Talent
Founder-vetted, TypeScript-first
We write TypeScript in strict mode by default. Every engineer is founder-vetted against a high bar, so you get people who catch bugs at compile time instead of shipping them to users.
TypeScript Development Services
TypeScript Development Services Type-Safe Web, API & Full-Stack Engineering
TypeScript applications, migrations, and full-stack systems built by the team behind procedure.tech, Setu, KredX, and Last9.
5dTo first deployment
3+yAverage partnership
98%Client retention
TypeScript Development Services · React 19
Trusted by engineering teams at
SetuPine LabsESPNKredXTreeboTimelyTurtlemint
9+
Years in production engineering
50+
Senior engineers
75+
Clients served
98%
Client retention rate
Why TypeScript for your business
Type safety that keeps your codebase maintainable as it grows.
Reliability
Bugs caught before production
Static types catch whole classes of errors before code runs. Runtime failures in production cost far more to fix than the checks that prevent them, and your users never see the difference.
Full-stack
One language, end to end
TypeScript spans your React frontend and your Node.js backend. Shared types mean the API and the UI never drift out of sync, and your team hires against a single skill set.
Pod
A pod matched to your project
We assemble a self-contained pod around your build, whether that is a greenfield app or a migration off plain JavaScript. The right mix of engineers, not a generic bench.
Delivery
A delivery lead on every pod
Each pod ships with an experienced delivery lead who owns scope and timelines. You get working software every sprint and one accountable point of contact.
TypeScript Development Services services
From SPAs to enterprise dashboards — built to ship fast and stay maintainable.
TypeScript Migration
Moving JavaScript codebases to TypeScript, incrementally. We start with strict: false, add types to critical paths first, then tighten the compiler until the codebase is fully strict. Your app stays live throughout. No productivity freeze, no big-bang rewrite. We have migrated codebases with 200K+ lines of JavaScript to strict TypeScript without a single day of downtime.
Enterprise TypeScript Applications
Large-scale TypeScript applications with NestJS, React 19, and Next.js 16. Monorepos with Turborepo, shared type packages, and strict compiler settings across every workspace. The type system becomes your documentation and your safety net. Runtime errors caught at build time, not by your users.
Type-Safe APIs with tRPC, Prisma & Zod
End-to-end type safety from database to UI. Prisma generates types from your schema, tRPC or GraphQL Codegen carries them through your API layer, and Zod validates runtime inputs at every boundary. A change to your database schema surfaces type errors in your React components instantly. No more silent contract mismatches between frontend and backend.
Full-Stack TypeScript (React, NestJS, Prisma)
One language across your entire stack. React 19 or Next.js 16 on the frontend, NestJS or Fastify on the backend, Prisma or Drizzle for data access, all in TypeScript. Your team shares types, utilities, and domain logic across every layer. Fewer context switches, faster debugging, simpler hiring.
Library and SDK Development
TypeScript libraries and SDKs with proper declaration files, generics, and discriminated unions. Published to npm with semantic versioning, automated changelogs, and dual ESM/CJS output. We build packages that feel native to TypeScript, not JavaScript wrappers with .d.ts files bolted on.
TypeScript Tooling & Code Quality
ESLint with typescript-eslint, Vitest for unit and integration tests, Playwright for end-to-end coverage. Strict compiler options enforced via CI. We configure tsconfig.json properly once so your team never debates compiler settings again. Every PR gets type-checked, linted, and tested before merge.
Our approach
Types are architecture decisions, not annotations you add later.
01
Strict From Day One
Every new TypeScript project starts with strict: true. No any types in production code. The compiler is your first line of defense against runtime errors, and we configure it to catch everything it can.
02
Types as Documentation
Well-designed TypeScript types communicate intent better than comments. When a function accepts a discriminated union instead of a string, the type system tells every developer what values are valid without reading a wiki page.
03
End-to-End Type Safety
Types that stop at the API boundary are half the value. We use Prisma, tRPC, and Zod to carry type safety from the database through the API to the UI. A schema change surfaces errors everywhere it matters, instantly.
04
Incremental Adoption Over Perfection
For migrations, we prioritize progress over perfection. Start with loose types on legacy code, strict types on new code, and tighten gradually. Your team ships features while the migration happens in the background.
05
TypeScript Tooling That Enforces Standards
We do not rely on code review to catch type issues. CI pipelines run the TypeScript compiler, ESLint with typescript-eslint, and test suites on every pull request. Standards are automated, not aspirational.
How we deliver
Working software every sprint — not just progress updates.
01
Codebase Audit and Architecture
1-2 weeksWe assess your existing codebase, identify type coverage gaps, and define the migration or build strategy. You get a technical proposal covering compiler configuration, module boundaries, shared type packages, and CI/CD integration. For greenfield projects, we establish the TypeScript architecture before writing application code.
02
Type Foundation and Tooling
1-2 weekstsconfig.json configured for your project's needs. ESLint rules set. Shared type packages created if using a monorepo. For migrations, we establish the incremental adoption path and convert critical modules first. For new builds, the type system and toolchain are locked before feature development begins.
03
TypeScript Development & Iteration
6-16 weeksSprint-based TypeScript development with strict type checking on every pull request. Your team sees working features shipped continuously. For migrations, we convert module by module while the application stays live. Type coverage tracked and reported weekly.
04
Validation and Hardening
1-2 weeksFull TypeScript strict mode enabled and verified. No any types in production code. Vitest and Playwright test suites passing. Bundle analysis completed to confirm TypeScript compilation produces optimized output. Performance benchmarks met.
05
Handoff & TypeScript Team Enablement
—Complete documentation covering TypeScript conventions, compiler configuration decisions, and type architecture. Your team owns the codebase and can extend it without us. Optional support retainer available, but no lock-in.
Hire TypeScript Developers
Senior TypeScript engineers who ship type-safe code from week one.
Model 01
Dedicated Developer
When type safety can't be an afterthought, you get an engineer with 4+ years of production TypeScript across React, Node.js, and full-stack. Fluent in generics, conditional types, and compiler internals, not someone who picked it up last month.
Best for
Choose this when ongoing development or a migration needs a type-safe hand · 3-month minimum engagement
Model 02
Team Pod (2-4 Engineers + Lead)
When a full build or migration needs owning, a pod delivers it end to end in TypeScript. Architecture, implementation, testing, and deployment covered, with leads and senior engineers staffed to your scope.
Best for
Choose this when an application build or migration needs full ownership · 6-month minimum engagement
Model 03
Project-Based Delivery
When the scope and type contracts are defined, you get a fixed price against them: clear deliverables, agreed milestones, and transparent pricing before work begins.
Best for
Choose this when scope and type contracts are already defined · scope-dependent
Let's build
Ready to Discuss Your TypeScript Project?
Talk directly with engineers, not sales. We will assess fit and give honest next steps.
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Frequently Asked Questions
TypeScript development costs depend on project scope. A JavaScript-to-TypeScript migration for a medium codebase (50K-100K lines) typically runs $20,000 to $60,000. A full-stack TypeScript application with 15-25 screens costs $40,000 to $120,000. Enterprise platforms with monorepo architecture, shared type packages, and multiple teams can run $120,000 to $350,000+. Procedure offers a free architecture consultation to scope your specific project.