Senior Backend Full Stack Developer

Backend-focused Full Stack Developer with experience building scalable REST APIs, authentication systems, payment flows, queue-based workers, and cloud-ready microservices. Have shipped production software in SaaS, AI, and EdTech, handling API design, DB architecture, performance optimization, and integrations (payments, storage, auth, analytics, etc.). Looking for full-time or contract backend roles (Node/NestJS or Go preferred). Open to remote-first teams globally.