Gabriel Trzimajewski

I build backend systems that scale. Over the past 5+ years I've cut query times by 97%, halved infrastructure costs, and reduced deploy times by 80% — working across distributed architectures, cloud infrastructure, and platform engineering.
Most recently I've been working at banking scale: allocated to Bradesco on an internal observability and log-processing platform, inside a regulated environment where audit, compliance, and traceability requirements shape the architecture. Before that I led a B3 (Brazilian stock exchange) integration API handling ~100k requests/day for ~10k monthly active users.
I'm self-taught and genuinely obsessed with system design: how systems fail, how they scale, and how to make them easier to reason about over time. I work mainly with Java, Spring Boot, Kafka, and AWS, and I'm equally comfortable in TypeScript/Node.js, Go, and C#/.NET with Entity Framework Core when the problem calls for it.
I also work in applied AI at the application and infrastructure layer — LangChain, the AI SDK, and Claude Code, including Agent Skills and MCP servers.