01
Type system design
Discriminated unions, generics and branded types used where they prevent real bugs — not type gymnastics nobody else can maintain.
Senior / Staff
Hire senior TypeScript engineers for full-stack codebases
TypeScript engineers who use the type system to catch mistakes at compile time and validation to catch them at the boundary — and who can move a JavaScript codebase there without freezing feature work.
Role profile
What we look for in a Senior TypeScript Engineer
Seniority and experience are agreed in the proposal, and you interview every engineer before they start. These are the skills that interview should test.
02
End-to-end type safety
Shared types from database to UI through tRPC or generated clients, with Zod validating everything that crosses a trust boundary.
03
Monorepo tooling
Turborepo or Nx with pnpm workspaces, remote caching and package boundaries that keep builds fast as the repository grows.
Typical work
What a Senior TypeScript Engineer typically works on
Examples of the scope this role is hired for. Your statement of work sets the actual deliverables and how they are accepted.
- 01Incremental JavaScript-to-TypeScript migration, raising strictness file by file
- 02Type-safe APIs with tRPC and Zod schema validation
- 03A monorepo sharing types between web, mobile and backend packages
- 04CI type-check gates that block merges on new type errors
Stack and tools
What this role works with day to day. Tell us your stack and we’ll say plainly which parts we can staff.
- TypeScript 5
- tRPC
- Zod
- Turborepo
- Node.js
- React 19
Technology guides
Related service
Custom software developmentA system built around your workflow, shipped in weekly increments — not a rewrite that lands a year late.
How hiring works
Four steps, agreed in writing before anyone starts
01
Tell us the role
The stack, the seniority you need, the hours you want covered, and any certifications the work requires. We reply within one business day.
02
We propose engineers
A written proposal sets out who we'd put forward, their seniority and experience, the scope, and the terms. If we can't staff the role well, we say so.
03
You interview every engineer
Nobody starts on your codebase until you've interviewed them and agreed. Use the skills on the role page as your interview checklist.
04
Working arrangements go in the SOW
Working-hours overlap is agreed for each engagement and written into the statement of work — the shared window, who shifts hours, and how handoffs work outside it.
QuantmHill provides development teams from India for Indian startups and SMEs. Role profiles describe project capabilities; availability is confirmed for your engagement. Our team works on India Standard Time. Project working hours, availability and handoff responsibilities are agreed before kickoff.
Need specific certifications? Tell us at the start and we'll confirm whether we can staff to that requirement before you sign. There are no recruiting fees.
FAQ
Questions about hiring a Senior TypeScript Engineer
Answered the way we would on a call. If yours isn’t here, send it — we reply within one business day.
That is usually the point of the role: React or Next.js in front, Node.js with NestJS or Fastify behind, sharing domain types. The proposal says which side each engineer is strongest on, and the interview is your chance to test both.
Gradually. We enable allowJs and checkJs, convert leaf modules first, and raise strictness flags one at a time with CI holding the line, so feature work continues in parallel.
Related roles
Similar and adjacent roles
Add a Senior TypeScript Engineer to your team
Tell us the stack, the seniority you need and the hours you want covered. We reply within one business day, and you interview every engineer before they start.