TypeScript development services
Strict, end-to-end type safety — including the migrations that get an existing codebase there.
TypeScript's value is not autocomplete. It is that a whole category of production incident becomes a compile error, and that refactoring stops being an act of faith.
We run strict mode from the first commit on new work. On existing JavaScript we migrate incrementally — strict on new files, ratcheting the configuration as coverage improves — so nothing has to freeze while it happens.
TypeScript, specifically.
Can you migrate our JavaScript codebase without stopping feature work?
Yes, that is the normal constraint. Strict settings apply to new and touched files first, with the configuration tightened progressively. Feature delivery continues throughout.
Do types replace tests?
No. Types eliminate shape errors; tests verify behaviour. Both are needed, and the type layer simply makes the test suite smaller by removing the cases that can no longer occur.
Tell us what you are building.
A short conversation is usually enough to tell whether we are the right firm for the problem. If we are not, we will say so and point you somewhere better.