hx Model Developer

The role

You will own end-to-end model delivery on hx Renew. This involves building and maintaining production-grade Python models and working with customer actuarial teams to solve complex modelling and coding problems.

What you will do

• Own end-to-end model delivery on hx Renew from scoping and build to testing, iteration, and customer delivery.
• Build and maintain production-grade Python models.
• Work directly with customer actuarial teams and internal stakeholders to solve complex, ambiguous modelling and coding problems.
• Raise quality across the team through code review, testing, and contributions to best-practice model development guidance.
• Support and mentor junior model developers through pairing, feedback, and day-to-day delivery support.
• Continuously look for ways to improve model development standards, tooling, and ways of working.

Required qualifications

• Shipped and maintained production-grade Python code in complex or data-heavy environments.
• Applied predictive modelling or advanced analytics in real-world settings.
• Taken ownership of ambiguous problems, creating structure and driving them through to high-quality outcomes.
• Worked directly with non-technical stakeholders or customers, translating requirements into robust technical solutions.
• Operated effectively in a high-trust, high-accountability environment.

Nice to have

• insurance or reinsurance exposure

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
• 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

Before you apply

• Background checks will be conducted as part of the hiring process.

About the company

hyperexponential (hx) is building an AI-powered platform for the insurance industry. The company is backed by a16z, Highland Europe, and Battery Ventures.