Samuel M.

Senior Backend Developer specializing in Node.js/TypeScript, Rust, Go, and Python, with a focus on distributed systems, high-scale backend architecture, and production performance. Focused on solving backend problems where scalability, reliability, concurrency, and data consistency matter — from designing new services to diagnosing bottlenecks in existing production systems. Production experience includes systems handling 500,000 concurrent WebSocket connections, distributed workflows running thousands of concurrent sagas, and CDC pipelines processing millions of updates daily. Core expertise includes Node.js, TypeScript, Rust, Go, Python, Kafka, Redis/Redis Cluster, PostgreSQL, Cassandra/ScyllaDB, distributed systems, event-driven architecture, WebSockets, gRPC, Kubernetes, Docker, AWS, and GCP. Strong experience with database sharding and partitioning, asynchronous processing, caching, high-concurrency systems, production troubleshooting, observability, and performance/load testing. Best suited for backend projects involving scaling challenges, performance bottlenecks, distributed data, asynchronous processing, real-time systems, or architecture that needs to remain reliable under heavy load. Available for long-term backend development as well as focused architecture and performance engagements.