We help you with your obsolete technology

Legacy system modernization: We maintain and evolve your applications — with zero downtime!

info@serquo.com

Does this sound like you? I have a developed application, but...

- The “IT guy” left and no one knows how to handle the code.
- The application works, but no one knows how to evolve it.
- Outdated technology makes changes difficult (COBOL, VB6, old Java...)
- Occasional crashes and risk of service loss.
- I don’t have time to deal with it.
- It no longer meets my organization’s standards.

You decide how far we go

• MAINTENANCE ONLY
Support, patches, monitoring, and incident response. We can limit our work to maintenance and bug fixing that keeps your system running.

• TECHNOLOGY EVOLUTION
Iterative improvements: new features, optimizations, and automated testing. We can go a bit further and focus on improving your application.

• MODERNIZATION
Refactoring by modules, APIs, and reducing technical debt for long-term maintainability. We can also upgrade to modern, scalable technologies to update your business core.

• CLOUD MIGRATION
Migration planning, parallel execution, and cost optimization with safe rollback. If you wish, we can move your application to the cloud.

We apply Artificial Intelligence 🤖🧠 across all our processes to make your project faster and more efficient.

Our methodology

1. Quick audit (where we start)
– Inventory, critical risks, and dependency mapping.
– We identify the highest-risk points from day one.

2. Action plan
– Clear options (maintain / improve / modernize / migrate)
– With cost/benefit recommendations.

3. Execution (with zero downtime)
– Depending on your needs, from small modifications to full modernization.

4. Security
– Vulnerability fixing.

5. Continuous support
– Dedicated team lead and reporting.
– Option to cover Level 1 / admin as needed.

ZERO DOWNTIME!

A team dedicated to you!

We ensure your rocket keeps flying — your users won’t notice any impact, pauses, or interruptions. We can make the old and new parts of your application work together seamlessly if needed. Without the end user noticing any difference between old and new.

Invest in security

By resolving vulnerabilities and bugs, and updating your technology, you’ll significantly increase the security of your products and services.

Improve your services

Bring value to your clients by improving your solutions, offering new features, becoming more competitive, and centralizing your information.

FAQ



What if the application is in COBOL / VB6 / old Java?
We perform an audit, documentation, and a recommended roadmap. We have experience with migrations and adapters to maintain service while modernizing.
Do you guarantee there will be no downtime?
We use strategies to avoid interruptions in most interventions and always plan a safe rollback.



How do you use AI?
We use artificial intelligence to handle projects faster and more efficiently, always supervised by a senior team and ensuring privacy.



What contract models do you offer?
Maintenance retainer, time & materials, milestone-based projects, or dedicated teams with an assigned team lead.
How much experience do you have with legacy maintenance?

Serquo has over 30 years of experience in technology and development, and more than 10 years specializing in legacy application maintenance.

Don’t put your business at risk

Lack of maintenance in your applications can halt your services.

From bug fixing to full application control.

We can analyze your current state, perform security audits, corrective maintenance (bug fixing), or evolutionary maintenance (small improvements).

Modern architectures. Migrate to technologies built for longevity and fully cloud-ready.

References

info@serquo.com

Contact

Download our brochure

Do you know about our operational efficiency services?

Brochure