ThinkDebug
Practical deep dives on software architecture, AI systems, and scaling digital products - drawn from the work we ship.
Incremental replatforming of systems you cannot switch off, without a big bang rewrite.
Systems you cannot switch off, modernised in slices. We strangle the old application a capability at a time, with both versions running side by side until the new one has earned the traffic.
Systems you cannot switch off, modernised in slices. We strangle the old application a capability at a time, with both versions running side by side until the new one has earned the traffic.
What to replace, what to wrap and what to leave alone, with the cost of each stated plainly.
The strangler pattern in practice: new capability alongside old, traffic moved gradually.
Schema and engine migration with both systems reconciled until the cutover is safe.
Putting a clean interface in front of a system you are not ready to replace.
A modern front end against the existing back end, which is often the fastest visible win.
Documenting what the system actually does when the people who built it have gone.
Not sure which approach fits? A 30-minute call usually settles it.
Talk to an engineerMost of our work comes from clients we already shipped for. These are the reasons they give.
Rewrites fail on the parts nobody documented. We move in slices you can verify and reverse.
Traffic shifts gradually, so a problem is a rollback rather than an outage.
We characterise what the system does today, including the bugs people depend on.
The slice with the highest pain is done first, not the easiest one.
Characterisation tests around legacy behaviour, so a change that alters it is caught.
The existing system keeps shipping while modernisation runs alongside.
The parts clients ask about after the demo: who owns the output, who has access to what, and what happens once legacy application modernization is delivered.
Send us the scope and we come back with an itemised estimate - no discovery fee, no obligation.
We have shipped legacy application modernization in these sectors before, so we already know where the regulatory, integration and scale problems tend to hide.
Tell us about your industryERP, MES and shop-floor telemetry connected to the systems that already run the plant.
Payments, KYC and ledgers built to withstand audit.
Fleet, warehouse and tracking systems that stay accurate when volume spikes.
Citizen services and campaign platforms built to procurement and accessibility standards.
Patient portals and clinical tools built to compliance.
Metering, grid data and customer platforms for long procurement cycles.
See the full list and the work behind each one.
Explore all industriesChosen for fit and long-term maintainability, never for novelty.
What the new slices are built on.
Migrated with both sides reconciled.
Running old and new side by side.
Transparent stages, with something you can look at from the second one onward.
What it does now, documented and covered by tests.
Which capability moves first and how it is reversed.
New implementation running alongside the old one.
Traffic shifted with verification at each step.
Turning off the old path only once the new one has earned it.
Documentation for the system your team now owns.
Let's start with you.
Your information stays private. We reply within 24 hours.
Still have a question we have not answered?
Ask an engineer
Tell us what it does and what it is blocking. We will map the first slice worth moving.
Reply within 24 hours. NDA on request. No obligation to proceed.
