Contributed to the jorenn92/Maintainerr repository by enhancing API performance and reliability through improved caching strategies and rule evaluation logic. Focused on optimizing external API interactions by refining cache hygiene, implementing TTL-based caching for metadata, and ensuring only valid object responses were stored, all using TypeScript and Node.js. Addressed correctness in rule evaluation and YAML export by enforcing explicit operators and safeguarding against data loss. Additionally, improved code readability and maintainability in bramstroker/homeassistant-powercalc by standardizing text and fixing typos. Demonstrated a methodical approach to full stack development, emphasizing maintainability, performance, and robust unit testing throughout the work.