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- Tasks: Build innovative property-based testing libraries and tackle software reliability challenges.
- Company: Join a well-funded tech company redefining software reliability with cutting-edge solutions.
- Benefits: Competitive salary, collaborative culture, and opportunities for professional growth.
- Other info: Dynamic team environment with diverse backgrounds and a focus on mentorship.
- Why this job: Make a real impact on software reliability while working with AI-assisted development.
- Qualifications: Experience in property-based testing and proficiency in at least one programming language.
The predicted salary is between 60000 - 80000 £ per year.
About Antithesis
We've been quietly reinventing how the world thinks about software reliability, and we're just getting started! At Antithesis, we start at the foundations – we run entire software systems inside a deterministic simulation and break them in every way imaginable. Every issue then comes with a perfect reproduction, so you can identify root causes fast instead of spending days trying to recreate what went wrong.
The rise of AI-generated code has made this work more urgent than ever. Agents can write code faster than any human, but speed doesn’t matter much when the output is buggy, stuck in review, or slipping through undetected. The verification bottleneck is real, it’s growing, and solving it is one of the most consequential problems in software right now. That’s what you’d be working on.
We’re well-funded and deeply technical, the kind of place where the hardest problems get the most attention and the best ideas win regardless of who has them. If you want to do work that actually moves the needle on how reliable software can be, keep reading.
About the Role:
This role, on a team based in London, is responsible for building out Hegel, our new family of property-based testing libraries. We are building open source libraries to provide top quality property-based testing in every language, both for the benefit of the community at large, and because it provides a natural on-ramp for potential customers to test their software in Antithesis.
Must have for this role:
- Experience using property-based testing (PBT). Experience with Hypothesis 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.
Nice to haves:
- 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.
The Tech:
You can see most of the tech in question on GitHub. It 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.
The Culture:
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 a 5 days a week in-office job in London, UK.
Senior/Staff Engineer - Hegel employer: Open Source Pledge
Contact Detail:
Open Source Pledge Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior/Staff Engineer - Hegel
✨Tip Number 1
Network like a pro! Reach out to folks in your industry on LinkedIn or at meetups. A personal connection can often get your foot in the door faster than any application.
✨Tip Number 2
Show off your skills! If you’ve got a GitHub or portfolio, make sure it’s up to date. Potential employers love to see what you can do, especially with open source projects.
✨Tip Number 3
Prepare for those interviews! Research common questions for Senior/Staff Engineer roles and practice your answers. We all know that confidence is key when showcasing your expertise.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we love seeing candidates who are proactive about their job search.
We think you need these skills to ace Senior/Staff Engineer - Hegel
Some tips for your application 🫡
Show Your Passion for PBT: When you're writing your application, make sure to highlight your experience with property-based testing. We want to see your enthusiasm for it and how you've used it in past projects. Don't hold back on sharing any cool examples!
Tailor Your CV: Make your CV stand out by tailoring it to the role. Focus on your relevant skills and experiences that align with what we're looking for at Antithesis. A little effort here goes a long way in showing us you're the right fit!
Be Yourself: We love seeing the real you in your application! Don’t be afraid to let your personality shine through. Share your journey, your interests, and what excites you about working with us at Antithesis.
Apply Through Our Website: To make sure your application gets to us directly, apply through our website. It’s the best way to ensure we see your application and can get back to you quickly. We can't wait to hear from you!
How to prepare for a job interview at Open Source Pledge
✨Know Your PBT Inside Out
Make sure you brush up on property-based testing (PBT) concepts and libraries, especially Hypothesis. Be ready to discuss your experience with PBT in detail, including any challenges you've faced and how you overcame them.
✨Show Off Your Coding Skills
Since the role involves working with languages like Python and Rust, be prepared to demonstrate your coding skills. You might be asked to solve a problem on the spot, so practice coding challenges beforehand to keep your skills sharp.
✨Familiarise Yourself with Antithesis
Do your homework on Antithesis and their approach to software reliability. Understanding their mission and how Hegel fits into their vision will show your genuine interest in the company and the role.
✨Be Ready for Technical Discussions
Expect deep technical discussions during the interview. Prepare to talk about your previous projects, particularly any open-source contributions, and how they relate to the work you'll be doing at Antithesis. This is your chance to shine!