Modernize the stack — without a freeze.
We modernize legacy code in place — strangler-fig migration, framework upgrades, dependency replacement, and gradual replacement of the old — while feature work keeps shipping. No big-bang rewrite, no quarter-long freeze: the product stays live and the roadmap keeps moving the whole time.
The full rewrite is the most expensive way to stand still.
A rewrite sounds like progress and feels like one for a while — but it throws away years of accumulated knowledge, the edge cases and quiet business rules baked into code that already works. While the new system is being built, the old one still needs feeding, so you pay for two products and ship features on neither. Most rewrites overrun badly; some never reach parity at all. Modernizing in place is the unglamorous alternative that actually works: move one capability at a time behind a routing layer, verify it, switch it over, and delete the legacy piece once it carries no traffic — all while the product stays live and the roadmap keeps moving.
The old stack has started to cost you.
Each symptom has the same fix — modernize in place, in reversible steps, without ever taking the product down.
- 01
Your stack is two or more majors behind
We close the gap one major at a time, shippable between every hop.
- 02
Hiring is hard because of the stack
A current, supported foundation widens the talent pool again.
- 03
Someone is proposing a full rewrite
Modernize in place instead — cheaper, safer, and never offline.
- 04
Dependencies are abandoned or unsupported
We replace the worst offenders behind a thin internal interface.
- 05
Every upgrade feels too risky to attempt
Reversible steps behind flags — nothing big enough to break the product.
A modern stack, reached one safe step at a time.
Everything needed to modernize in place — without a rewrite and without a freeze.
Current-state inventory
A clear map of the codebase, dependencies, risks, and dead code.
Modernization plan
A sequenced, milestone-driven path built from reversible steps.
Strangler-fig migration
One capability moved to modern code at a time, verified and switched over.
Legacy decommissioning
Old code retired cleanly once its replacement carries the traffic.
One slice at a time, until the old is gone.
- 1Inventory
- 2Plan
- 3Strangle
- 4Replace
- 5Decommission
No flag day and no surprises: inventory the current state, plan a reversible sequence, strangle one capability across to modern code, replace what it depended on, then decommission the legacy piece once it carries no traffic. Repeated slice by slice, the new system grows around the old until there's nothing left to remove.
Catch the stack up — one major at a time.
A stack that's fallen two or more majors behind doesn't get fixed in one terrifying leap. We upgrade across each major in turn — reading the migration notes, replacing removed APIs, fixing what breaks, and running the tests before the next hop — so the application stays releasable between every step. By the end you're on a supported version with security patches flowing and a clear path to staying current.
- Cross one major version at a time
- Releasable between every hop
- Removed APIs replaced, breaks fixed
- Back onto supported, patched versions
Grow the new around the old.
A thin routing layer goes in front of the legacy system, then capabilities move to modern code one at a time behind it. Each migrated piece is verified and switched over while everything else keeps running on the old code — often parallel-run and compared first to prove the behaviour matches. There's no day when everything changes at once; the new system simply grows until the legacy parts carry no traffic and can be deleted.
- A routing layer in front of the legacy system
- One capability migrated at a time
- Parallel-run and compared before cutover
- No big-bang flag day, ever
Retire the libraries no one maintains.
Abandoned dependencies are a slow-burning risk: no security fixes, no compatibility with newer runtimes, and no help when they break. We inventory them, rank by risk and effort, and wrap the worst usages in a thin internal interface so the swap touches one place instead of the whole codebase. Where no drop-in exists, we adopt the platform or standard-library option, or build the small piece you actually use — rather than carry dead code forward.
- Dependencies ranked by risk and effort
- Usage wrapped behind a thin interface
- Maintained equivalents swapped in
- No dead libraries carried forward
Inventory first; then migrate in reversible steps.
Inventory the current state
We map the codebase, dependencies, risks, and dead code so every decision rests on facts, not guesses.
Plan the sequence
A strangler-fig plan with reversible steps and clear milestones, tackling the highest-risk areas first.
Migrate in increments
Upgrade in place, replace dependencies, parallel-run behind flags — the product shippable at every step.
Cut over and decommission
Switch traffic once the new path is proven, then retire the legacy code it replaced.
Hand over clean
Docs, a current foundation, and a clear path to staying current — handed back to your team.
The old stack is quietly holding everything back.
Your stack is two or more majors behind
Missing security patches, fighting unsupported dependencies, locked out of modern tooling — and the gap keeps widening.
Hiring has gotten hard because of it
Engineers are wary of an unsupported stack, the talent pool is shrinking, and onboarding takes longer than it should.
Someone is pushing for a full rewrite
Before you bet the company on a multi-year do-over, there's a cheaper, safer path that keeps the product live throughout.
Methodical practices, dependable migration.
The things teams ask first.
Modernize it — without the rewrite.
Tell us what you're running and how far behind it is. We'll inventory the current state, propose a sequenced plan, and start migrating in reversible steps — strangler-fig style, behind flags — so the stack gets modern while the product stays live and the roadmap keeps moving.