TypeScript Consulting

Fewer runtime errors mean happier users. JavaScript's loose typing is a constant source of production bugs — undefined is not a function, cannot read property of null, etc. TypeScript eliminates entire categories of these errors. The result is an application that crashes less and behaves more predictably.

Self-documenting APIs. TypeScript types serve as living documentation. When a developer (or another team member) looks at a function signature, they immediately understand what data it expects and what it returns. This clarity reduces miscommunication and bugs caused by assumptions — and that means a more polished product.

Fearless refactoring. The ability to confidently rename, restructure, and reorganize code is one of the most underrated productivity boosts. TypeScript's type checker tells you immediately if a change broke something. Your team can clean up technical debt without fear — and that means a healthier, more maintainable codebase over time.

Better collaboration through shared types. When the frontend and backend both use TypeScript, you can share type definitions between them. API contracts are enforced by the compiler, not by documentation that's always out of date. This eliminates a huge class of integration bugs that plague multi-team projects.

Frontend applications. TypeScript is the de facto standard for modern frontend development. Whether you're using Preact, React, Vue, Angular, or Lit, TypeScript provides the type safety that makes complex UIs maintainable. Component props, state shapes, and event handlers are all checked by the compiler.

Node.js backends. TypeScript runs on the server too. Express, Fastify, NestJS, and other frameworks have excellent TypeScript support. Sharing types between frontend and backend eliminates the most common source of API integration bugs — mismatched expectations.

Shared type definitions. We maintain shared type packages that define the contract between frontend and backend. These types are used by both the server (for request validation) and the client (for response handling). The compiler ensures they stay in sync.

Static site generation. Astro, the framework we use for this very site, has first-class TypeScript support. Components, content collections, and integrations all benefit from type checking — ensuring our marketing site is as reliable as our applications.

The choice between TypeScript and plain JavaScript is increasingly straightforward. In 2026, TypeScript is the default choice for virtually all non-trivial projects. But there are still cases where JavaScript is the right call.

Start with TypeScript by default. For any project that will be maintained, extended, or worked on by more than one person, TypeScript's benefits far outweigh the minimal overhead. The type checking alone prevents enough bugs to justify the choice.

Consider strictness levels. TypeScript's strict mode catches the most bugs but requires more type annotations. We typically recommend starting with strict mode and relaxing specific rules only when there's a clear productivity reason.

Invest in good type design. The quality of your types directly impacts the quality of your code. Well-designed types make correct code easy to write and incorrect code hard to write. Bad types — overly permissive any types, for example — defeat the purpose of TypeScript entirely.

Don't forget about runtime validation. TypeScript types are erased at compile time — they don't provide runtime type checking. For API boundaries and user input, you still need runtime validation (Zod, for example). We use both: TypeScript for compile-time safety and Zod for runtime validation of external data.