to a couple of people I know.

Good value and a team that genuinely cares about the result

Darragh Walsh / CTO | Jul 11, 2026

Kolosek did an excellent job for us. They shared working builds regularly, so we could test early and give feedback before things were locked in. We dealt with the same core team throughout, so we did not have to keep re-explaining things.

We are already seeing better numbers than before the project.

We are already discussing the next phase with them.

Project summary

Kolosek was brought in to run performance and load testing ahead of a big launch. They worked alongside our in-house team, which mostly handled business requirements and testing. The project took roughly 4 months from kickoff to launch.

  • Overall Rating 5.0
  • Quality 4.5
  • Schedule 4.5
  • Project Cost 5.0
  • Willing To Refer 5.0
Project Type:
Quality Assurance & Testing
Project Cost:
$50,000 to $149,999
Project Duration:
Feb 2026 - Jun 2026
Business Type:
Food & Beverage
Location:
Galway, Ireland

Questions & Answers

Please describe your company, your role, and the industry you operate in.
We're a mid-sized Food & Beverage company based in Galway, Ireland. I'm the CTO and I oversaw the project from start to finish.
What specific problem or business challenge led you to hire this company?
Our existing setup was holding us back. We wanted to run performance and load testing ahead of a big launch before our busy season.
What services did the company provide for your project?
Quality Assurance & Testing, plus QA and some consulting on how to structure the project.
Why did you choose this company over other providers you considered?
We compared three or four agencies. Kolosek asked the best questions and had good reviews from past clients.
How clearly did the company understand your requirements and business goals?
They understood our goals quickly, partly because they had worked with Food & Beverage clients before.
How was your overall experience with their communication and project management?
Good. Weekly calls, regular updates and a shared board meant we always knew where things stood.
Did the company deliver the project on time and within your expected budget?
It was delivered on time, and the final invoice matched the original estimate.
What tangible results or business impact have you seen since the project was completed?
It is still early, but the numbers are trending in the right direction and the system has been stable.
What did you like most about working with this company?
How easy they were to work with. They were responsive, honest and genuinely interested in our success.
Would you recommend this company to others, and would you work with them again?
Yes, I would recommend them and we plan to work with them again.

They listened, asked the right questions, and delivered

Rachel Wong / Product Manager | Jun 25, 2026

Honestly, this was one of the smoothest projects we have run with an outside team. The team asked a lot of questions early on, which felt slow at first but meant there were very few surprises later. We dealt with the same core team throughout, so we did not have to keep re-explaining things. The developers were knowledgeable and made a few suggestions that ended up saving us time and money.

The Software Development work has already made a noticeable difference — tasks that used to take hours now take minutes. If you need a team that communicates well and delivers, they are a good choice.

Project summary

We partnered with Kolosek to develop a scheduling and dispatch tool for our field team. The project was split into milestones, with a working build shared at the end of each one. We worked together for around 8 months.

  • Overall Rating 5.0
  • Quality 5.0
  • Schedule 5.0
  • Project Cost 5.0
  • Willing To Refer 5.0
Project Type:
Software Development
Project Cost:
$50,000 to $149,999
Project Duration:
Oct 2025 - Jun 2026
Business Type:
Fashion & Apparel
Location:
Singapore

Questions & Answers

Please describe your company, your role, and the industry you operate in.
We're a mid-sized Fashion & Apparel company based in Singapore. I'm the Product Manager and I oversaw the project from start to finish.
What specific problem or business challenge led you to hire this company?
Our existing setup was holding us back. We wanted to develop a scheduling and dispatch tool for our field team before our busy season.
What services did the company provide for your project?
End-to-end Software Development — from requirements and design through to deployment and a support period afterwards.
Why did you choose this company over other providers you considered?
Their pricing was fair and they were honest about timelines instead of just telling us what we wanted to hear.
How clearly did the company understand your requirements and business goals?
Well. There were a couple of points we had to clarify early on, but after that they were spot on.
How was your overall experience with their communication and project management?
Very responsive. We usually heard back the same day, even with the time difference.
Did the company deliver the project on time and within your expected budget?
Mostly. One milestone slipped by about a week, but the final delivery was on schedule and the budget held.
What tangible results or business impact have you seen since the project was completed?
We can now handle more volume without adding staff, which was the main goal.
What did you like most about working with this company?
How easy they were to work with. They were responsive, honest and genuinely interested in our success.
Would you recommend this company to others, and would you work with them again?
Definitely. We have already started talking about the next phase.

