WHAT WE DO
Experts in Ruby & Modern Web
Ruby is our specialty. We develop applications and restore legacy systems' lives.
From creating new apps in your preferred programming language, updating Ruby applications, designing modern React front-ends, to fast no-code or low-code prototypes.
We will advise you on the best solution and take care of your project, while always putting your business first.
SERVICES
Strategic partnerships,
focus on results



Ruby and Ruby On Rails
Ruby is our main domain, so we build efficient and scalable digital products. We provide a full range of work: from UX/UI design as well as backend and frontend — from implementation to maintenance. We use the latest technologies (Rails 6/7/8, React, AWS, and more) to deliver a solution perfectly tailored to your business.
And if you have an older application in Ruby that is causing problems or no one wants to take on the upgrade, we specialize in rescue projects: we optimize obsolete code, clean up architecture, remove bottlenecks, improve application performance. We perfectly understand the challenges of older versions of Rails and can breathe new life into key systems, minimizing the risk of downtime.
01
Ruby and Ruby On Rails experts
02
Over 15 years experience in Ruby coding
03
Building, improving and managing Ruby applications
04
Ruby legacy — Update, development and refactoring of older applications in Ruby
years of experience
years of experience
countries served
countries served



Custom software development
From conception to implementation and support, we design and deliver custom applications tailored to meet the needs of any industry.
While Ruby is our specialty, we use a wide range of modern technologies to ensure a perfect fit for your project needs. Our expertise and comprehensive approach guarantee effective solutions that deliver results and keep your company at the forefront.
01
Web & Mobile development
02
Ruby on Rails specialists & dedicated tech teams
03
Dedicated teams in Poland
04
Continuous Improvement & Maintenance
%
%
%
less time to market
less time to market
%
%
%
cost reduction
cost reduction
%
%
%
saved on admin
saved on admin



Dedicated IT Teams in Poland
We build and manage tailored development teams—from recruitment to day-to-day delivery—so you can focus on growing your business. We hire only the top 1–2% of professionals who share your values and commit for the long run, ensuring a perfect cultural fit from day one.
01
Expert Teams, Seamless Cultural Fit
02
Full HR & Admin Support
03
Staff Augmentation & Recruitment
04
Long-Term Team Management
%
%
%
higher retention
higher retention
%
%
%
lower hiring costs
lower hiring costs
%
%
%
saved on admin
saved on admin



Low-code and no-code solutions
Go to market fast, validate your concept, and gather feedback without extensive development time or resources. Whether you’re a startup or an established business testing a new idea, we empower you to launch your MVP with speed, reduced costs, and focus on refining your vision.
01
MVP & Proof of Concept
02
Rapid Prototyping (Bubble.io)
03
Low-code Mobile Builds (FlutterFlow)
04
Early Feedback & Iteration
%
%
%
less time to market
less time to market
%
%
%
cost reduction
cost reduction
%
%
%
less resources allocation
less resources allocation
OUR AWARDS
We're delighted to hold a 5.0 ★ Clutch rating from our trusted partners.








