antithesis - Senior/Staff Engineer - Hegel

• Experience using property-based testing (PBT). Experience with Hypothesis https://hypothesis.readthedocs.io/en/latest/ would be slightly preferred but experience with any other PBT library is fine too. • We lean heavily on AI assistance in developing Hegel, with a lot of human review and care to maintain quality. You don’t need to have any experience with such workflows, but you should be comfortable with the idea of using them. • Familiarity with at least one, ideally both, of Python and Rust. • Willingness to work in a variety of languages. • Expert-level in at least one language that you would be keen to be “tastemaker” for a Hegel implementation. • Having maintained an active open source library is a strong plus. • You can see most of the tech in question on https://github.com/hegeldev. • hegel-core is Python, and hegel-rust is our most mature client library. We also have go, typescript, C++, and OCaml (some not yet public). We’re not immediately planning to support more, but if there’s some language you’d be keen to add support for feel free to let us know. • We are heavy Claude Code users. • Antithesis more broadly are heavy Nix users, and it would be a plus to be familiar with that, but because Hegel integrates with existing language package managers we are not actually heavy users of it on this team in particular. • Our team is composed of people with a variety of backgrounds: standard engineering degrees to philosophy degrees; big-tech backgrounds to scrappy startups. But we have at least one common skill: everyone on the team, including managers, is held to the same high standard of engineering competency. In addition, we value in-person work for its value in building trust and sharing knowledge and mentoring each other. • Note: This is an 5 days a week in-office job in London, UK