I will integrate third party apis into your nodejs backend

M
mitosip
M
mitosip
Dmitrii O
integrate third party apis into your nodejs backend
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integrate third party apis into your nodejs backend

About this gig

Need your app to talk to a payment provider, CRM, shipping service or any other external API? I connect it to your Node.js backend so it keeps working when the other side doesn't.


I'm a senior backend engineer with 5+ years of experience. I've integrated third-party APIs in production, including handling authentication, errors and retries.


What I deliver:

- Typed TypeScript client for the API

- Authentication (API keys, JWT, OAuth2)

- Error handling, retries with backoff, rate-limit handling

- Request logging and clear error messages

- Optional: queue-based processing (RabbitMQ, BullMQ, SQS)

- Documentation and handover


Stack: TypeScript, Node.js, NestJS, PostgreSQL, Docker.


How it works: send me the API docs and what you need, I confirm scope and timeline, then deliver with full source code.


Not sure which package? Message me first.

  • Expertise

    • Debugging
    • Performance
    • Security
    • Databases
    • Testing procedures

  • Programming language

    • TypeScript

  • Backend framework

    • Express.js
    • Fastify
    • NestJS
    • Node.js

Get to know Dmitrii O

Dmitrii O

Senior Software Engineer

  • FromGermany
  • Member sinceMay 2026

  • Languages

    English, Russian, German
I am a backend engineer with over 5 years of experience building production systems in TypeScript, Node.js, and Rust. I specialize in event-driven architecture, PostgreSQL at scale, and AWS/Kubernetes deployment. I have a proven track record of owning services end-to-end, from architectural design to long-term operation and partner integrations.

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