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.
Trusted by engineering teams at
Procedure is a TypeScript development company that builds type-safe, maintainable applications across frontend, backend, and full-stack engagements for enterprises that refuse to ship runtime errors to production. Since 2016, Procedure's engineers have delivered TypeScript-first platforms for clients including Setu, Pine Labs, and Last9, spanning payment dashboards, observability tools, and real-time APIs. The team pairs TypeScript with React and Node.js for end-to-end type safety from database to UI.
TypeScript Development Track Record
Why TypeScript for Your Business
Catch bugs before your users do. Ship with confidence at scale.
Fewer Production Bugs
TypeScript catches type errors at compile time, not in production. Teams that adopt TypeScript report 15-25% fewer bugs reaching QA, which compounds into faster release cycles and lower support costs.
Safer Refactoring
When your product evolves, TypeScript's compiler tells you exactly what breaks. Engineers refactor confidently instead of tip-toeing through fragile JavaScript, making large codebases manageable long-term.
Full-stack Consistency
TypeScript runs everywhere JavaScript runs: React frontends, Node.js backends, serverless functions. One language with one type system across your entire stack eliminates an entire class of integration bugs.
Faster Onboarding
TypeScript's type annotations serve as living documentation. New engineers understand function signatures, data shapes, and API contracts by reading the code instead of hunting through wikis.
Industry Standard
Google, Airbnb, Stripe, and Slack standardized on TypeScript. Over 98% of the top 1,000 npm packages ship TypeScript definitions. You're adopting the default, not the exception.
TypeScript Development Services
Type-safe applications across frontend, backend, and full-stack.
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.
Industries We Build TypeScript Applications For
Domain knowledge that accelerates delivery and reduces risk.
Financial Services & Fintech
Type-safe trading platforms, payment APIs, and regulatory reporting systems. TypeScript's strict typing catches financial calculation errors at compile time across full-stack codebases.
SaaS & Technology
Multi-tenant platforms with shared type definitions between frontend and backend. TypeScript monorepos with Zod validation ensure API contract consistency across microservices.
Healthcare & Life Sciences
HIPAA-compliant patient portals and clinical data systems. Type-safe HL7 FHIR integrations and strict null checks prevent data handling errors in regulated healthcare environments.
Education & EdTech
Learning management systems and assessment platforms with complex state. TypeScript's type inference reduces bugs in real-time collaboration features and grading logic.
E-commerce & Retail
Product catalog APIs, checkout flows, and inventory systems. End-to-end type safety from database queries through API responses to storefront rendering.
Government & Enterprise
Large-scale internal tools and citizen-facing portals. TypeScript's refactoring support and self-documenting interfaces help distributed teams maintain complex codebases.
Is TypeScript Right for Your Project?
Type safety is a spectrum. Here's when to go all in.
Codebases with 3+ developers
Types serve as living documentation. New developers read the interfaces and understand the data flow without digging through implementation. Refactoring across a large codebase goes from terrifying to routine.
APIs and shared contracts (frontend + backend)
Shared types between your React frontend and Node.js backend catch mismatches at compile time, not in production. One schema change propagates everywhere instantly.
Long-lived applications (2+ year lifespan)
Code you wrote six months ago is code you forgot. TypeScript's compiler catches the errors your memory won't. Maintenance costs drop significantly on typed codebases.
Enterprise and regulated environments
Static analysis satisfies compliance requirements that dynamic languages can't. Type coverage is measurable, auditable, and enforceable in CI pipelines.
For quick scripts, prototypes, or solo projects where speed outweighs long-term maintenance, plain JavaScript is often faster to ship. For data science and ML workloads, Python is the better tool. TypeScript adds friction that pays off at scale but can slow you down on throwaway work. We'll tell you which fits.
We’ve shipped 100+ TypeScript projects. We know where it helps and where it gets in the way.
TypeScript vs JavaScript: When You Need What
We use both. Here's how we decide.
TypeScript
Best for
Large codebases, team projects, long-lived applications, shared API contracts
Why
Static types catch bugs at compile time, serve as living documentation, and make refactoring safe. IDE support (autocompletion, inline errors, go-to-definition) is dramatically better with types. Adoption is near-universal for serious JavaScript projects.
We use it when
Your project has more than one developer, will be maintained for over a year, or shares types between frontend and backend. The upfront cost of types pays for itself within weeks on any non-trivial project.
JavaScript (plain)
Best for
Quick prototypes, scripts, small utilities, solo projects with short lifespans
Why
Zero configuration, instant feedback, no compile step. When you need to ship a script or validate an idea in hours, TypeScript's setup overhead isn't worth it. Every TypeScript developer still writes plain JavaScript when the situation calls for it.
We use it when
You're writing a one-off script, prototyping an idea to validate before investing in proper architecture, or building a small utility that won't grow beyond a single file.
The line between TypeScript and JavaScript is thinner than the debate suggests. TypeScript compiles to JavaScript. The question isn't which language, it's how much type safety your project needs right now. We default to TypeScript for production code and use plain JavaScript for scripts and prototypes. For the backend, we pair TypeScript with Node.js or Next.js.
