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Fiverr Pro
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$
USD
I will small API or backend service for your app
Sebastien R
About this gig
Need a fast, reliable API endpoint for your app? I'll deliver a working backend microservice with API key authentication, clean error handling, and source code ready to deploy on your cloud.
What you get:
- 1 endpoint with your business logic, deployment-ready
- API key authentication (env-managed, no hardcoded secrets)
- Input validation and clear error handling
- TypeScript source code with deployment README
17+ years of backend engineering, Ph.D. in Software Engineering, currently running a platform serving tens of billions of requests per month across multiple clouds.
For multiple endpoints, full user login, or complex integrations, message me first to scope a custom offer.
Get to know Sebastien R
Sebastien R
Director of Engineering
- FromCanada
- Member sinceMay 2026
Languages
English, French
Director of Engineering and Cloud, Ph.D. in Software Engineering (ÉTS, 2013), 17+ years building production backends.
Past achievements include a 50% cloud cost reduction and the migration of a monolith serving tens of billions of requests per month to microservices. Focus today: backend services, multi-cloud architecture, DevOps, and AI integration (Claude, OpenAI, MCP agents).
Creative, efficient solutions for maintainable, state-of-the-art systems. Easy to work with, committed to quality, happy to help.
FAQ
What do I need to provide to get started?
Your business logic spec (what should the endpoint do), your cloud account (Cloudflare or AWS), and the API key value you want to use. I send a clear requirements form when you order so nothing is missed.
What does "API key authentication" mean exactly?
One HTTP endpoint protected by a header-based API key check (Authorization: Bearer your-key). The key lives in your environment variables, never in the code. This is not a full user login system. For OAuth, JWT sessions, or user accounts, message me first.
Do I own the code after delivery?
Yes, fully. You receive the complete source code with comments and a deployment README.
What about support after delivery?
The Basic includes 7 days of bug-fix support for issues introduced during my work. For ongoing maintenance, new features, or extensions, please contact me for a custom offer or new order.
