Modernize Without Breaking What Works.

We use the strangler-fig pattern for most migrations — we never touch the live system until a replacement module is proven in production. Feature flags let us route 1% of traffic to the new system first, watch metrics, then gradually increase. The old system stays live as a fallback throughout.

It depends on the strategy and system complexity. Lift & shift to cloud takes 4–8 weeks. Strangler-fig modernisation of a mid-size monolith typically takes 6–12 months. We deliver value at every phase — you don't wait until the end to see progress.

Most don't — that's why we start with a code audit. We use static analysis, dependency graphs, and integration tracing to reconstruct what the system actually does. We've successfully migrated systems where the original developers left years ago and no documentation existed.

We run parallel data writes for a period before cutover — both the old and new databases receive the same writes. This lets us verify data integrity before switching read traffic. We never do a big-bang data migration with a maintenance window for production systems.

Every phase of our migration has an instant rollback path. During strangler-fig migration, flipping a feature flag routes all traffic back to the legacy system in under 60 seconds. We test the rollback procedure in staging before each production phase — it's never theoretical.

A lift-and-shift to the cloud typically runs $15k–$40k, while a full strangler-fig re-platform of a mid-size monolith ranges from $80k to $250k depending on lines of code and integration complexity. Most clients recover the cost within 18–24 months through reduced infrastructure bills and faster feature delivery — our average client saves around $180k per year post-modernisation.

Rewrites are the riskiest option and we rarely recommend them — most failed modernisations are big-bang rewrites where spec gaps surface at cutover. For systems that can't go offline we use the strangler-fig pattern to replace modules incrementally, or lift-and-shift first when you just need cloud benefits. We recommend the strategy after a code audit, based on your actual risk tolerance and downtime constraints.