Abinet A.

NestJS Developer | Node.js, TypeScript, PostgreSQL, SaaS

Need a reliable NestJS/Node.js backend developer who can work on an existing production system — not just build another CRUD API? I help SaaS companies and product teams build, scale, and improve production backends using NestJS, Node.js, TypeScript, PostgreSQL, and microservices. 🏆 Top Rated | 100% Job Success 💰 $40K+ earned on Upwork ⏱ 4,600+ hours delivered My focus is backend systems where architecture, reliability, and maintainability actually matter. I can help you with: • NestJS & Node.js backend development • REST API design and third-party integrations • TypeScript architecture and codebase modernization • PostgreSQL, MySQL, data modeling, and database design • Multi-tenant SaaS architecture and tenant isolation • Microservices and modular backend architecture • WebSockets, real-time systems, and event-driven workflows • Docker and production backend infrastructure • AI/LLM integrations, RAG, embeddings, and vector search • Fintech and algorithmic trading backends Some of the systems I've worked on: → Production SaaS platform — 2,300+ Upwork hours Owned backend development for an e-learning SaaS platform built with NestJS, TypeScript, PostgreSQL, microservices, and cloud infrastructure. → Enterprise Industrial IoT platform Worked on a multi-tenant platform for European manufacturing clients, including NestJS/TypeScript backend services, tenant isolation, data boundaries, and operational applications. → Algorithmic trading platform Built backend systems for automated trade execution, real-time market-data processing, strategy logic, and backtesting. I’m particularly useful when you already have a product and need someone who can understand an existing codebase, make sound backend decisions, and take ownership of features without creating unnecessary technical debt. If you're building or scaling a NestJS/Node.js application, send me a message with a quick description of your product, current stack, and the backend problem you're trying to solve.