SELECTED WORKS
Success proven
by measurable results
"I have come to know Dariusz and his team as excellent business partners. I have absolute trust in my business partner in terms of general conditions, reliability and quality of work."
Urs Casty
CEO and Founder at yousty.ch
"Their integrity, expertise, attention to detail and solution centred approach, has allowed us to exceed our goals many times over with the projects continually come in under budget."
Geoff Hucker
CEO at Work for Impact
"We have acquired a competent, willing and highly professional partner. Their proposed solutions are efficient and we can rapidly test a working product."
Áron Horváth, PhD
Founder at eltinga.hu
"I have come to know Dariusz and his team as excellent business partners. I have absolute trust in my business partner in terms of general conditions, reliability and quality of work."
Urs Casty
CEO and Founder at yousty.ch
"Their integrity, expertise, attention to detail and solution centred approach, has allowed us to exceed our goals many times over with the projects continually come in under budget."
Geoff Hucker
CEO at Work for Impact
"We have acquired a competent, willing and highly professional partner. Their proposed solutions are efficient and we can rapidly test a working product."
Áron Horváth, PhD
Founder at eltinga.hu
"I have come to know Dariusz and his team as excellent business partners. I have absolute trust in my business partner in terms of general conditions, reliability and quality of work."
Urs Casty
CEO and Founder at yousty.ch
"Their integrity, expertise, attention to detail and solution centred approach, has allowed us to exceed our goals many times over with the projects continually come in under budget."
Geoff Hucker
CEO at Work for Impact
"We have acquired a competent, willing and highly professional partner. Their proposed solutions are efficient and we can rapidly test a working product."
Áron Horváth, PhD
Founder at eltinga.hu
"I have come to know Dariusz and his team as excellent business partners. I have absolute trust in my business partner in terms of general conditions, reliability and quality of work."
Urs Casty
CEO and Founder at yousty.ch
"Their integrity, expertise, attention to detail and solution centred approach, has allowed us to exceed our goals many times over with the projects continually come in under budget."
Geoff Hucker
CEO at Work for Impact
"We have acquired a competent, willing and highly professional partner. Their proposed solutions are efficient and we can rapidly test a working product."
Áron Horváth, PhD
Founder at eltinga.hu
"I have come to know Dariusz and his team as excellent business partners. I have absolute trust in my business partner in terms of general conditions, reliability and quality of work."
Urs Casty
CEO and Founder at yousty.ch
"Their integrity, expertise, attention to detail and solution centred approach, has allowed us to exceed our goals many times over with the projects continually come in under budget."
Geoff Hucker
CEO at Work for Impact
"We have acquired a competent, willing and highly professional partner. Their proposed solutions are efficient and we can rapidly test a working product."
Áron Horváth, PhD
Founder at eltinga.hu
"I have come to know Dariusz and his team as excellent business partners. I have absolute trust in my business partner in terms of general conditions, reliability and quality of work."
Urs Casty
CEO and Founder at yousty.ch
"Their integrity, expertise, attention to detail and solution centred approach, has allowed us to exceed our goals many times over with the projects continually come in under budget."
Geoff Hucker
CEO at Work for Impact
"We have acquired a competent, willing and highly professional partner. Their proposed solutions are efficient and we can rapidly test a working product."
Áron Horváth, PhD
Founder at eltinga.hu
"I have come to know Dariusz and his team as excellent business partners. I have absolute trust in my business partner in terms of general conditions, reliability and quality of work."
Urs Casty
CEO and Founder at yousty.ch
"Their integrity, expertise, attention to detail and solution centred approach, has allowed us to exceed our goals many times over with the projects continually come in under budget."
Geoff Hucker
CEO at Work for Impact
"We have acquired a competent, willing and highly professional partner. Their proposed solutions are efficient and we can rapidly test a working product."
Áron Horváth, PhD
Founder at eltinga.hu
"I have come to know Dariusz and his team as excellent business partners. I have absolute trust in my business partner in terms of general conditions, reliability and quality of work."
Urs Casty
CEO and Founder at yousty.ch
"Their integrity, expertise, attention to detail and solution centred approach, has allowed us to exceed our goals many times over with the projects continually come in under budget."
Geoff Hucker
CEO at Work for Impact
"We have acquired a competent, willing and highly professional partner. Their proposed solutions are efficient and we can rapidly test a working product."
Áron Horváth, PhD
Founder at eltinga.hu
OUR MANIFESTO
We’ve spent 15 years helping startups and established companies drive technological progress and build lasting relationships — because every great idea deserves a partner as committed to success as you are.
We’ve spent 15 years helping startups and established companies drive technological progress and build lasting relationships — because every great idea deserves a partner as committed to success as you are.
We’ve spent 15 years helping startups and established companies drive technological progress and build lasting relationships — because every great idea deserves a partner as committed to success as you are.
Have a project idea? Let's talk and bring it to life
Your highly qualified specialists are here. Get in touch to see what we can do together.
Have a project idea? Let's talk and bring it to life
Your highly qualified specialists are here. Get in touch to see what we can do together.
Have a project idea? Let's talk and bring it to life
Your highly qualified specialists are here. Get in touch to see what we can do together.
Where to find us
©2009 - 2025 Useo sp. z o.o.
Where to find us
©2009 - 2025 Useo sp. z o.o.
Where to find us
©2009 - 2025 Useo sp. z o.o.