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Application Modernization without business disruption.

When your legacy systems slow down operations, create security risks, or can't support new business requirements.

We modernize outdated software step by step - upgrading technology, improving performance, and enabling new capabilities without stopping operations.

Dealing with legacy system challenges?

Tell us about your current system. We'll assess the situation and recommend the best modernization approach.

Request a Free Consultation

Sound familiar?

When your software starts holding you back instead of moving you forward.

System is slow and unreliable

Page loads take seconds, timeouts are frequent, and users have learned to work around the system's limitations instead of relying on it.

Security concerns keep growing

Outdated frameworks, unpatched dependencies, and no security updates. Every month the risk increases.

Can't add new features

Every change request takes disproportionately long because the codebase is fragile and poorly documented.

Finding developers is impossible

The technology is so outdated that no one wants to work on it. Your current team dreads maintenance.

What does application modernization mean in practice?

We take your existing system and bring it to modern standards - step by step, with minimal disruption to your business.

Technology stack upgrade

We migrate to modern frameworks and languages while preserving your business logic and data. No rewrite from scratch unless necessary.

Database optimization and migration

We optimize queries, restructure schemas, and migrate to modern database systems when needed.

Performance and security hardening

Caching, CDN, code optimization and security patches. Measurable improvements from the first sprint.

Architecture for growth

We restructure the application so new features can be added quickly and reliably. Clean APIs, modular design, automated testing.

How can we help?

Whether you need a full assessment or you know exactly what needs to be modernized - we can help.

Not sure what needs to change?

Start with EVOLUTIQ™

Recommended if:

  • You're not sure whether to modernize, replace or rebuild
  • You want an independent assessment of your system's condition
  • You need a cost-benefit analysis before deciding
  • Multiple systems are involved and priorities aren't clear

The EVOLUTIQ™ assessment evaluates your system's health and recommends the most cost-effective modernization path.

Learn about EVOLUTIQ™

Know what needs to be modernized?

Request a quote

Direct engagement if:

  • You have a specific system that needs upgrading
  • You know which technology you want to migrate to
  • You need performance optimization or security hardening
  • You want to refactor a monolith into a modern architecture

Tell us about your system and we'll provide a modernization plan with timeline and costs.

Request a Free Consultation

How does application modernization work?

Step 01

System assessment

We review the current codebase, architecture, dependencies and infrastructure. We identify risks, technical debt and modernization opportunities.

Step 02

Modernization strategy

We define the approach: incremental refactoring, platform migration, partial rewrite or full rebuild - based on cost-benefit analysis.

Step 03

Priority implementation

We start with the highest-impact improvements: critical security patches, performance bottlenecks, and architecture quick wins.

Step 04

Migration and refactoring

Step-by-step migration to modern technology. The old system keeps running until each component is safely replaced.

Step 05

Testing and validation

Comprehensive testing ensures the modernized system behaves identically to the original - with better performance and security.

Step 06

Handover and warranty

We deploy the modernized system, train your team and provide a warranty period for any issues.

Ügyfeleink mondják.

We couldn't be happier with the custom software development solutions that NEXEN IT delivered. Their team listened to our needs and worked closely with us to develop a solution that met all our requirements. The end result was a high-quality product that has helped us optimize our business processes and increase efficiency.

Judit Bogatin

MD

NEXEN IT's mobile app development team exceeded our expectations in delivering an outstanding product. Their attention to detail and ability to understand our vision has resulted in an app that has helped us better connect with our customers and improve their overall experience.

Árpád Kajon

CEO

Working with you has changed our lives. The artificial intelligence-driven software development solutions have helped automate our processes and streamline workflows. The team's expertise and dedication represent an invaluable asset for our business.

Márk Sólyom

Director

Your IT consulting has greatly contributed to achieving our goals. Your team of experts provided us with valuable insights and recommendations, which helped us improve our operations and stay ahead of the competition. We can highly recommend NEXEN IT.

Zsuzsanna Kocsis

Grant Writer

Thank you very much! I must say that I am very satisfied and happy. :) I'm glad that I chose you for this project and I truly felt that my 'baby' was in safe hands with you.

Klára Gálik

Coach

FAQ.

Modernization is almost always more cost-effective and less risky. We only recommend a full rebuild when the existing codebase is truly unsalvageable. In most cases, incremental modernization delivers better results.

It depends on the system's size and condition. A focused modernization (security, performance, one module) can start from €10,000-20,000. Full platform migrations are larger projects. We provide a quote after the assessment.

Yes. We use strategies like parallel running, feature flags and gradual rollout to minimize or eliminate downtime during the transition.

That's common with legacy systems. We reverse-engineer the business logic from the codebase and create documentation as part of the modernization.

Quick wins (security, performance) can be delivered in 2-4 weeks. A full platform migration typically takes 3-6 months, delivered incrementally.

Request a consultation.

Tell us about the system you want to modernize. We'll get back to you within 1 business day.