Juan Sierra

I design and build backend systems with an emphasis on simplicity, reliability and long-term maintainability. My work ranges from REST APIs and cloud services to infrastructure automation and internal developer tools.

I enjoy turning complex processes into clean, automated solutions. Whether it's building deployment pipelines, developing serverless applications or improving existing systems, I focus on writing software that is efficient, scalable and easy to understand.

Security is part of the way I approach software development. I regularly explore application security, infrastructure hardening and offensive security techniques to better understand how systems can be built to withstand real-world threats.