Hire TypeScript Developers in the UK

Yes — that is the normal way to do it. We add TypeScript alongside the existing JavaScript, type the shared code and the riskiest modules first, and convert the rest as files are touched. New code is written in TypeScript from the start. You can stop at any point and still have a working, partly typed codebase.

Usually, yes. Many of the bugs TypeScript exists to catch — values that might be undefined, missing cases, wrong argument types — are only reported with strict checks on. On an existing codebase we enable flags one at a time and fix errors area by area, so the team is never faced with thousands of errors at once.

It depends on who owns the API. If both sides are TypeScript in one repository, tRPC or shared Zod schemas give end-to-end types with no generation step. If the API is public or written in another language, we generate types and clients from its OpenAPI definition in CI, so a breaking change shows up as a failed build.

A little while types are being added, then rarely. The payback comes in refactoring and onboarding: editors find every use of a field, renames are safe, and new developers can read the shape of the data instead of guessing it. We keep types pragmatic — no clever generics where a plain interface will do.

TypeScript developer rates at Techsleight Labs start from £20/hour for flexible work and from £2,900/month for dedicated monthly capacity. Fixed-price TypeScript projects are quoted after discovery, once scope, integrations, risks, and timeline are clear.

Most TypeScript engagements start within 5–7 working days of sign-off, and urgent work can sometimes start within 48–72 hours. For larger projects, we first confirm scope, architecture, milestones, and the right senior engineer fit before kickoff. We support UK teams with written updates, planned demos, and timezone-aware handover.

Yes. You can hire a single TypeScript developer, add a small pod with QA and DevOps, or ask us to manage the complete project. We match the model to your current team, delivery pressure, and budget.

Yes. Our hiring pages are built around senior production engineers, not junior bench resources. Every developer is reviewed for commercial project experience, communication quality, code quality, testing habits, and ability to work inside existing teams.

Yes. We often join existing TypeScript projects to fix performance, unblock releases, add features, improve test coverage, or modernise architecture. We start with a codebase review so the first sprint is practical rather than theoretical.

Tell us early. We will look at the cause with you — the brief, the onboarding or the match — and agree the next step together, such as more technical oversight, a different engagement model, or ending the engagement on the notice terms in your contract. The goal is a useful working relationship, not lock-in.