Your legacy system,rebuilt for what's next.
Your existing app is slowing your team down. We modernize it without shutting it down, without a full rewrite, and without losing what already works.
of developers' time goes towards handling technical debt
of companies plan a software modernization withing a year (2025)
Give your business a digital upgrade that actually pays off.
Book a free audit
Why should you modernize your software?
Your team builds again, instead of firefighting
Once technical debt is cleared, developers spend time on features, not bug patches. Faster releases. Happier team.
- No more time lost on legacy bug patches
- Faster release cycles from sprint one
- Developers focused on new features, not maintenance
A product that stops holding you back
New architecture means stable foundation, new features, and new integrations don't break everything. Growth becomes predictable.
- Modular architecture built for new integrations
- Cloud-ready infrastructure from day one
- New developers can onboard without fear
Infrastructure that grows as your ambitions do
Faster load times, better UX, modern stack, your product stops feeling like it's from 2015. Customers notice.
- Measurably faster performance
- UI/UX brought up to current standards
- Modern tech stack your team actually wants to work with
Add Intelligence
Bring AI into your product with smart features and automated workflows.
What you get from
working with Zalehy
Zalehy is an agile web app development agency based in Hungary, with 13+ years of experience building custom software solutions for startups and scale-ups across Europe.
We are also a partner for complex projects
We also have experience in revitalising multi-platform applications that have been integrated into large systems or abandoned.
Only Medior and Senior developers
Only our experienced developers are involved in the project, so you get a better quality end result faster, without unnecessary rounds and errors.
The source code is yours
There are no hidden strings: you will also own the source code of the finished application.
Business thinking behind development
We don't just write code, we understand the market objectives and align features, timing and priorities to them.
We are also a partner for complex projects
We also have experience in revitalising multi-platform applications that have been integrated into large systems or abandoned.
Only Medior and Senior developers
Only our experienced developers are involved in the project, so you get a better quality end result faster, without unnecessary rounds and errors.
The source code is yours
There are no hidden strings: you will also own the source code of the finished application.
Business thinking behind development
We don't just write code, we understand the market objectives and align features, timing and priorities to them.
We are also a partner for complex projects
We also have experience in revitalising multi-platform applications that have been integrated into large systems or abandoned.
Only Medior and Senior developers
Only our experienced developers are involved in the project, so you get a better quality end result faster, without unnecessary rounds and errors.
The source code is yours
There are no hidden strings: you will also own the source code of the finished application.
Business thinking behind development
We don't just write code, we understand the market objectives and align features, timing and priorities to them.
We Work in Agile Sprints
We build your MVP app in focused two-week sprints, so you always know where things stand, what was built, and what comes next.
You see working software every two weeks - not just at the end
You're in every sprint review - You see exactly what was built, what it cost, and what comes next. Always.
Scope evolves as the product takes shape - If priorities shift mid-project, the backlog shifts with them. Agile means it.
Frequently Asked Questions
The proof is
in the product
Here's what happens when you work with a team that treats your success as their own.
Sleek site designand exceptional UX.
With its sleek design, intuitive UX, and advanced admin system, Zalehy significantly boosted Koala-Autorent’s conversions and operational efficiency.
Márton Szugyeczky
GM : Koala-Autorent
Zalehy deeply understands business needs to deliver fantastic solutions.
Unlike other development companies we’ve worked with, Zalehy took the time to truly understand our business and customers, ensuring solutions that effectively address our challenges.
Richard Varga
CEO : Hungarogumi
Zalehy has been our valued collaborator on over 11 distinct projects.
Over the past five years, Zalehy has consistently delivered excellent results across eleven projects, demonstrating strong commitment and reliability.
József Kiss
Former Head of Marketing : Hungarian Canoe Federation
Fast updates that exceeded expectations.
Our airport management system required multiple compliance updates. Zalehy responded quickly and consistently, delivering results that went beyond expectations.
Tamás Jakab
GM: Airport Budaörs
Quickly mastered our domain, exceptional partner.
Zalehy rapidly absorbed complex domain knowledge and gained a clear understanding of our car listing platform.
Norbert Járja
Head of Development : kocsi.hu
Strong skills, great teamwork, fast communication.
We value partners who combine expertise with strong collaboration. Zalehy brings together technical skill, effective teamwork, and clear, responsive communication.
Zoltán Beke
Creative Director: Melkweg Digital
Sleek site designand exceptional UX.
With its sleek design, intuitive UX, and advanced admin system, Zalehy significantly boosted Koala-Autorent’s conversions and operational efficiency.
Márton Szugyeczky
GM : Koala-Autorent
Zalehy deeply understands business needs to deliver fantastic solutions.
Unlike other development companies we’ve worked with, Zalehy took the time to truly understand our business and customers, ensuring solutions that effectively address our challenges.
Richard Varga
CEO : Hungarogumi
Zalehy has been our valued collaborator on over 11 distinct projects.
Over the past five years, Zalehy has consistently delivered excellent results across eleven projects, demonstrating strong commitment and reliability.
József Kiss
Former Head of Marketing : Hungarian Canoe Federation
Fast updates that exceeded expectations.
Our airport management system required multiple compliance updates. Zalehy responded quickly and consistently, delivering results that went beyond expectations.
Tamás Jakab
GM: Airport Budaörs
Quickly mastered our domain, exceptional partner.
Zalehy rapidly absorbed complex domain knowledge and gained a clear understanding of our car listing platform.
Norbert Járja
Head of Development : kocsi.hu
Strong skills, great teamwork, fast communication.
