Sylwestereee User

I’m a Full Stack Developer with 10 years of experience designing, building, and supporting secure cloud-based applications using C#, .NET, React, TypeScript, Python, and PostgreSQL in Agile delivery environments. I’ve led end-to-end development of enterprise platforms serving 4.8M users, delivering 22 production releases annually.

I focus on performance and reliability: I reduced API response times from 1.9 seconds to 500 milliseconds across critical workflows by optimizing PostgreSQL queries, caching strategies, and service orchestration. I also owned solution design and CI/CD implementation, including automated testing and debugging to keep deployments stable.

At Meta, I led architecture and development of a cloud-based case management platform across intake, workflow routing, and service delivery. I designed AWS deployment pipelines and DevSecOps controls supporting 22 production releases each year with zero failed deployments, and partnered with product, security, and infrastructure teams to deliver major platform enhancements.

Earlier at Microsoft, I developed customer-facing web applications and internal operations systems that supported millions of users. I improved page load times from 2.8 seconds to 1.0 second, resolved 110 production issues each year, and mentored through code reviews, sprint planning, technical documentation, and AI-assisted development workflows.