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●Technology Expertise

TypeScript
Development.

Expert TypeScript development with deep production experience. From architecture decisions to performance optimization, I help teams build systems that scale.

typescript developertypescript consultantjavascript to typescript migrationtype-safe api developertypescript architectfrontend typescript expert

●Expertise Level

TypeScript developer since version 2.0 (2016), witnessed the evolution from optional typing to strict mode becoming standard. Expert in advanced type system features: conditional types, mapped types, template literal types, and type inference. Built type-safe codebases with 500K+ lines and zero 'any' types in strict mode.

●When to Use TypeScript

Any JavaScript project larger than a single file—the tooling benefits pay off immediately

Teams with more than one developer where code contracts prevent integration bugs

Projects with complex data structures (API responses, database models, state shapes)

Refactoring legacy JavaScript codebases where types reveal hidden bugs

Building libraries or SDKs where consumers need accurate type definitions

Full-stack projects where sharing types between frontend and backend eliminates entire bug classes

Long-lived codebases where future maintainers need to understand data flow

●Best Practices

Enable strict mode and all strict flags: strictNullChecks, noImplicitAny, strictFunctionTypes

Use type inference where possible—don't annotate variables when TypeScript can figure it out

Prefer interfaces for object shapes, type aliases for unions, functions, and complex types

Use const assertions (as const) for literal types and readonly arrays

Leverage utility types: Partial<T>, Required<T>, Pick<T, K>, Omit<T, K>, Record<K, V>

Use discriminated unions for state machines and API responses with different shapes

Implement branded types for IDs to prevent mixing user IDs with post IDs at compile time

●Common Pitfalls to Avoid

Using 'any' as an escape hatch—it spreads virally, defeating the purpose of TypeScript

Not enabling strict mode from the start—retrofitting strictNullChecks to a large codebase is painful

Over-engineering types with excessive generics—readability matters more than type gymnastics

Forgetting that TypeScript types are erased at runtime—use Zod/io-ts for runtime validation

Using enums when const objects or union types would be simpler and more tree-shakeable

Not understanding type narrowing—TypeScript can infer types after conditionals, use it

Ignoring strict function types—bivariance in function parameters causes subtle bugs

●Ideal Project Types

Large-scale web applications
Node.js backend services
React component libraries
CLI tools and developer utilities
Shared packages in monorepos
API clients and SDKs

●Complementary Technologies

ESLint with @typescript-eslint (linting)
Zod (runtime validation with type inference)
Prisma (database types generated from schema)
tRPC (end-to-end type safety)
Vitest (TypeScript-native testing)
ts-node or tsx (TypeScript execution)

●Real-World Example

Case Study

Claude Pilot's codebase demonstrates TypeScript's power for developer tools. The Electron app shares types between main process, renderer, and tRPC backend—changing a database schema updates types across the entire stack instantly. I implemented branded types for different ID types: type UserId = string & { __brand: 'UserId' }. This catches bugs at compile time where you'd accidentally pass a SessionId to a function expecting a UserId. The tRPC procedures use Zod schemas that TypeScript infers types from: const input = z.object({ sessionId: SessionId }), and the return type is inferred from the procedure implementation. For the memory browser, I used discriminated unions to model different database connections: type Connection = PostgresConnection | MemgraphConnection | QdrantConnection, with each having specific properties. TypeScript narrows the type after checking connection.type, providing autocomplete for database-specific methods. The result: 80% test coverage but honestly the type system catches more bugs than tests do—refactoring is fearless because the compiler validates everything.

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●Ready to Build?

Let's discuss your
TypeScript project.

Whether you're starting fresh, migrating an existing system, or need architectural guidance, I can help you build with TypeScript the right way.

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