~30%
of engineering capacity spent maintaining legacy systems instead of building new value.
Forrester, 2024
Products & Platforms
Legacy systems, modernised without the rewrite scare.
Refactor, replatform or rebuild, whichever your codebase actually needs. We assess what you have, design a migration path your team can execute, and modernise incrementally so business users feel improvements, not outages.
Modernise the system without freezing the business.
Every "let's rewrite from scratch" project sounds clean in the kickoff. Two years later, the new system is half-finished, the old system can't accept the new compliance change, and the team is firefighting both. We work differently. Honest assessment first: what to refactor, what to replatform, what to actually rebuild. Strangler-pattern migrations so the new system grows alongside the old without a big-bang switchover. Real test coverage retrofitted into the legacy where it matters. And a phased plan with measurable improvements at each phase, so the board sees progress every quarter.
How we engage
Our way of working with you
What we actually do on every engagement, regardless of stack, model or scope.
- 01Map the real risk
We start with the business risk, not the code smell.
Workshop with your team to map what the system does, what is actually painful, what blocks the next business move. You leave with a prioritised backlog ranked by business risk, not by aesthetic preference.
- 02Define "good" upfront
Success is measurable before code is written.
We agree on what "modernised" means: deployment frequency, lead time, MTTR, incident rate, cost per feature. So at handoff we can prove value, not argue about it.
- 03Work alongside
Senior engineers in your team, not a separate squad.
We work next to your engineers, the ones who know where the bodies are buried. Knowledge transfers both ways, instead of being lost in a handover doc at the end.
- 04Ship visible improvements
Something users feel in every phase.
Each phase delivers something users feel: a slow query fixed, a deployment unblocked, a flow rewritten. No "big-bang launch in 18 months" without value along the way.
- 05Plan our exit from day one
Your team owns it the day we leave.
Updated docs, runbooks, decision records and observability. Built so the team who maintains it knows why the new bits look the way they do.
By the numbers
Legacy debt is invisible until it is not. Then it shows up everywhere.
Most organisations underestimate the drag legacy systems put on the rest of the business. The data is hard reading.
70%
of digital transformations fail to meet their objectives. Usually due to execution, not strategy.
McKinsey, 2023
$1.5T
annual global cost of technical debt across enterprise IT, and growing.
McKinsey, 2023
5×
longer to ship a change in organisations with weak practices vs. those with strong ones.
DORA, 2023
What you get
An honest plan, an incremental migration and a system the business can keep running on while you modernise it.
An honest legacy audit
Codebase, dependencies, infrastructure, team practices, business risk. Where the pain actually lives and what it costs you to leave it there.
Refactor, replatform or rebuild: the right call for each part
Not every legacy needs a rewrite. We tell you what to refactor in place, what to replatform, what to actually replace. And we tell you why.
Strangler-pattern migrations that do not break the business
New system grows alongside the old. Traffic moves over piece by piece, with rollback paths. No big-bang switchovers, no months of dual-running guesswork.
Test coverage retrofitted where it matters
Characterisation tests around the legacy code we touch. The refactor is safe and the migration has a safety net.
Modern CI/CD wrapped around the existing system
Preview environments, automated tests, observability. Deployments stop being a Friday-afternoon event.
Cloud-native foundation when it earns its keep
Kubernetes, managed services, infrastructure-as-code, where they reduce operational drag. We do not cloud-native everything for the sake of it.
Selected work
Recent modernisation projects where we replaced fragility with systems the business could grow on.
What Clients say about us
Vishnu Kaura
Assistant VP Product & Strategy
"Codino is working on creating a product for our company, they have a keen understanding of technology and do not just engage on just accepting my requirements, rather they provide keen insights on improved ways to achieve the same requirement. Through our association, my organization has launched our product successfully with many of our customers complimenting us on the design and stability of the product and all kudos to the Codino team for helping us achieve this praise. I would definitely recommend Codino to others in search for the right team for their technology implementation."
Axisrooms
Tomasz Naumowicz
CEO
"Codino seamlessly integrated into the client's team and delivered high-quality work, achieving a successful launch and generating recurring revenue for the client. The team delivered on time and was responsive, adaptive, and efficient at using GitHub. Their expertise and readiness were impressive."
Alpaqa Studio
How we deliver
From audit to a modernised system, without a year of dual-running pain.
- 01
Audit
Codebase walk-through, dependency map, team interviews. We score each part of the system on business risk, change cost and modernisation ROI.
- 02
Plan
Phased migration roadmap. Refactor vs. replatform vs. rebuild call for each part. Acceptance criteria, rollback paths and a measurable improvement target per phase.
- 03
Migrate
Strangler-pattern execution. New system grows alongside the old. Traffic moves over incrementally, with telemetry and rollback at every step.
- 04
Stabilise
Old system decommissioned safely, new system observability tuned, team trained, docs and runbooks transferred. We step out with the system measurably healthier.
What changes when modernisation actually lands
Talk about your legacyEngineering stops firefighting the legacy
Pages drop, on-call quiets, the team gets back to shipping features instead of debugging the same incident every month.
The business stops waiting on IT
Compliance changes, new pricing, new market. The system can absorb the next business need instead of blocking it.
Deployment becomes routine
From quarterly release marathons to daily deploys with confidence. Lead time and MTTR move in the right direction, measurably.
Cloud spend stops surprising the CFO
Right-sized infrastructure, FinOps practices and cost-per-feature visibility. Finance stops asking the same question every month.
Where modernisation lands first
Sectors where legacy systems carry the most business risk, and where a careful migration pays back fastest.
Financial services
- Mainframe and monolith decomposition
- Risk and compliance engine modernisation
- Trading and operations platform replatforming
- Customer-facing portal rebuilds
Application modernization, explained
Honestly. Most legacy code does not need a rewrite; it needs a strangler pattern and disciplined incremental change. We rebuild only where the architecture is genuinely incompatible with where the business is going, and we tell you which parts those are.
We do not do big bangs. Strangler pattern by default: the new system grows alongside the old. Traffic moves over piece by piece with rollback paths at every step. By the time the old system is switched off, it is already empty.
We characterise. Tests around the existing behaviour (even if it is weird) before we change anything. Documentation rebuilt from code and runtime traces. We do not pretend we understand what we do not. We make it understandable before we touch it.
Yes, that is the norm. We bring senior engineers alongside your team, share the modernisation playbook and transfer knowledge as we go. By the time we step out, your team has the muscles to keep modernising on their own.
EU-region by default and a migration plan that maintains compliance throughout, not just at the end. Lineage, access controls and PII handling stay correct at each phase, so an audit during the migration passes the same way it did before.
Why Codino
- 10+ years modernising production systems in regulated industries.
- Senior teams. Every engagement led by engineers who have lived through the rewrites that did not work.
- EU-based with EU data residency and GDPR-compliant delivery by default.
- Strangler-first. Incremental migration that survives contact with the running business.
- Honest assessment. We tell you what to refactor, what to replatform and what to rebuild, with the trade-offs.
- We design our exit. Your team owns the modernised system the day we leave.
Let's Talk About Your Project
Get In Touch
Maciej Roman|CEO & Co-founder