Senior Product Engineer in Vauxhall

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. 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.

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.

How we work: We're in the middle of a deliberate shift in how hx builds. Everyone in product development is a Builder, and the Product Engineer is the default unit of how we work. We organise around problems, not permanent teams. Small pods, usually of two to four Product Engineers, form around the highest-value problem, own it end-to-end from discovery through to running it in production, and re-form as priorities change.

Your growth sits elsewhere: a Career Mentor owns your development and progression, so you can move to where the most important problem is without your career following the org chart. We hire Product Engineers into hx, not into a fixed team, domain, or layer of the stack. You'll start in the stream where your strengths and our highest-value problems meet, and move as the problems move.

Product Engineers are T-shaped: deep expertise in software engineering, plus enough product and design judgement to make routine calls yourself. This is also a deliberately AI-native role, and one of the areas where we're moving fastest.

What you'll be doing:

• Taking a customer problem from discovery to production inside a pod, getting close to customers yourself, framing the problem, and shipping in small increments guided by real customer signal rather than internal opinion.
• Directing AI agents to draft implementation, tests, and migrations, then reviewing, integrating, and hardening that work.
• Designing and delivering robust production systems where correctness, performance, and resource efficiency matter, with the tests and observability that make complex behaviour safe to evolve.
• Working across the codebase wherever the problem leads, including areas your pod doesn't steward.
• Moving between pods, problems, and streams as priorities change, ramping fast on unfamiliar domains.
• Taking full accountability for outcomes rather than just your code changes.

What you'll need to have done:

• Built and shipped production systems end-to-end, from design through rollout, monitoring, and iteration.
• Designed testing and observability that made complex behaviour understandable, debuggable, and safe to evolve.
• Worked effectively in a polyglot environment, choosing the right tool for the problem.
• Strong systems experience, for example in Rust, C/C++, or Python.
• Used AI tools as a serious part of how you build.
• Carried product and design judgement into your engineering work.
• Owned outcomes beyond your immediate task.

You’re unlikely to thrive here if:

• You prefer following detailed instructions rather than experimenting.
• You are uncomfortable working directly with non-technical stakeholders.
• You avoid tackling ambiguous or open-ended problems.

Compensation: At hx, we’re committed to salary transparency. You’ll always have clarity on pay early in the process.

Benefits:

• £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.
• Individual wellbeing allowance via Juno.
• Private healthcare insurance through AXA.
• Income protection and Life Insurance.
• Cycle to Work Scheme.

Additional perks include top-spec equipment, regular remote and in-person hackathons, lunch and learns, socials, and exceptional opportunities for personal development and growth.

Interview process includes an initial chat with our Talent team, Lead Hirer Interview, Live AI Skills Assessment, Values Interview with the CTO, and Meet the CEO.

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.

Next steps: 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.

Location: London (hybrid)

Employment Type: Full time

Department: Technology Engineering Development