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Lead Software Engineer - AI Products

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hyperexponential

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Location:
United Kingdom , London

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

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Job Description:

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 Until now, insurance has been making billion-dollar decisions using outdated tools.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.

Job Responsibility:

  • Architect and build AI-driven products from scratch, tackling complex problems with no established playbook
  • Lead the design and implementation of novel features such as domain-specific coding copilots within hx’s proprietary development environment
  • Partner with cross-functional peers to shape architectural decisions, ensuring scalability, reliability, and long-term sustainability of our AI systems
  • Experiment, prototype, and ship rapidly, seeing innovations move quickly from idea to production in live customer environments
  • Contribute to the evolution of hx’s AI technical vision, embedding best practices and advancing engineering excellence across the team
  • Act as a multiplier: mentoring engineers, raising standards, and building a culture of curiosity, speed, and quality.

Requirements:

  • Built and shipped technically complex production systems in Python (ideally, but we are also open to Rust and Kotlin, with TypeScript as strong plus), including distributed services and cloud-based infrastructure
  • Solved messy, real-world engineering problems involving data, scale, performance, or reliability — not just greenfield CRUD apps
  • Taken end-to-end ownership of technical initiatives: identifying opportunities, designing solutions, and delivering impact
  • Communicated complex technical ideas clearly to a range of stakeholders, from engineers to product leaders
  • Influenced engineering direction and culture, scaling local wins into broader practices
  • Delivered AI or ML-powered products from prototype to scale, balancing experimentation with production rigour - nice to have.

Nice to have:

Delivered AI or ML-powered products from prototype to scale, balancing experimentation with production rigour

What we offer:
  • £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
  • 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

Additional Information:

Job Posted:
May 14, 2026

Employment Type:
Fulltime
Work Type:
On-site work
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