EngineeringLegacy Modernization

Your business has moved on. Your software should too.

We take over, improve and modernize the systems slowing you down. AI helps us work across unfamiliar codebases and languages, making changes that were previously too costly or difficult.

Get more from the software you have.

  • Make changes faster

    Fix issues and add features without waiting for a full rebuild.

  • Reduce maintenance costs

    Simplify fragile code, outdated infrastructure and manual workarounds.

  • Move beyond outdated technology

    Connect existing systems to modern tools or migrate to a stack your team can maintain.

Our approach

From old code to new possibilities.

  1. 01

    Understand

    Use AI-assisted analysis to map the code, dependencies and business logic, including where documentation is missing.

  2. 02

    Plan

    Decide what to fix, extend or rewrite. Prioritize business impact, cost and continuity.

  3. 03

    Modernize

    Update existing code, rebuild components and connect systems. AI helps our engineers work beyond their usual technology stack.

  4. 04

    Transition

    Test critical workflows, release changes gradually and retire old components once replacements are proven.

What you get

Working software. A clear path forward.

Codebase assessment.
A practical view of the system, its dependencies and what needs attention.
Modernization roadmap.
Priorities, scope and budget estimates for a phased delivery.
Updated software.
Fixes, new capabilities or rewritten components, with tests and documentation.
A controlled transition.
Data migration, staged releases and rollback plans where needed.
Why Cleevio

Older languages are no longer a dead end.

We’ve been building and maintaining products since 2008.

AI helps our engineers understand and modify code beyond their usual stack, including unfamiliar languages and undocumented business logic.

We can fix, extend or rewrite existing software, with engineers reviewing the changes and tests checking the behavior your business relies on.

From makers to makers
Sales & AI Advisory

Start with Jakub.

Bring a business problem, a process or an idea.
We’ll help you find the right next step.

A short intro call is often the fastest way
to see what’s worth pursuing.

Jakub Durec
Jakub DurecAI Advisory Lead
Awards & recognition

Built to stand out.

GDPR compliantZero data retention
Clutch Global Fall 2023Clutch Global Spring 2024Clutch Global Fall 2024Clutch Top Web3 Development — Czech Republic 2024
Deloitte Technology Fast 50 — 2023 Central EuropeDeloitte Technology Fast 50 — Czech RepublicDeloitte Technology Fast 500 — 2023 EMEA

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