Ryz Labs/Hire/FrontendHire senior TypeScript developers who make types work for you
Senior TypeScript engineers from Latin America who design type-safe APIs, migrate JavaScript codebases and work inside your team on US hours.
By the Ryz Labs team · Updated October 2026
When you hire TypeScript developers through Ryz Labs, you get senior engineers who use the type system to prevent bugs, not to decorate code with any. They are vetted, top 1% of the engineers we interview, and they embed in your team with access to your repos and standups. They work within an hour of US time zones.
What our TypeScript developers work on
TypeScript now spans the whole stack, from React components to Node.js services to shared packages in a monorepo. Our TypeScript engineers are most valuable where types cross boundaries: between client and server, between teams, and between your code and the outside world.
- End-to-end type-safe stacks with tRPC, GraphQL Code Generator or OpenAPI-generated clients, so a backend change breaks the front-end build instead of production.
- JavaScript-to-TypeScript migrations: enabling allowJs and checkJs, converting file by file, and tightening strict flags over time.
- Monorepos with pnpm workspaces, Turborepo or Nx, project references, and shared packages for types, UI and utilities.
- Node.js backends on NestJS, Fastify or Express, with Prisma, Drizzle or Kysely for type-safe database access.
- Front-end applications in React, Angular or Vue with typed state, typed routing and typed forms.
- Libraries and SDKs published to npm with clean declaration files, dual ESM and CommonJS output, and good editor autocomplete.
Skills we vet for
- Strict mode habits: strict, noUncheckedIndexedAccess and exactOptionalPropertyTypes, and writing code that passes them without casts.
- Type modeling: discriminated unions for state, branded types for IDs, and making invalid states impossible to represent.
- Generics: constraints, inference from arguments, default type parameters, and knowing when a generic adds clarity versus noise.
- Advanced types: conditional types, infer, mapped types with key remapping, template literal types, and the satisfies operator.
- Runtime validation: Zod, Valibot or io-ts at system edges, and deriving static types from schemas so they never drift.
- Compiler and build: tsconfig options, module resolution modes like bundler and nodenext, project references, and type-check performance in large repos.
- Declaration files: writing .d.ts for untyped dependencies and module augmentation for libraries.
- Testing types and code: Vitest or Jest for behavior, plus expectTypeOf or tsd to lock in public type contracts.
How we vet TypeScript developers
Recruiters source TypeScript engineers across Latin America with real production work behind them. ARC, our in-house ranking system, orders the pipeline so attention goes to the strongest profiles. Each candidate completes a structured NTRVSTA AI interview that covers type design, not just syntax. Recruiters review every candidate before and after, and you receive a curated shortlist. AI scores are advisory only. Humans decide.
Sample interview topics
- Model the state of a data fetch (idle, loading, success with data, error with message) so that reading data in the error state is a compile error. Then write a type guard and an exhaustive switch using never.
- Write a typed pick function that takes an object and an array of keys and returns only those keys, with the return type inferred correctly. Explain the role of const type parameters here.
- An API response is typed with a cast, and a field was renamed on the server. Production broke with no compile error. How would you redesign the boundary with schema validation and generated types?
- Type checking in your monorepo takes four minutes. How do you find out why, and what would you try: project references, skipLibCheck, simplifying deep conditional types, or splitting packages?
- What is the difference between unknown, any and never, and how does structural typing allow two unrelated types to be assigned to each other? When do branded types help?
Ways to hire TypeScript developers
| Option | Best for | Trade-offs |
|---|
| Freelance marketplace | Small typed utilities, quick fixes or one-off integrations | Hard to judge type-design skill from a profile; little continuity after delivery |
| Staffing or recruiting agency | Permanent TypeScript hires onto your payroll | Screens often treat TypeScript as a keyword; placement fees; slow senior searches |
| In-house recruiting | Long-term platform owners with deep context | Senior candidates are in demand everywhere; screening takes engineering time |
| Ryz Labs staff augmentation | Adding senior TypeScript engineers to a product or platform team | Custom quote, scoped per team; your leads own architecture and priorities |
| Ryz Labs dedicated team | A full migration to TypeScript or a new type-safe platform build | Larger engagement; most effective with a defined scope and a clear owner |
Ryz is not the right fit if you want a self-serve marketplace for hourly help or a free trial before talking with anyone. If your team works on European or Asian hours, a global network will match better.
Why hire TypeScript developers from Latin America
Many Latin American engineering teams adopted TypeScript early because they were building for US companies that wanted large, maintainable codebases. The result is a group of senior engineers who have already led migrations, set up monorepos and argued about tsconfig flags in production settings.
Type design is a collaborative job. Shared types between front end and back end only work if both sides agree, and that agreement comes from live discussion. With our engineers working within an hour of US hours and comfortable in English, those design conversations fit inside your normal working day.
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FAQ
Can your TypeScript developers migrate our JavaScript codebase?
Yes. Our engineers have run incremental migrations that keep shipping features while types spread through the code. They typically start at the edges, such as API clients and shared utilities, then tighten compiler flags step by step.
Are your TypeScript engineers front-end or back-end?
Both. We have engineers focused on React or Angular, engineers focused on Node.js with NestJS or Fastify, and many who work across the stack. Tell us which side matters most.
What does it cost?
We give a custom quote, scoped per team. You get a plan, a price and the names of the people who would do the work before you sign.
Who is the contract with, and what time zone do they work in?
You sign one contract with Ryz. Our engineers work with us as independent contractors, and we handle paying them. They keep hours within an hour of US time zones.
Questions we didn't answer? Email info@ryzlabs.com.