Fixed-phase migration
Best for: a defined scope with a known target architecture and clear milestones.
Fixed price per phase, agreed before each phase starts.
You approve each phase before the next begins; scope per phase is locked.
Back to Services
Service
Legacy Modernization
We modernize legacy systems for organizations that can't afford big-bang rewrites. Using the strangler fig pattern and event-driven migration approaches, we incrementally replace legacy components while keeping production running.
Government ministries served
Largest single contract delivered
Engineers across .NET and Java
Security and quality certifications
Who this is for
A system nobody dares to touch
Your core system still runs the business, but every change feels risky and the original authors are long gone. We map it before we change anything.
Maintenance cost and risk keep rising
An aging stack is getting expensive to keep alive, harder to staff, and slower to change. Modernization brings the cost and risk curve back down.
You can't ship features fast enough
New requirements stall against a brittle legacy core. We open up the system incrementally so the business can move again — without a rewrite.
What We Build
- Strangler fig pattern migrations
- Database modernization and migration
- Monolith-to-microservices decomposition
- API layer extraction from legacy backends
- Technology stack modernization (.NET, Java upgrades)
- Compliance and security uplift of existing systems
How we deliver
No big-bang rewrites. We audit the existing system, identify the highest-risk components, and build the migration path iteratively — with production staying live throughout.
1
Audit and risk map
We assess the existing system, its dependencies, and data, then rank components by risk and business value. The result is a clear map of what to touch first.
2
Incremental migration plan
We design a sequenced migration path — not a big-bang rewrite — with milestones, rollback points, and a strategy to keep production live at every step.
3
Strangler-fig replacement
We build new components around the legacy core and route traffic to them gradually using the strangler fig pattern and event-driven integration, with production running throughout.
4
Cutover and decommission
Once a modernized component is proven in production, we shift the remaining traffic, retire the legacy part safely, and hand over documentation.
Why Softopus
No big-bang rewrites
We never throw away a working system and hope the replacement lands. We replace it piece by piece, with each step independently verifiable.
Production stays live
Modernization happens around a running system. There is no scheduled outage where the business goes dark while we migrate.
Risk-first sequencing
We tackle the highest-risk, highest-value components first, so the biggest uncertainties are resolved early — not discovered at cutover.
You keep operating throughout
Your teams keep running the business on the system during the entire migration. Nothing is paused waiting for the new stack.
Engagement models
Time & materials
Best for: evolving scope where priorities shift as the legacy system is uncovered.
Billed for actual time and effort, reported transparently.
You reprioritize the backlog continuously and adjust direction at any point.
Dedicated modernization team
Best for: large, long-running modernization that runs alongside your own teams.
Monthly rate for a dedicated, stable team.
You direct the team's roadmap and integrate it with your internal planning.
Industries we serve
Public sector
Long-lived systems under regulatory scrutiny that must modernize without service interruption.
Healthcare
Critical systems handling sensitive data where availability and continuity are non-negotiable.
Energy and utilities
Operational systems where downtime carries real-world risk and migrations must be incremental.
Finance
Core systems with strict audit and data-integrity requirements throughout any migration.
Education
Student and administrative systems that grew organically and need a controlled path forward.
Security, compliance & quality
Security uplift during modernization
We close vulnerabilities inherited from the legacy stack as we migrate, hardening each modernized component instead of carrying old weaknesses forward.
GDPR-safe data migration
Data is migrated with integrity checks, minimization, and access controls in place, so personal data stays protected throughout the transition.
Auditability
Every migration step, cutover, and decommission is documented and traceable, giving you a clear audit trail of how the system changed.
What you get
- System audit and risk map
- Incremental migration plan with milestones
- Modernized, production-ready components
- Automated test coverage for migrated functionality
- Documentation and handover to your team
Technology Stack
.NET (legacy → .NET 8)
Java (legacy → Spring Boot 3)
Azure Service Bus
Event-driven architecture
Database migration tools
Frequently asked questions
No. We modernize around a running system using the strangler fig pattern, shifting traffic to new components gradually. There is no scheduled outage where the business stops.
We never replace the whole system at once. We audit it, sequence the work by risk, and replace components one at a time — each independently verified in production before the next.
It runs in phases rather than a single deadline. We start with an audit and risk map, then deliver modernized components milestone by milestone, so you see value early instead of waiting for one final cutover.
Your data is migrated with integrity checks, access controls, and GDPR safeguards in place. We validate it at every step so nothing is lost or exposed during the transition.
Let's talk about your project
We help organizations design, deliver, and evolve mission-critical information systems. Let's talk about how we can help your project too.
Get in touch