Arno Deville focused on improving developer experience and project maintainability across the status-im/nim-web3 and status-im/nimbus-eth2 repositories. He enhanced onboarding by updating documentation and shell scripts, clarifying development environment setup, and standardizing workflow instructions in Bash and Markdown. In nim-web3, his work reduced setup time for new contributors and improved documentation quality. For nimbus-eth2, Arno managed dependency upgrades by integrating the latest nim-web3 ABI encoder and decoder, ensuring compatibility and reproducible builds. His contributions emphasized clear documentation, robust dependency management, and ecosystem alignment, addressing foundational engineering needs rather than user-facing features or bug fixes during this period.