Senior Platform Engineer

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.

About The Platform Team

Platform at hx builds the foundation that enables engineering teams to ship secure, scalable applications at velocity. We're evolving towards an AI-first platform where self-service infrastructure, intelligent automation, and reusable components compound developer productivity and operational excellence.

What You'll Be Doing

• Deliver self-service platform capabilities that drive measurable adoption across engineering teams, building reusable infrastructure components that reduce provisioning time and embed security and reliability by default.
• Embed AI into developer and operational workflows, implementing intelligent automation across CI/CD pipelines and operational tooling that demonstrably reduces manual effort and accelerates delivery cycles.
• Lay the foundation for agentic platform capabilities, prototyping and shipping initial features that enable more autonomous workflows with clear time savings and operational improvements teams use weekly.
• Strengthen security posture and operational standards through infrastructure design, ensuring new services adhere to platform-defined best practices with measurable reductions in misconfigurations and security exceptions.
• Treat the platform as a product, continuously improving developer experience through simplification, standardisation, and feedback loops, prioritising usability and value for internal customers.
• Partner across engineering, security, and product teams to understand requirements, influence technical decisions, and drive adoption of platform capabilities through clear communication and demonstrated value.

What You'll Need to Have Done

• Designed and built scalable, secure cloud infrastructure in production environments, demonstrating deep hands-on experience with Infrastructure as Code (Terraform, Pulumi, CloudFormation) and modern CI/CD practices.
• Shipped self-service infrastructure components that were actively adopted by engineering teams, with measurable improvements in deployment velocity, reliability, or developer experience.
• Leveraged AI and automation to solve real operational problems, whether through implementing AI-driven tooling, building intelligent workflows, or experimenting with emerging technologies.
• Taken end-to-end ownership of complex platform problems from discovery through delivery and adoption, focusing on measurable outcomes rather than outputs.
• Collaborated effectively with cross-functional stakeholders, translating technical concepts for non-technical audiences, gathering requirements, and influencing adoption of platform capabilities.
• Balanced long-term architectural vision with pragmatic delivery, iterating on solutions using data, feedback, and metrics to continuously improve performance, cost efficiency, and reliability at scale.

You're Unlikely to Thrive Here If

• You prefer executing predefined tasks over taking ownership of ambiguous problems that require exploration, experimentation, and iteration to solve.
• You view platform engineering as building infrastructure in isolation rather than treating it as a product with internal customers.
• You are uncomfortable with rapid change and continuous improvement, preferring stability and established patterns.

Compensation

At hx, we’re committed to salary transparency. You’ll always have clarity on pay early in the process. Our approach is to design compensation that’s competitive in the market, fair across teams, and aligned with the impact our people make.

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

• 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.

Interview Process

• Initial call with our Talent team (30 minutes).
• Manager Interview (60 minutes).
• Technical Assessment (system design whiteboard) (120 minutes).
• Values Interview with Tech Leadership (60 minutes).

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.