In my work, I combine engineering depth with a business and product view, where big-picture thinking and attention to detail complement each other. I like to dig deeper, ask questions, and focus on essence instead of filling my work with noise.
If you have a problem that requires this kind of approach to solve, I'm available to work with you → https://rkochanowski.com
In addition to open-source projects, I'm building online apps:
- https://hiker.at - (2026) AI weather research tool that helps hikers interpret detailed forecast data for planning outdoor activities in the Alps and across Europe. Built as an LLM chat with tool calling. Optimized for low-cost usage through prompt caching and a compact forecast data format. Stack: TypeScript, Node.js, LangChain, React, Next.js
- https://rechtina.at - (2025) A legal AI app, free and open to the public, where commercial tools are expensive and aimed at lawyers. Built with RAG and reranking, deployed as a real production system, and kept cheap to run by relying on smaller, cost-efficient models. Stack: Java, Spring Boot, Spring AI, PostgreSQL, TypeScript, React, Next.js
Some public projects are available on my GitLab account:
- https://gitlab.com/rafal-qa/git-analyzer - (2022) Temporal coupling analysis on Git repository.
- https://gitlab.com/rafal-qa/spring-cloud-stream-saga - (2022) Project demonstrating where distributed transactions work and where they break down. Stack: Java, Spring Boot, Spring Cloud Stream, Kafka
- https://gitlab.com/rafal-qa/climate-manager-reactive - (2023) Project evaluating reactive architecture in a setup beyond a single service. Stack: Java, Spring Boot, Spring WebFlux, MongoDB, RabbitMQ