Services

Modernizing an older application without rewriting it from scratch

Angular is the framework a large share of business web applications are built on. Versions age; the application does not have to. I move older ones to the current version while the business keeps running.

What it means

An application written a few years ago does not break all at once. Every change just takes a little longer, bugs start appearing in places nobody touched, and eventually the team works around the application rather than changing it.

Rewriting from scratch sounds like a clean cut. In practice it means months with nothing new shipped, and a real risk of losing the rules that were never written down anywhere and exist only inside the old code.

I work the other way round. AI-assisted tooling lets me get my bearings in an unfamiliar codebase quickly and apply the repetitive, mechanical changes across the whole application at once — that is the part which takes the longest by hand and is easiest to get wrong. Deciding what should change, and how, stays with me.

It makes sense when

the application runs on an older Angular version and the upgrade keeps being postponed
every new feature takes longer than it should
the team avoids areas of the code nobody fully understands any more
a rewrite would mean months without new functionality

What you get

an upgrade to modern Angular — Signals, standalone components
tooling for the repetitive changes, reusable on the next upgrade
a documented migration path your own team can follow
working software and an uninterrupted business throughout

How it works

Map the state
What the application rests on, which parts change most often, and where the trouble actually originates.
Choose the order
The migration is split into pieces that can ship on their own, so the benefit shows up while the work is still running.
Automate what can be automated
Tooling applies the repetitive edits across the codebase; the manual work is reserved for places that need a judgement call.
Hand the team the new version
The new patterns are written down, so the team keeps building on them once the engagement ends.

Where you can see it

ELISA Web application for customs declarations. Major tasks included upgrading from Angular 9 to 18 and refactoring the codebase. tSM A modular microservices platform designed for orchestrating and automating complex operational and business processes in the telecommunications sector and related industries. QMS A client-server system that manages the queue management for banks, post offices, hospitals and other facilities.

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