Frontend / UX Engineer (Senior)

About Maihem

At Maihem, we’re on a mission to ensure AI benefits all of humanity by making it safe, aligned, and controllable in all real-world applications. As AI systems grow more autonomous, the risks of security vulnerabilities, unintended behaviors, and systemic failures present urgent challenges—yet most organizations lack the tools to test and deploy these systems adequately.

We’re changing that. Our AI-powered simulation platform lets companies stress-test and optimize the performance, security, and safety of their agentic AI systems. A CTO of a $10bn+ enterprise called Maihem “the most advanced AI testing and evaluation system we’ve seen.” That enterprise is now a customer, using our technology to build their agentic workforce responsibly.

Founded by AI researchers with PhDs from Oxford and Imperial College and backed by Y Combinator and a $6M seed round, Maihem is building a future where AI serves all of humanity safely. As our Senior Frontend/UX Engineer, you’ll play a crucial role in shaping this future, ensuring that our tools are intuitive, impactful, and ready to power the most advanced AI systems. Please note that this role requires you to be with us in person, 5 days/week.

Your Role at Maihem

As Maihem’s Senior Frontend/UX Engineer, you will directly design and build the products around the most advanced AI simulation and stress-testing platform in the world. In particular, you will own the design and development of the Maihem webapp and website, including significant autonomy and responsibility in this senior role.

You will have previously demonstrated the ability to build world-class software products.

Your qualifications

• 3+ years of experience developing web applications

• 1+ years of experience in UX design for products and websites

• Excellent communication skills and team player mentality

Required skills

• Javascript

• React/ Next.js

• Tailwind

• Figma

Nice to have

• Worked at a fast-paced startup before

• Experience with shadcn/ui components

• Experience with basic Python

• Experience with basic AI and LLMs

• Webflow or similar tools for building websites

• Experience with SQL

Benefits

Competitive compensation: GBP 70-100K + performance bonus + equity

• Private health insurance

• Pension contributions

• Free lunch

• Free gym

• Nice office in central London

• Curiosity allowance for books, courses, museum memberships, library cards, ...

Note regarding in-office requirements: Our team works out of the office 5 days/week and is excited about this part of our energetic startup culture. Please only apply if you'd be excited too.