hyperexponential - Senior Product Engineer
Requirements
• Strong professional experience building and running backend systems in Kotlin, Java, or another JVM language. • Judgement in architecture and system design: a feel for what to build now, what to defer, and what will hurt in two years. • Evidence of shipping software that solved a real customer or business problem, ideally something you owned end to end. • A self-starting approach. You find the highest-value problem rather than waiting for a ticket. • Clear communication. You can hold the same conversation with an underwriter, an executive, and an engineer, and adjust for each. • Genuine appetite for problems with no known answer, and comfort working without a precedent to copy. • Confident, responsible use of AI coding tools, with a critical eye on their output. • Receptiveness to feedback. We give it directly and often, and we expect you to give it back. • Experience in insurance, underwriting, or another complex regulated domain. We will teach you the domain. We cannot teach curiosity about it. • Experience across both backend and frontend. • Experience building workflow, decision-support, or agent-assisted products. • Experience working directly with enterprise clients. • YOU’RE UNLIKELY TO THRIVE HERE IF • You prefer following detailed instructions rather than experimenting and finding your own approach. • You are uncomfortable working directly with non-technical stakeholders to understand their challenges. • You avoid tackling ambiguous or open-ended problems where the solution isn’t obvious.
Responsibilities
• Design, build, and operate backend services in Kotlin or Java, and own them in production. • Turn ambiguous underwriting problems into simple, reliable software. Much of the work is deciding what to build, not just building it. • Shape architectural decisions: APIs, domain models, persistence, reliability, observability, and how the platform evolves without collapsing under its own weight. • Build real depth in the underwriting domain, to the point where you can challenge a requirement rather than only implement it. • Design and build agent-assisted workflows, and make judgement calls about where an agent should act, where it should advise, and where a human must stay in control. • Use AI coding tools, including Claude, as a core part of how you work. You delegate substantial work to them and you remain accountable for the quality, security, and correctness of everything you ship. • Work across boundaries with frontend engineers, product partners, and client-facing teams, and step outside your specialism when the problem demands it. • Give and take direct feedback, and raise the engineering bar around you.
Benefits
• At hx, we’re committed to salary transparency. You’ll always have clarity on pay early in the process - our Talent Partner will share details with you during initial conversations - and we’re working towards publishing salary information for all roles globally. • Because we’re building at the intersection of technology/SaaS and insurance, our roles don’t always map neatly onto traditional benchmarks. Our approach is to design compensation that’s competitive in the market, fair across teams, and aligned with the impact our people make. • Equity: We offer equity across all roles at hx, making it a significant component of total compensation. Your talent partner will be able to share more details about this. • £5,000 training and conference budget for individual and group development. • 25 days of holiday plus 8 bank holidays (33 days total). • Company pension scheme via Penfold. • Mental health support and therapy via Spectrum.life http://Spectrum.life. • Individual wellbeing allowance via Juno. • Private healthcare insurance through AXA. • Income protection and Life Insurance. • Cycle to Work Scheme. • 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 Ministry. • Exceptional opportunities for personal development and growth as we build something remarkable together. • OUR COMMITMENT TO DIVERSITY • hxers 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. • If this opportunity resonates with you, we encourage you to apply or share it with your connections! Our dedicated talent team reviews all applications, and we promise to provide feedback regardless of the outcome. • For more information about applying and to view other opportunities, you can visit our careers page. • 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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