This isn't just another AI job.

This is a once in a career opportunity for you to help build an AI-enabled IDE, alongside the likes of Cursor, Windsurf and Github Copilot.

I’ve spent over 10 years building machine learning products across startups, gaming, and ad tech. At hx, we’re applying AI in a way that actually changes how an entire industry works. Our models are already in the hands of real users, helping actuaries and underwriters make faster, smarter decisions every day.

I was lucky enough to join my first startup early (employee #32), it went public at $16B. I came to hx because I see the same kind of potential here. Big, meaningful problems, crazy smart teammates, real impact.

We’re building the world’s first domain-specific AI peer-programmer for insurance—think GitHub Copilot, but trained in actuarial science and regulation. You’ll help us reinvent how insurers code, model risk, and make billion-dollar decisions. Like AWS changed how devs develop and deploy software, we’re doing the same for insurance - with you building the AI that makes it possible.

At hx, we’re not just riding the AI wave - we're shaping it. Our mission is bold: to redefine how the insurance industry builds software and makes decisions, powered by generative AI. Our team sits at the bleeding edge of applied machine learning, LLMs technologies, blending deep domain expertise with state-of-the-art models to solve problems no one else is tackling.

Right now, we're focused on two groundbreaking products, and that’s just the start! One is a powerful data ingestion engine that uses advanced LLMs to turn unstructured insurance documents into actionable insights. The other is our crown jewel: a domain-specific AI peer-programmer that lives inside our custom IDE - think Copilot, but with a PhD in actuarial science. Both are live, evolving fast, and already changing how actuaries work day-to-day.

What sets us apart is a culture of invention: small team, big ambition, zero bureaucracy. This is applied AI with teeth. We move fast, experiment often, and ship real value. Our stack spans OpenAI, Hugging Face, Python, React, AWS - but tools are just the start.

As a Senior Engineer in our AI team, you'll architect and engineer AI-driven products from scratch, directly addressing complex problems with no established playbook. You’ll design and implement innovative solutions such as specialised coding copilots within our proprietary development environment.

Working within a startup-like team at the heart of hx, you’ll have significant autonomy to lead groundbreaking experiments and quickly see your innovations deployed to solve real-world insurance challenges.

• First, you'll dive deep into our AI systems, architecture, and product suite and get to know the unique problems we’re solving through hands-on onboarding. By the end of the month, you'll have shipped your first meaningful contribution.

• During second month you’ll take ownership of a scoped feature or improvement within one of our core products in hx AI - you’ll be trusted and encouraged to push changes into production and see real-world impact.

• By the end of your third month, you’ll be a fully embedded member of the team, helping shape our roadmap, contributing to architectural decisions, and collaborating across hx to evolve our AI capabilities as we scale. In no time you’ll be solving problems no one’s cracked yet.

You thrive on impact. You’re the kind of person who:

• Loves shipping real-world products that millions rely on

• Gets energised by messy, real-world data and building robust AI solutions from it

• Owns projects end-to-end: prototype to production, experimentation to scale

• Sees the intersection of cutting-edge AI and high-stakes business problems as your playground

• Is proactive and has self-directed approach to tackling ambiguous problems, consistently delivering high-impact results.

Your toolkit includes:

• Extensive experience developing and deploying production-grade ML and AI systems at scale in cloud environments.

• Deep Python expertise - you live in PyTorch, Hugging Face, and friends

• Experience with distributed systems and modern MLOps best practices

• A self-starter mindset - you spot high-leverage opportunities and run with them

• Strong communication skills - you make the complex sound simple

Bonus points if you bring:

• Hands-on experience with LLMs in production, especially for NLP

• Familiarity with regulated domains (insurance, fintech, etc.)

• A footprint in the community: open source, writing, talks, or contributions

• Exceptional Growth: Profitable and rapidly scaling (2× ARR YoY). Backed by $73M Series B funding to support bold innovation

• Top-Tier Team & Culture: Collaborative, high-performing culture with 80+ engineers across London and Warsaw. Driven by ownership, curiosity, and kindness

• Meaningful Impact: Adopting cutting-edge solutions. Focus on solving real problems that revolutionise the field. Being challenged and testing ideas quickly.

• Own it – Take initiative and stay accountable

• Push boundaries – Stay ambitious, adaptable, and bold

• Keep growing – Learn through building and data

• Do right – Act with integrity, kindness, and responsibility

• Think deeply – Center customers in every decision

• Salary + Equity (stock options)

• £5,000 for individual and group training and conference budget

• Mental health and therapy provision via ⁠Spectrum.life

• Individual wellbeing allowance via Juno

• Team breakfasts and lunches, snacks, drinks fridge, fun office @ Brain Embassy

• Huge opportunity for personal development and mastery as we grow together

• and more!

This role is London based (flexible hybrid, no fixed office days). Learn more about our ways of working here: https://hx.wiki/wow

Initial chat with our Talent team to kick things off - even if you are 1% curious, we are happy to give you a better taste of this role!

• Manager Interview

• Technical Skills Interview

• Values Interview

We offer!

Please note that background checks will be conducted as part of the hiring process to ensure compliance with our governance policies. We handle all background checks sensitively and in full compliance with relevant regulations. All applicant data will be processed in accordance with data protection regulations and our privacy policy.

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