Our Approach to TypeScript Development
Types are architecture decisions, not annotations you add later.
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.
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.
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.
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.
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 TypeScript Projects
Working software every sprint, not just progress updates.
Codebase Audit and Architecture (1-2 weeks)
We 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.
Type Foundation and Tooling (1-2 weeks)
tsconfig.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.
TypeScript Development & Iteration (6-16 weeks)
Sprint-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.
Validation and Hardening (1-2 weeks)
Full 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.
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.
Our TypeScript Stack
Every tool earns its place. Here’s what we ship with and why.
| Layer | Tools | Why |
|---|---|---|
| Language | TypeScript 5.x strict | Strict mode catches entire categories of bugs at compile time. Non-negotiable on our projects. |
| Framework | React, Next.js, NestJS, Angular | React/Next.js for frontends, NestJS for backend structure, Angular for enterprise apps |
| Build | Vite, Turbopack, SWC | Sub-second HMR with Vite, Turbopack for Next.js, SWC for fast transpilation |
| ORM / Query | Prisma, Drizzle, TypeORM | Prisma for type-safe queries and migrations, Drizzle for edge runtimes, TypeORM for legacy codebases |
| Database | PostgreSQL, MongoDB, Redis | Postgres for relational data, MongoDB for document workloads, Redis for caching and queues |
| API Style | REST, GraphQL, tRPC | REST for public APIs, GraphQL for frontend flexibility, tRPC for end-to-end type safety without codegen |
| State Management | Zustand, Redux Toolkit, TanStack Query | Zustand for simple state, Redux Toolkit for complex flows, TanStack Query for server state |
| Forms | React Hook Form, Zod | Performant forms with schema-based validation. Zod schemas shared between client and server. |
| Testing | Vitest, Playwright, Jest | Vitest for unit tests, Playwright for E2E, Jest for legacy projects and Node.js services |
| Hosting | Vercel, AWS, Cloudflare | Vercel for Next.js, AWS for containers and serverless, Cloudflare for edge-first apps |
| CI/CD | GitHub Actions, Docker | Automated type checking, tests, and deployments on every merge |
| Monitoring | Sentry, Datadog | Error tracking with full source map support, APM for performance bottlenecks |
TypeScript is not optional on our projects. Strict mode, no any escapes, shared Zod schemas between frontend and backend. The type system is the first line of defense, not an afterthought.
Testimonials
Trusted by Engineering Leaders
“What started with one engineer nearly three years ago has grown into a team of five, each fully owning their deliverables. They've taken on critical core roles across teams. We're extremely pleased with the commitment and engagement they bring.”
“We've worked with Procedure across our portfolio, and the experience has been exceptional. They consistently deliver on every promise and adapt quickly to shifting project needs. We wholeheartedly recommend them for anyone seeking a reliable development partner.”
“Procedure has been our partner from inception through rapid growth. Their engineers are exceptionally talented and have proven essential to building out our engineering capacity. The leadership have been thought partners on key engineering decisions. Couldn't recommend them more highly!”
“What started with one engineer nearly three years ago has grown into a team of five, each fully owning their deliverables. They've taken on critical core roles across teams. We're extremely pleased with the commitment and engagement they bring.”
Discuss Your TypeScript Project
Whether it’s a new build, JavaScript migration, or improving type safety, we’re happy to talk through your situation.
Schedule a CallNo sales pitch. Just an honest conversation.
What you get
- Engineers with 3+ years of production TypeScript (strict mode, not just type annotations)
- Full-stack capability: TypeScript frontend (React/Next.js) + backend (NestJS/Node.js)
- Experience with tRPC, Prisma, Zod, and modern TypeScript tooling
- Same timezone overlap (India-based team, flexible to US working hours)
- No recruiting overhead - engineers are vetted, onboarded, and managed
Hire TypeScript Developers
Senior TypeScript engineers who ship type-safe code from week one.
Dedicated Developer
Engineers with 4+ years of production TypeScript experience across React, Node.js, and full-stack applications. Deep understanding of generics, conditional types, and compiler internals. Not developers who learned TypeScript last month.
Ongoing development or migration work, 3-month minimum engagement
Team Pod (2-4 Engineers + Lead)
A self-contained team that owns full feature delivery in TypeScript. Architecture, implementation, testing, and deployment covered. Mixed team of leads and senior engineers staffed based on project needs.
Full application builds or large-scale migrations, 6-month minimum engagement
Project-Based Delivery
Fixed-scope engagement with clear deliverables, timeline, and budget. Defined type contracts, agreed milestones, and transparent pricing.
Defined scope with clear deliverables, scope-dependent
Starting at $3,500/month per developer for full-time dedicated engagement.
Talk to Us About Your TeamReady to Discuss Your
TypeScript Development Services Project?
Tell us about your TypeScript project. Whether it's a new build, migration from JavaScript, or improving type safety across your stack, we'll discuss architecture and give honest next steps.
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TypeScript Development FAQ
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.