We value partners who combine expertise with strong collaboration. Zalehy brings together technical skill, effective teamwork, and clear, responsive communication.
Zoltán Beke
Creative Director: Melkweg Digital
Sleek site designand exceptional UX.
With its sleek design, intuitive UX, and advanced admin system, Zalehy significantly boosted Koala-Autorent’s conversions and operational efficiency.
Márton Szugyeczky
GM : Koala-Autorent
Zalehy deeply understands business needs to deliver fantastic solutions.
Unlike other development companies we’ve worked with, Zalehy took the time to truly understand our business and customers, ensuring solutions that effectively address our challenges.
Richard Varga
CEO : Hungarogumi
Zalehy has been our valued collaborator on over 11 distinct projects.
Over the past five years, Zalehy has consistently delivered excellent results across eleven projects, demonstrating strong commitment and reliability.
József Kiss
Former Head of Marketing : Hungarian Canoe Federation
Fast updates that exceeded expectations.
Our airport management system required multiple compliance updates. Zalehy responded quickly and consistently, delivering results that went beyond expectations.
Tamás Jakab
GM: Airport Budaörs
Quickly mastered our domain, exceptional partner.
Zalehy rapidly absorbed complex domain knowledge and gained a clear understanding of our car listing platform.
Norbert Járja
Head of Development : kocsi.hu
Strong skills, great teamwork, fast communication.
We value partners who combine expertise with strong collaboration. Zalehy brings together technical skill, effective teamwork, and clear, responsive communication.
Zoltán Beke
Creative Director: Melkweg Digital
Sleek site designand exceptional UX.
With its sleek design, intuitive UX, and advanced admin system, Zalehy significantly boosted Koala-Autorent’s conversions and operational efficiency.
Márton Szugyeczky
GM : Koala-Autorent
Zalehy deeply understands business needs to deliver fantastic solutions.
Unlike other development companies we’ve worked with, Zalehy took the time to truly understand our business and customers, ensuring solutions that effectively address our challenges.
Richard Varga
CEO : Hungarogumi
Zalehy has been our valued collaborator on over 11 distinct projects.
Over the past five years, Zalehy has consistently delivered excellent results across eleven projects, demonstrating strong commitment and reliability.
József Kiss
Former Head of Marketing : Hungarian Canoe Federation
Fast updates that exceeded expectations.
Our airport management system required multiple compliance updates. Zalehy responded quickly and consistently, delivering results that went beyond expectations.
Tamás Jakab
GM: Airport Budaörs
Quickly mastered our domain, exceptional partner.
Zalehy rapidly absorbed complex domain knowledge and gained a clear understanding of our car listing platform.
Norbert Járja
Head of Development : kocsi.hu
Strong skills, great teamwork, fast communication.
We value partners who combine expertise with strong collaboration. Zalehy brings together technical skill, effective teamwork, and clear, responsive communication.
Zoltán Beke
Creative Director: Melkweg Digital
Sleek site designand exceptional UX.
With its sleek design, intuitive UX, and advanced admin system, Zalehy significantly boosted Koala-Autorent’s conversions and operational efficiency.
Márton Szugyeczky
GM : Koala-Autorent
Zalehy deeply understands business needs to deliver fantastic solutions.
Unlike other development companies we’ve worked with, Zalehy took the time to truly understand our business and customers, ensuring solutions that effectively address our challenges.
Richard Varga
CEO : Hungarogumi
Zalehy has been our valued collaborator on over 11 distinct projects.
Over the past five years, Zalehy has consistently delivered excellent results across eleven projects, demonstrating strong commitment and reliability.
József Kiss
Former Head of Marketing : Hungarian Canoe Federation
Fast updates that exceeded expectations.
Our airport management system required multiple compliance updates. Zalehy responded quickly and consistently, delivering results that went beyond expectations.
Tamás Jakab
GM: Airport Budaörs
Quickly mastered our domain, exceptional partner.
Zalehy rapidly absorbed complex domain knowledge and gained a clear understanding of our car listing platform.
Norbert Járja
Head of Development : kocsi.hu
Strong skills, great teamwork, fast communication.
We value partners who combine expertise with strong collaboration. Zalehy brings together technical skill, effective teamwork, and clear, responsive communication.
Zoltán Beke
Creative Director: Melkweg Digital
Sleek site designand exceptional UX.
With its sleek design, intuitive UX, and advanced admin system, Zalehy significantly boosted Koala-Autorent’s conversions and operational efficiency.
Márton Szugyeczky
GM : Koala-Autorent
Zalehy deeply understands business needs to deliver fantastic solutions.
Unlike other development companies we’ve worked with, Zalehy took the time to truly understand our business and customers, ensuring solutions that effectively address our challenges.
Richard Varga
CEO : Hungarogumi
Zalehy has been our valued collaborator on over 11 distinct projects.
Over the past five years, Zalehy has consistently delivered excellent results across eleven projects, demonstrating strong commitment and reliability.
József Kiss
Former Head of Marketing : Hungarian Canoe Federation
Fast updates that exceeded expectations.
Our airport management system required multiple compliance updates. Zalehy responded quickly and consistently, delivering results that went beyond expectations.
Tamás Jakab
GM: Airport Budaörs
Quickly mastered our domain, exceptional partner.
Zalehy rapidly absorbed complex domain knowledge and gained a clear understanding of our car listing platform.
Norbert Járja
Head of Development : kocsi.hu
Strong skills, great teamwork, fast communication.
We value partners who combine expertise with strong collaboration. Zalehy brings together technical skill, effective teamwork, and clear, responsive communication.
Zoltán Beke
Creative Director: Melkweg Digital
