Modernise your legacy stack — without stopping the business.
Most modernisation projects fail because they're scoped too big and take too long. We use proven incremental patterns — strangler fig, API decomposition, event-driven decoupling — to move your production system to modern cloud infrastructure while it keeps serving customers.
The right fit
We turn down work that isn't a fit. Here's how to tell.
This engagement works well if…
- —Your legacy system is blocking new feature delivery and the team spends 60–80% of each sprint on maintenance.
- —A compliance audit has exposed architectural debt that must be addressed before your next funding round or enterprise sale.
- —You have internal engineers who will own the modernised system after we hand it off.
- —A competitor has already shipped on modern infrastructure and you need to close the gap without a 12-month rewrite.
This probably isn't us if…
- —You're starting a greenfield product with no legacy system to migrate.
- —You need a fixed-price project with a locked scope. Migration work surfaces unknowns — the engagement model needs to accommodate that.
- —There are no internal engineers who will own the result. We don't want to be your permanent ops team.
How we approach a migration
No big-bang rewrites. Every phase ships something real.
Assessment (1–2 weeks)
We map the system, identify coupling points and risk, and write the migration plan. You get a document you can act on regardless of who does the work.
Target architecture
We agree on the end state: cloud provider, service boundaries, data model, API contracts. We design for the team that has to maintain it — not for a conference talk.
Incremental migration
Strangler-fig or modular decomposition. Each increment is independently deployable. We never leave the system in a half-migrated state that blocks your team.
Cloud cutover
Zero-downtime deployment. Traffic shifted with feature flags or DNS cutover. Rollback plan documented and tested before go-live.
Handoff
Runbooks, architecture decision records, observability dashboards. Your team owns the system — we leave it in better shape than we found it.
What you walk away with
Concrete outputs — not a deck and a handwave.
Migration roadmap
A prioritised plan your board can read and your engineers can execute.
Target architecture doc
Cloud provider, service boundaries, data model, API contracts — documented in ADR format.
Cloud infrastructure
Your account, your keys. We never hold your infrastructure hostage.
CI/CD pipeline
Automated test, build, and deploy for every service we touch.
Observability stack
Logging, metrics, alerting. You know what the system is doing before we leave.
Deployment runbook
Zero-downtime procedures and rollback steps, written for your ops team.
What this looks like in practice
Numbers from real engagements.
15 years
building financial software in North America
60+
microservices shipped for a major US regional bank's mortgage origination
20%
faster origination cycle after the migration
At a major US regional bank, Harsh led engineering on the mortgage origination platform — a high-stakes, high-compliance system where downtime is measured in regulatory risk, not just revenue. The work involved decomposing a monolith into 60+ independently deployable microservices while the system stayed live.
Earlier work at a North American retail giant involved re-platforming e-commerce infrastructure to handle peak retail load without the brittle couplings that caused outages on the old stack. The same methodical, incremental approach applied.
Ready to get a migration plan?
A 30-minute call is enough to scope the first phase. You'll leave with at least one concrete next step — even if we're not the right fit.