Ersi Xhangoli

I’m a Backend Developer specializing in API development, database management, and server-side programming. At Motomtech (July 2021 — Present), I developed and optimized RESTful APIs using Node.js and NestJS, improving system responsiveness through efficient routing, middleware optimization, and seamless third-party service integration.

I also design scalable microservices architecture with NestJS and RabbitMQ, using asynchronous, message-driven workflows to decouple service boundaries and improve resilience and horizontal scalability. I architect modular backend systems with dependency injection, Guards, Interceptors, and custom decorators, and I strengthen performance with PostgreSQL and MongoDB using indexing, query tuning, schema normalization, and aggregation pipelines. My approach leans on async/await, Promises, and event-driven architectures to keep API performance stable under high concurrency, alongside logging and observability to proactively identify and resolve bottlenecks.