Reliable Game Development Partner That Delivered What They Promised

Julie Campbell / CEO | Jun 21, 2026

I would rate this engagement highly on almost every front. Even with the time zone difference, responses usually came the same day and we never felt left in the dark. They were upfront about what was realistic within our budget, which helped us prioritise the right features.

We are already seeing better numbers than before the project. We are already discussing the next phase with them.

Project summary

Kolosek was brought in to develop a casual mobile game from concept to launch. They worked alongside our in-house team, which mostly handled business requirements and testing. The engagement ran for about 8 months.

  • Overall Rating 5.0
  • Quality 4.5
  • Schedule 4.5
  • Project Cost 5.0
  • Willing To Refer 5.0
Project Type:
Game Development
Project Cost:
$10,000 to $49,999
Project Duration:
Aug 2025 - Apr 2026
Business Type:
Energy & Utilities
Location:
Waterloo, Canada

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I work as CEO at Fairway Energy. We operate in Energy & Utilities and most of our customers are in and around Waterloo, Canada.
What specific problem or business challenge led you to hire this company?
Our team was spending too much time on manual work. The goal was to develop a casual mobile game from concept to launch so they could focus on customers.
What services did the company provide for your project?
End-to-end Game Development — from requirements and design through to deployment and a support period afterwards.
Why did you choose this company over other providers you considered?
They had relevant experience in Energy & Utilities and their proposal was the clearest of the ones we received.
How clearly did the company understand your requirements and business goals?
Very well. They asked a lot of questions upfront and turned our rough ideas into a clear plan.
How was your overall experience with their communication and project management?
Organised and transparent. Their project manager kept the project on track and flagged risks early.
Did the company deliver the project on time and within your expected budget?
Yes, on time and within budget.
What tangible results or business impact have you seen since the project was completed?
It is still early, but the numbers are trending in the right direction and the system has been stable.
What did you like most about working with this company?
Their attention to detail and the quality of the final product.
Would you recommend this company to others, and would you work with them again?
Yes, I've already recommended them to a couple of people I know.

Delivered on time and stayed involved after launch

Saud Al Otaibi / Program Manager | Jun 14, 2026

We were very happy with how this project went. They took the time to understand our business before suggesting anything, which we appreciated after previous agencies jumped straight into building. We dealt with the same core team throughout, so we did not have to keep re-explaining things.

The E-commerce Development work has already made a noticeable difference — tasks that used to take hours now take minutes. Happy to recommend them.

Project summary

Kolosek was brought in to add subscriptions and a better checkout to our existing store. The project was split into milestones, with a working build shared at the end of each one. The engagement ran for about 4 months.

  • Overall Rating 5.0
  • Quality 5.0
  • Schedule 5.0
  • Project Cost 4.5
  • Willing To Refer 5.0
Project Type:
E-commerce Development
Project Cost:
$500,000+
Project Duration:
Dec 2025 - Apr 2026
Business Type:
Fashion & Apparel
Location:
Jeddah, Saudi Arabia

Questions & Answers

Please describe your company, your role, and the industry you operate in.
Maple Apparel Co is a Fashion & Apparel business in Jeddah, Saudi Arabia. As Program Manager, I was responsible for this project on our side and the main contact for Kolosek.
What specific problem or business challenge led you to hire this company?
Our existing setup was holding us back. We wanted to add subscriptions and a better checkout to our existing store before our busy season.
What services did the company provide for your project?
End-to-end E-commerce Development — from requirements and design through to deployment and a support period afterwards.
Why did you choose this company over other providers you considered?
We compared three or four agencies. Kolosek asked the best questions and had good reviews from past clients.
How clearly did the company understand your requirements and business goals?
Better than we expected. They pointed out a few things we had not thought about.
How was your overall experience with their communication and project management?
Organised and transparent. Their project manager kept the project on track and flagged risks early.
Did the company deliver the project on time and within your expected budget?
It was delivered on time, and the final invoice matched the original estimate.
What tangible results or business impact have you seen since the project was completed?
It is still early, but the numbers are trending in the right direction and the system has been stable.
What did you like most about working with this company?
That they were proactive — they suggested improvements instead of just doing what was asked.
Would you recommend this company to others, and would you work with them again?
Definitely. We have already started talking about the next phase.

