# Senior TypeScript developers for US teams | Miyagami > Hire senior TypeScript developers for US teams, full-time from €5,600 a month and assessed with AI tools off and on. Shortlist in 3 working days. Source: https://www.miyagami.com/hire/typescript-developers [Home](https://www.miyagami.com/)/ [Hire engineers](https://www.miyagami.com/hire)/ TypeScript developers # Hire TypeScript developers Senior TypeScript developers across frontend and backend who write production code in strict mode and use the type system to surface edge cases before they ship. The assessment checks whether they let types catch what the model missed, as well as whether the code compiles. [Get a shortlist](https://www.miyagami.com/shortlist?role=full-stack-engineers&skills=TypeScript) What we test for What changed about working in TypeScript 01 ### AI code compiles but hides type errors Copilot and similar tools produce TypeScript that passes a quick read but quietly widens types or drops null checks. Engineers now need to check generated code against the schema as well as the screen. 02 ### Strict mode is the minimum bar now Teams running AI-assisted development found that permissive tsconfig settings let generated errors accumulate unseen, so strict and noUncheckedIndexedAccess have become standard on serious projects. An engineer who still reaches for 'any' to silence the compiler is a liability in that workflow. 03 ### Types now document intent as well as shape As codebases grow faster with AI assistance, types have become the primary way engineers communicate constraints to teammates and to the model itself. Engineers who treat them as optional overhead slow down every subsequent generation step. What we test for ## How we assess TypeScript developers Every engineer works through a fundamentals assessment with AI tools switched off and a second assessment with their own agents running. For TypeScript developers, these criteria carry the most weight. Debugging : In the fundamentals assessment, engineers get a TypeScript codebase with a runtime error that a weak type definition let through, and the assessor watches whether they tighten the type or add a runtime guard. AI output verification : In the session with their own agents on, engineers generate a typed API client and then audit it for inferred 'any', missing discriminated unions and incorrect nullability before the code reaches the integration layer. Spec-driven development : Assessors check whether they write or refine the type signatures and interfaces before prompting for implementation, so the type contract serves as the spec instead of prose requirements. [See both scorecards](https://www.miyagami.com/how-we-vet) Cost and timeline Hiring with Miyagami From €5,600 a month - One senior engineer, full-time, at a fixed monthly fee - Employment, payroll and compliance included, no recruitment fee [**Against a senior local hire in your country** See the full pricing comparison](https://www.miyagami.com/pricing#calculator) Timeline 5 days to hire - Three-month minimum - Wrong fit: we replace at our cost [**Get a shortlist in 3 days** Request TypeScript developers](https://www.miyagami.com/shortlist?skills=TypeScript) Roles that use TypeScript [Full-stack engineers A full-stack engineer works across the browser, the API and the database, and can take a feature from a ticket to production without handing it off. TypeScript React / Next.js Node.js / NestJS](https://www.miyagami.com/hire/full-stack-engineers) [Frontend engineers A frontend engineer builds what users actually touch: interfaces, state, performance and accessibility. TypeScript React / Next.js Vue](https://www.miyagami.com/hire/frontend-engineers) [Backend engineers A backend engineer builds and runs the services, data models and integrations a product depends on. Node.js / NestJS Python / FastAPI Go](https://www.miyagami.com/hire/backend-engineers) [Forward deployed engineers A forward deployed engineer is a senior engineer who works closest to the people using the product: your team, your customers and the stakeholders who decide what gets built. TypeScript React / Next.js Node.js / NestJS](https://www.miyagami.com/hire/forward-deployed-engineers) Related reading [### How to review AI-generated code Reviewing AI-generated code changes some of what reviewers look for and keeps the rest. This entry covers both, plus the specific failure modes to check for.](https://www.miyagami.com/resources/articles/how-to-review-ai-generated-code)[### How do you test software you didn't design Standard coverage metrics mislead when you test software you didn't design. This entry explains what engineers should do instead when reviewing AI-generated code.](https://www.miyagami.com/resources/articles/testing-software-you-didnt-design)[### What is a coding agent A coding agent is an AI system that writes, edits, runs and debugs code autonomously across multiple steps, without a human directing each action.](https://www.miyagami.com/resources/articles/what-is-a-coding-agent) ## Questions about hiring TypeScript developers How senior are the TypeScript developers you place? They're senior, with 6+ years' experience on average, and they've shipped and maintained production systems in TypeScript. Every one has passed both assessments, and you see both scorecards before you meet them. How do you test TypeScript specifically? In the first assessment, they work in a real TypeScript codebase with AI tools off, handling strict mode violations, narrowing union types and debugging type errors under pressure. The second assessment adds their own AI agents, and the assessor checks whether generated code gets properly typed before they accept it. How quickly can a TypeScript developer start? You'll have a shortlist within three working days of briefing us, and you can hire within five working days of the brief. The timeline is the same for frontend, backend and full-stack roles. What does a TypeScript developer cost? You pay a fixed monthly fee from €5,600 per full-time engineer, with employment, payroll and compliance included and no recruitment fee. The pricing page compares it with the all-in cost of a senior local hire in your country. Engagements are full-time with a three-month minimum, and if a placement doesn't work out, we replace them at our cost. Do they work in our tools and repositories or bring their own? They work in your codebase, repositories, CI pipeline and communication tools from day one. They bring their own AI tooling into your workflow where it fits, and all their work runs inside your environment. Let's talk ## Get a shortlist within three days You share the roles and the stack in a short form or a thirty-minute call. Within three working days you get named senior engineers to review, each with both scorecards, and you can hire within five. [Get a shortlist](https://www.miyagami.com/shortlist) Reviewed on **Clutch** 42 reviews [ISO 27001 Certified](https://trust.miyagami.com/) Book thirty minutes with Dale The calendar is provided by HubSpot, which sets its own cookies. Load it here, or book on HubSpot's page. [Open booking page](https://sales.miyagami.com/meetings/dwesdorp)