Legacy modernization · EonTech

Move the old system
without breaking it.

We turn ageing monoliths into clean, cloud-native services. The migration is staged and reversible. The audit trail stays unbroken. The business keeps running while the foundation is replaced underneath it.

Plan your migration Cloud & DevOps
  • 0 Big-bang rewrites. We migrate in safe, reversible stages.
  • 1:1 Unbroken audit trail across every cut-over.
  • 24/7 Systems that stay live while we move them.

Why now

The cost of standing still grows quietly

Every release on a tangled monolith takes longer than the last. New hires take months to be productive. Security patches stall behind fragile dependencies.

Modernisation is not a luxury project. It is how you keep shipping at a sane pace. We make the change incremental so the risk stays small and the value arrives early.

See our full-cycle build approach

The staged path

Four moves, each provable before the next

We follow the strangler pattern. The legacy system keeps serving until each new piece is proven in production. There is no point of no return.

  1. 01

    Map & instrument

    We trace the real system, not the documentation. Dependencies, data flows, and the risky seams get mapped before anything moves.

  2. 02

    Strangle the monolith

    New services take traffic behind a routing layer while the old code keeps running. We carve out one bounded context at a time.

  3. 03

    Re-platform to cloud

    Each extracted service moves to managed, observable cloud infrastructure. Autoscaling replaces the brittle single box.

  4. 04

    Retire & verify

    Once a path is proven in production, the legacy code is decommissioned. The audit trail spans the whole transition, untouched.

How we control risk

Safe by construction, not by hope

  • Reversible cut-overs

    Every migration step can be rolled back in minutes. No single deploy can take the business down.

  • Shadow traffic

    New services run against live traffic in read-only mode first. We compare outputs before they own a single write.

  • Tech-debt ledger

    We track debt as we go, paying down the items that block change and parking the rest with eyes open.

Common concerns

What CTOs check before committing

  • Will the system go down during migration?

    Our approach targets zero or near-zero downtime. Strangler routing and reversible cut-overs mean the old system keeps serving until the new path is proven.

  • How do you protect the audit trail?

    Events and records stay continuous across every cut-over. Nothing is rewritten in place, so compliance and reporting never see a gap.

  • Do we have to migrate everything at once?

    No. We carve out one bounded context at a time. You can pause, reprioritise, or stop after any stage with a system that still works.

Start with a system you can trust

Send us the architecture you have today. We will map a staged migration and a first reversible step you can ship without holding your breath.

Plan your migration [email protected]