Kolosek Delivered a Quality Software Development Solution on Time

Noah Sandhu / Owner | Jan 10, 2026

Our experience with Kolosek was really positive from start to finish. They shared working builds regularly, so we could test early and give feedback before things were locked in. When we changed our minds on a couple of features halfway through, they handled it without fuss and were clear about the impact on cost and timeline. The team asked a lot of questions early on, which felt slow at first but meant there were very few surprises later.

It has made a real difference to how our team works day to day.

We are already discussing the next phase with them.

Project summary

Kolosek was brought in to build a custom operations platform to replace the spreadsheets and email threads we were running the business on. They worked alongside our in-house team, which mostly handled business requirements and testing. We worked together for around 2 months.

  • Overall Rating 5.0
  • Quality 5.0
  • Schedule 5.0
  • Project Cost 5.0
  • Willing To Refer 5.0
Project Type:
Software Development
Project Cost:
$10,000 to $49,999
Project Duration:
Sep 2025 - Nov 2025
Business Type:
Sports & Fitness
Location:
Edmonton, Canada

Questions & Answers

Please describe your company, your role, and the industry you operate in.
We're a mid-sized Sports & Fitness company based in Edmonton, Canada. I'm the Owner and I oversaw the project from start to finish.
What specific problem or business challenge led you to hire this company?
We had tried to do this internally and it stalled. We needed specialists to build a custom operations platform to replace the spreadsheets and email threads we were running the business on.
What services did the company provide for your project?
Software Development, plus QA and some consulting on how to structure the project.
Why did you choose this company over other providers you considered?
They had relevant experience in Sports & Fitness and their proposal was the clearest of the ones we received.
How clearly did the company understand your requirements and business goals?
Very well. They asked a lot of questions upfront and turned our rough ideas into a clear plan.
How was your overall experience with their communication and project management?
Communication was good overall and improved further once we settled into a routine.
Did the company deliver the project on time and within your expected budget?
Yes, on time and within budget.
What tangible results or business impact have you seen since the project was completed?
It is still early, but the numbers are trending in the right direction and the system has been stable.
What did you like most about working with this company?
How easy they were to work with. They were responsive, honest and genuinely interested in our success.
Would you recommend this company to others, and would you work with them again?
Yes. They are a reliable Software Development partner.

Easy to work with and very transparent on timelines and cost

Niamh Byrne / IT Director | Jan 09, 2026

Kolosek did an excellent job for us. They were upfront about what was realistic within our budget, which helped us prioritise the right features. We dealt with the same core team throughout, so we did not have to keep re-explaining things.

The UI/UX Design work has already made a noticeable difference — tasks that used to take hours now take minutes. Overall, a team we trust and plan to keep working with.

Project summary

Our company worked with Kolosek to run user research and create new designs for our mobile app. The work covered requirements, design, development, testing and launch support. We worked together for around 8 months.

  • Overall Rating 5.0
  • Quality 5.0
  • Schedule 4.5
  • Project Cost 5.0
  • Willing To Refer 5.0
Project Type:
UI/UX Design
Project Cost:
$50,000 to $149,999
Project Duration:
Mar 2025 - Oct 2025
Business Type:
Travel & Hospitality
Location:
Dublin, Ireland

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I'm the IT Director at Swift Hospitality Ltd, a Travel & Hospitality company based in Dublin, Ireland. I look after our technology and work closely with outside partners on bigger projects.
What specific problem or business challenge led you to hire this company?
We needed to run user research and create new designs for our mobile app, and we didn't have the in-house capacity to do it ourselves.
What services did the company provide for your project?
Mainly UI/UX Design. They also helped with the technical planning and a few integrations with our existing tools.
Why did you choose this company over other providers you considered?
A colleague recommended them, and our first calls confirmed they understood what we needed.
How clearly did the company understand your requirements and business goals?
Well. There were a couple of points we had to clarify early on, but after that they were spot on.
How was your overall experience with their communication and project management?
Good. Weekly calls, regular updates and a shared board meant we always knew where things stood.
Did the company deliver the project on time and within your expected budget?
It was delivered on time, and the final invoice matched the original estimate.
What tangible results or business impact have you seen since the project was completed?
Customer feedback has been positive, and we have seen better engagement since going live.
What did you like most about working with this company?
That they were proactive — they suggested improvements instead of just doing what was asked.
Would you recommend this company to others, and would you work with them again?
Yes, I've already recommended them to a couple of people I know.
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