I will build custom backend apis and integrate third party services

V
vincentyip86
V
vincentyip86
Vincent Yip

About this gig

Need reliable backend APIs for your product?


I help businesses build custom backend APIs, implement business logic, and integrate third-party services.


With 14 years of software engineering experience and 7 years in technical leadership, I have worked on large-scale platforms serving millions of daily active users and systems integrating thousands of games.


What I can help with:

  • Custom REST API development
  • Backend modules and business logic
  • Database design and integration
  • Third-party API and service integration
  • API debugging, testing, and documentation
  • Improving existing backend services


My focus is on clear requirements, maintainable code, and reliable deliverynot just making an endpoint work.


Before ordering, please share your requirements, preferred technology stack, and any relevant documentation. I will review the scope and confirm whether I can support your project.

Let's build a backend that works reliably.

Get to know Vincent Yip

Vincent Yip

Senior Backend Engineer System Architecture 14 Years Experience

  • FromChina
  • Member sinceNov 2026
  • Languages

    Chinese, English
14 years backend engineer, built systems serving 5M+ DAU and $10M+ monthly revenue. I help startups: • Build production-grade Go microservices (REST APIs, gRPC) • Deploy on Kubernetes with Docker and CI/CD • Optimize performance — 60% infrastructure cost reduction • Design distributed systems for high concurrency • Refactor legacy codebases with DDD architecture • Set up observability: monitoring, alerting, tracing Tech: Go, Python, PostgreSQL, Redis, Kafka, gRPC, K8s, Docker, AWS/GCP Async with US/EU time zones. Clean, tested code with clear docs.