Samuel de Souza Santana 👋

Senior Backend Developer & Tech Lead, focused on scalable architectures, microservices, performance, and software engineering best practices. I have experience leading technical teams, defining product strategies, and reducing infrastructure costs, always with a systemic vision and value-driven delivery approach. I began my journey during my undergraduate studies, working on full-stack freelance projects, which gave me a complete perspective of the development cycle — from conception, technology selection, and data modeling to delivery and maintenance of production systems. Currently, I lead the technical side of a large-scale application handling over 200 million daily requests and thousands of active users, where I apply concepts such as DDD, CQRS, hexagonal architecture, distributed caching, workers, and messaging to ensure high availability, scalability, and optimized cost. I am passionate about improving processes, automating workflows, and applying design patterns that make systems more efficient, testable, and sustainable. I believe technology is as much about solving real problems with technical elegance as it is about building strong and collaborative teams. Keywords for search & recommendations: backend developer, tech lead, software architecture, microservices, node.js, nestjs, ddd, cqrs, cloud optimization, scalability, performance, leadership, system design, event-driven architecture, high-load systems, redis, docker, postgresql, aws, gcp