TypeScript development for safer, more maintainable JavaScript
TypeScript is JavaScript with a type system. It compiles to ordinary JavaScript, so it runs anywhere JavaScript does, but it lets the editor and build tools catch mistakes such as missing fields or wrong argument types before users ever see them.
Types act as living documentation, make refactoring far safer and give developers accurate autocomplete, which matters more as a codebase and team grow. TypeScript works on the frontend with React, Vue, Angular and Svelte, and on the backend with Node.js and NestJS. It adds a compile step and some upfront effort to define types, which can feel slow on a tiny script or throwaway prototype. For almost any product intended to last, we use it by default.
What we build with TypeScript
- Frontend applications in any major framework
- Node.js and NestJS backends
- Shared types between frontend and API
- Gradual migration of JavaScript codebases
- SDKs and internal libraries
TypeScript questions
Can we move an existing JavaScript project to TypeScript?
Yes. TypeScript can be adopted file by file, so we usually enable it alongside existing code and tighten the rules gradually without stopping feature work.
Does TypeScript slow the application down?
No. Types are removed at build time and the output is plain JavaScript, so there is no runtime cost.
What are the main benefits of TypeScript for a business?
Fewer bugs reach users because many errors are caught while code is written, and changes are safer because the compiler flags everything affected. Over the life of a project this lowers maintenance effort.
Can TypeScript be used on both frontend and backend?
Yes. TypeScript works with React, Vue, Angular and other frontend frameworks as well as Node.js backends, so types for shared data such as API payloads can be defined once and used on both sides.
Does TypeScript replace testing?
No. Types catch mistakes in how data flows through the code, but tests are still needed to check business logic and behaviour. The two complement each other.
How strict should our TypeScript configuration be?
For new projects we enable strict mode from the start, as it provides most of the value. For migrated codebases we tighten strictness gradually so the team is not blocked by thousands of errors at once.
Can TypeScript types be generated from our API?
Yes. Types can be generated from an OpenAPI specification, GraphQL schema or database schema, so frontend code stays in sync with the backend and breaking changes are spotted at build time.
Does TypeScript make hiring harder?
No. TypeScript is widely used across the JavaScript ecosystem and most professional JavaScript developers are comfortable with it. Typed code also helps new developers understand an unfamiliar codebase faster.
How do you avoid overusing the any type?
We treat any as a last resort, prefer unknown with proper checks, and use linting rules to flag untyped code in reviews. Validating external data at the boundaries keeps types trustworthy throughout the app.
Can TypeScript work with JavaScript libraries that have no types?
Yes. Most popular libraries ship their own type definitions or have community-maintained ones, and where none exist we write small declaration files for the parts we use.
More frontend technologies
Have a project in mind? Let’s talk.
Tell us what you are building. We reply within one business day with next steps — and we are happy to sign an NDA first.