Tarun worked on backend and CI/CD improvements across the projectdiscovery/nuclei-templates and projectdiscovery/utils repositories, focusing on maintainability and reliability. He unified Windows template signing workflows by centralizing signing logic and enabling on-demand resigning, which streamlined release processes and improved security compliance. In projectdiscovery/utils, Tarun modernized error handling APIs by refactoring error management and simplifying error traces, while also enhancing URL path encoding and decoding for better correctness and code cleanliness. His work, primarily in Go, Bash, and YAML, included robust testing for network read timeouts, reflecting a thoughtful approach to code quality, maintainability, and developer experience within complex systems.