When you build alone or in a small team, context switching is the tax you pay for wearing every hat. TypeScript does not remove that tax, but it lowers it: the same mental model travels from API contracts to UI forms to mobile screens.
I like NestJS for clear modules and testable services. I like Next.js when the web product needs routing, server concerns, and a path to production that is not a science project. I like React Native when the mobile app should speak the same product language, not become a separate company inside the company.
What shared typing buys you
- Fewer “stringly typed” API surprises between client and server.
- Refactors that fail in CI instead of in a customer’s session.
- Onboarding that teaches one type system, not three dialects of guesswork.
None of this is ideology. If a domain needed another tool tomorrow, I would use it. Until then, TypeScript remains the shortest path between idea and dependable software for the products I ship.
Key takeaways
What to remember
- Shared types cut coordination tax.
- Nest + Next + RN keep one product language.
- Depth beats logo collecting.
