5+ years of commercial experience in backend development with Node.js 2+ years of experience in fintech, digital banking, payments, or financial infrastructure 3+ years of experience working in product companies Strong knowledge of JavaScript/TypeScript and modern Node.js ecosystem Experience with relational and NoSQL databases (PostgreSQL, MongoDB, Redis) Understanding of distributed systems, microservice architecture, and event-driven communication Experience with message queues (e.g., RabbitMQ, Kafka) and caching strategies Familiarity with Docker, Kubernetes, CI/CD pipelines Ability to work with high-load and latency-sensitive systems Knowledge of testing frameworks (Jest, Mocha) and code quality tools