Frontend Engineer

Location: Hybrid 2 days per week (no fixed days), based in Warsaw

About hyperexponential (hx)

At hyperexponential, we're building the AI-powered platform that enables the world's most critical decisions in a $7 trillion industry, which risks to take, and how to price them. These are the decisions that shape real-world outcomes: whether rockets successfully launch into space, autonomous vehicles make it to market, or communities recover after major storms.

Until now, insurance has been making billion-dollar decisions using outdated tools. We're changing that. Our platform brings together data, AI, and human expertise to give insurers the fastest path from submission to decision - helping them move faster, act smarter, and take on more risk with confidence.

Backed by a16z, Highland Europe, and Battery Ventures, we're scaling globally - already trusted by nearly 50 of the world's largest insurers, with zero churn and billions in premiums flowing through hx.

What began as a single product in one market has rapidly evolved into a multi-product, multi-territory platform powering every stage of pricing and underwriting. AI is at the core of what we do - from building the world's first domain-specific AI peer programmer for insurance (think GitHub Copilot with a PhD in actuarial science) to shaping agentic workflows that reinvent how this industry operates.

What makes hx different is the people who build it. Here, impact isn't tied to title or tenure; it's defined by the challenges you take on and the discipline you bring. Surrounded by peers who stretch you, you'll do the best, hardest work of your life in a company engineered to endure.

If that sounds like you, join us in building what comes next.

About the Engineering team

At hx, engineering is central to delivering on our mission of transforming the insurance industry with technology. Our engineers build hx Renew, a modern SaaS platform that allows insurers to model risk and price policies faster, smarter, and more flexibly. By focusing on usability, scalability, and resilience, we’re reshaping how insurers operate.

Our product teams are structured cross-functionally, bringing together frontend and backend engineers, designers, and product managers. This allows engineers to play a hands-on role in shaping features end-to-end, ensuring that technical and user considerations are built into every decision.

As a Senior Frontend Engineer, you will own the delivery of UI features across hx Renew’s workflow and admin management domains. You will serve as the team’s trusted expert on frontend matters, while also contributing to hx’s shared design system and component library. In addition to hands-on engineering, you will mentor peers, uphold high standards, and shape best practices across the wider frontend community.

What you’ll be doing

• Designing, building, and shipping workflow-related UI features in hx Renew, ensuring interfaces are reliable, accessible, and consistent with hx’s design system.

• Translating Figma designs into production-ready React components using shadcn and tailwindcss, resulting in high-quality and user-friendly interfaces.

• Collaborating with backend engineers and product managers to clarify requirements, shaping solutions that make complex workflows simpler for end users.

• Extending hx’s shared component library and design tokens to improve scalability and consistency across multiple product teams.

• Writing and maintaining unit and integration tests, improving frontend reliability and ensuring a robust CI/CD pipeline.

• Contributing to the wider frontend engineering community at hx by sharing knowledge, conducting reviews, and championing standards that raise code quality.

What you’ll need to have done

• Delivered complex multi-page React applications in production, demonstrating proficiency in building scalable SPAs with TypeScript and modern frontend tooling.

• Built and maintained reusable component libraries or design systems, ensuring adherence to accessibility standards and visual consistency.

• Implemented UI features with rich business logic and API integrations that improved usability and performance for end users.

• Improved system reliability by introducing or enhancing automated test suites (unit, component, and integration) and supporting CI/CD pipelines.

• Worked effectively in a cross-functional product team, collaborating with designers, backend engineers, and product managers to deliver impactful features.

• Demonstrated ownership and adaptability by driving improvements in frontend practices, whether through documentation, peer learning, or community engagement.

You’re unlikely to thrive here if

• You prefer focusing only on implementation without engaging in cross-functional problem-solving.

• You are uncomfortable mentoring or supporting the growth of peers and prefer to work independently.

• You avoid contributing to shared standards or are resistant to learning from a distributed engineering community.

If reading our Culture Document leaves you feeling neutral rather than energised, hx may not be the place where you'll do your best work. We're building something that asks for commitment and conviction, and we want you to feel excited by the opportunity to grow with us.

Benefits

Equity: We offer equity across all roles at hx, making it a significant component of total compensation.

Depending on how you choose to join hx (B2B or UoP), your benefits can look like:

B2B

• Share Options at a highly successful Series B company

• 25 days of non-working + 14 Polish bank holidays

• £5,000 budget for Learning & Development

• Mental Health Support and Therapy via Spectrum Life

• Optional for you: access to Healthcare package provided by Luxmed + Multisport (fully funded by yourself as B2B Contractor)

• Top-spec laptop (MacOS or Windows)

Contract of employment (UoP)

• Share Options at a highly successful Series B company

• £5,000 budget for learning & development

• 26 days of holiday + 14 Polish bank holidays

• Company pension

• 10 days company sick pay at 100% salary, thereafter in line with labour law

• Mental health support and therapy via Spectrum Life

• Monthly wellbeing allowance via Juno

• Healthcare package provided by Luxmed

• Multisport card at Classic level

• Top-spec work equipment (MacOS / Windows + additional monitors, mechanical keyboards etc)

Additional perks

• Top-spec equipment (laptop, screens, adjustable desks, etc.).

• Regular remote and in-person hackathons, lunch and learns, socials, and game nights.

• Team breakfasts and lunches, snacks, drinks fridge, and a fun office at The Brain Embassy

• Exceptional opportunities for personal development and growth as we build something remarkable together.

Interview Process

1. Initial call with our Talent team to kick things off (30 mins)

2. Manager Interview (60 mins)

3. Technical Interview - Code Review & Systems Design Whiteboard (120 mins)

4. Values Interview (60 mins)

Our commitment to Diversity

hxer's are at the centre of everything we build. We know that progress depends on diverse perspectives, and we are committed to creating an environment where everyone can thrive, grow, and make an impact. We recognise there is always more to do, and we take responsibility for shaping a workplace that is not only diverse but genuinely inclusive.

Diversity is not just the right thing to do, it is key to solving the complex challenges we choose to take on. By welcoming people from all backgrounds and experiences, we strengthen our ability to question assumptions, push boundaries, and design solutions that endure. If you're energised by complexity and motivated to grow, we encourage you to apply and join our global team.