I will build a rest API backend or integrate any API into your app

I build backend APIs that actually hold up in production not just code that

returns 200 on your machine.

WHAT YOU GET

- A REST API in Node.js + Express (TypeScript available on request)

- PostgreSQL with Prisma, or your existing database

- Input validation on every endpoint, so bad data never reaches your DB

- Proper HTTP status codes and error responses your frontend can rely on

- Full source code, yours to keep, no lock-in

THIRD PARTY INTEGRATIONS

Stripe, Telegram, OpenAI/Anthropic, Google APIs, CRMs, webhooks if it

has documentation, I can integrate it. Webhook endpoints include signature

verification and retry handling, not just a URL that accepts POST.

NOT INCLUDED

I do backend only no frontend, no design, no HTML/CSS. If you need UI work,

you'll need a separate seller. I'd rather say this up front than disappoint

you later.

Message me before ordering with what you're building. I'll tell you honestly

whether it fits a package or needs a custom offer.

The service is provided by a minor under an account owned by the parents

of Artem and managed by them, in accordance with Fiverr's policy for

users aged 13-17.