Frontend
TypeScript
TypeScript-First Teams That Eliminate Runtime Errors.
TypeScript engineers who treat the type system as a product feature, not a chore. Our developers design type-safe architectures across frontend, backend, and shared packages — catching entire categories of bugs at compile time. We work with product and platform teams across the United States, Germany, Netherlands, and the UK, with 4–6 hours of daily CET overlap and GDPR-compliant development workflows.
Use Cases
What we build with TypeScript.
Full-Stack Type-Safe APIs
End-to-end type safety from database schema to UI component using tRPC, Zod, and Prisma. A single type change propagates across server, client, and validation layers instantly — no more mismatched API contracts. We've built type-safe API layers for fintech platforms in London and SaaS products shipping from Berlin.
Monorepo Architecture
Turborepo and Nx-powered monorepos with shared TypeScript packages for types, utilities, and UI components. Build caching, incremental compilation, and dependency graph–aware CI pipelines that only test what changed. Delivered for multi-product companies in Amsterdam, enterprise teams in New York, and fast-growing startups across the DACH region.
SDK & Library Development
Published TypeScript libraries with precise generic types, builder patterns, and exhaustive inference. Declaration maps, dual CJS/ESM outputs, and auto-generated API docs from TSDoc comments. We've authored client SDKs for payment processors in Stockholm and developer tooling companies in San Francisco.
Schema-Driven Development
OpenAPI, GraphQL, or Protobuf schemas as the single source of truth, with auto-generated TypeScript types, client code, and validation. Contract-first development that keeps backend and frontend teams in Frankfurt, Madrid, and distributed US offices aligned without manual type synchronization.
Migration from JavaScript
Incremental TypeScript adoption in large JavaScript codebases — starting with strict config, adding types file-by-file using codemods, and progressively tightening compiler options. Zero-downtime migration that doesn't block feature work. Completed for enterprise codebases with 500k+ lines for companies in Paris and Chicago.
Developer Tooling & CLI Apps
Type-safe CLI tools, code generators, and internal developer platforms built with TypeScript. Commander or oclif for CLI structure, Zod for argument parsing, and AST manipulation via ts-morph for code generation. Built custom toolchains for platform engineering teams in Copenhagen and DevEx teams in Austin.
Expertise
How we work with TypeScript.
Advanced Type System Patterns
We leverage conditional types, mapped types, template literal types, and recursive generics to build APIs that guide developers at the type level. Discriminated unions for state machines, branded types for domain primitives, and const assertions for configuration objects — types that document intent and prevent misuse.
Compiler Configuration & Strict Mode
Every project runs strictest TypeScript: strict, noUncheckedIndexedAccess, exactOptionalPropertyTypes, and verbatimModuleSyntax. We configure path aliases, project references for monorepos, and incremental builds that keep tsc fast even in large codebases with hundreds of packages.
Runtime Validation & Type Guards
Zod, Valibot, or ArkType schemas that unify compile-time types with runtime validation. Custom type guards, assertion functions, and branded types that bridge the gap between typed code and untyped external data — API responses, form inputs, environment variables, and webhook payloads.
Build Tooling & Module Systems
We configure tsup, unbuild, or custom Rollup setups for dual ESM/CJS output. Declaration file generation, source maps, and tree-shaking-friendly exports. For monorepos, we set up internal packages with proper TypeScript project references and workspace protocols that resolve without build steps during development.
Type-Safe Database & ORM Layers
Prisma, Drizzle, or Kysely with inferred types that flow from schema definition to query results. Migration workflows, seed scripts, and repository patterns — all fully typed. EU-deployed databases get the same type-safe query layer with connection pooling configured for GDPR-compliant data residency.
Why us
Why TBI for TypeScript.
Instant Onboarding, Zero Ramp-Up
Our TypeScript engineers have worked across strict-mode codebases, monorepos, and full-stack type-safe stacks. They review your tsconfig, folder structure, and coding conventions before day one — first PR typically lands within 2 days, not 2 weeks.
AI-Augmented Development
TypeScript's type system makes AI tools dramatically more effective. Our engineers use Cursor and Copilot with TypeScript's inference as a guardrail — AI generates code, the compiler verifies it. This feedback loop accelerates development while maintaining strict type correctness across the codebase.
US & EU Timezone Coverage
Operating from IST (UTC+5:30), we share 4–6 hours daily with Central European teams and 3–4 hours with US Eastern. Code reviews land before your Berlin team's standup; PRs are ready for your New York team's afternoon merge window. Continuous velocity across hemispheres.
GDPR-Compliant Workflows
Data Processing Agreements signed with every EU client. Our TypeScript code follows privacy-by-design — typed schemas enforce data minimization, branded types prevent PII leakage across boundaries, and we deploy to EU-region infrastructure when data residency is required.
FAQ
Common questions.
What does it cost to hire a dedicated TypeScript developer offshore?
Dedicated TypeScript engineers start at $5,000/month for full-time engagement. Senior engineers specializing in type system design, monorepo architecture, or full-stack tRPC stacks range from $6,500–$9,000/month. In the US, equivalent TypeScript talent costs $150,000–$200,000/year; in the EU (Germany, Netherlands), €85,000–€130,000/year. Our pricing delivers the same caliber at a fraction of the overhead.
How fast can a TypeScript developer start contributing to our project?
2–3 days to first PR. We pre-match engineers to your stack — your tsconfig strictness level, framework (Next.js, Nest, Fastify), ORM, and monorepo tooling. They clone the repo, run the build, and review open issues before the engagement starts. Onboarding is a formality, not a bottleneck.
How do your engineers handle TypeScript in large monorepo setups?
We use Turborepo or Nx with TypeScript project references for incremental builds. Shared packages export typed interfaces consumed by apps without a build step in development. CI pipelines leverage dependency graphs to only type-check and test affected packages. We've managed monorepos with 50+ packages and sub-minute CI times.
How do you ensure GDPR compliance in TypeScript projects?
At the type level: branded types for PII fields, typed middleware that enforces consent checks, and Zod schemas that strip unnecessary data at API boundaries. At the process level: signed DPAs, EU-region deployments (AWS eu-central-1, eu-west-1), and engineers trained on GDPR principles relevant to data handling in code.
What's the timezone overlap with US and European teams?
Our engineers work from IST (UTC+5:30), overlapping 4–6 hours with CET and 3–4 hours with US Eastern. We schedule deep work outside overlap and use shared hours for reviews, pairing, and planning. For time-sensitive milestones, engineers shift hours to maximize coverage with your primary timezone.
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