Open Source Engineer

Role overview Build and steward a portfolio of public software packages and command-line tools, taking projects from early implementation through stable releases. The work combines engineering with open-source maintenance and clear public communication, so users can understand, adopt, and contribute to the software without needing private guidance.

Responsibilities - Develop and maintain public packages and command-line tools through their release lifecycle. - Keep the public project catalogue accurate, including project status, purpose, and what can be shared as evidence. - Maintain repositories by managing issues, reviewing outside contributions, and keeping releases and project information organized. - Write and update READMEs, design notes, changelogs, and other public explanations of how the software works and why decisions were made. - Assess when experiments are ready for public release and communicate their limitations honestly. - Support external users and contributors as projects gain a community.

Requirements - Experience building developer-facing software such as tools, command-line interfaces, SDKs, or libraries. - Ability to take projects from an initial commit to reliable releases that can handle real users and unclear inputs. - Experience maintaining repositories, handling external pull requests, and deciding what is ready to ship. - Strong written communication and a habit of explaining technical decisions publicly. - Ability to maintain multiple small projects with consistent upkeep. - Work samples or a track record of publishing software or technical writing.

Nice to have - Experience with tools for AI agents, agent frameworks, protocol libraries, or developer command-line tools. - Experience growing a user base or contributor community around a project. - A sustained practice of publishing through a blog, newsletter, changelog, or talks. - Portuguese for internal coordination.

Benefits and work setup - Remote-first, with at least four hours of Central European Time overlap on working days. - Contract or full-time engagement, with a rolling start coordinated after fit is confirmed. - Occasional in-person sessions at a Portugal hub. - Public-facing writing is in English.