Why we build everything with TypeScript
Engineering Team
When we evaluated technology stacks at Eclipse, we made a deliberate choice: TypeScript would be the primary language across our entire product suite. Frontend, backend, infrastructure tooling, and even some embedded scripting — TypeScript, everywhere we could make it work.
One language across the stack
The biggest advantage is reduced context switching. Engineers can move from frontend to backend to tooling without changing mental models. Types are shared between client and server. Interfaces are the source of truth, not documentation that drifts out of date.
This has made our small engineering team significantly more productive than we would be with a polyglot stack.
Catching errors early
TypeScript's type system catches an enormous class of errors before they reach production. For a team that values reliability, this is invaluable. We run strict type checking in CI, and we treat type errors the same way we treat test failures.
The upfront cost of writing types is repaid many times over in reduced debugging time, easier refactoring, and more confident deployments.
The ecosystem
Beyond the language itself, the TypeScript ecosystem — Node.js, React, Next.js, and the npm package registry — gives us access to the largest software ecosystem in the world. When we need a library, it almost certainly exists and has TypeScript definitions.
For a lean team building multiple products, this leverage is critical. We stand on the shoulders of giants, and TypeScript is the language those giants speak.