Kernel at hx builds the second iteration of our Model Runtime - the execution engine that powers customer pricing models across the platform. You're responsible for packaging and executing Models in multiple contexts, managing in-memory data stores, sandboxing customer code safely, and ensuring efficient resource handling for complex calculations at scale. You work closely with Models, DEX and Policies teams on cross-functional product initiatives that require new Model features.

Models at hx owns the integration of the Kernel into the server that provides interactive execution mode for customer Models. You build and improve the Model server's HTTP API, manage frontend interactions via websockets, handle session and client management, and constantly add new features to components that Model Developers use. You're shifting focus from the old runtime to improving observability, reliability and building features like Custom UI Components that give developers more flexibility.

DEX at hx owns batch rating and portfolio analytics end-to-end - from data pipelines and Lambda execution layers through to APIs and frontend experience. You give actuaries the tools to understand and rate their entire book of business at scale. The complexity comes from integrating legacy async task systems (designed 8 years ago for single policies) into modern serverless batch processing - all while managing Lambda timeouts, cost constraints, and making it feel instant for users rating thousands of policies at once.

Policies at hx builds the front door to the hx platform. You turn raw inbound submissions - emails, uploads, manual entries - into a clean, prioritised underwriting queue that flows straight into pricing. You use modern technologies including LLMs to automate intake and triage, reduce manual work, and connect submissions seamlessly with complex pricing. You work closely with Kernel/Models, MDT, the AI team and Product to shape a flagship product that sits at the centre of the underwriting journey.

Engineering Velocity at hx ensures teams can ship value to customers quickly, safely and regularly. You sit across large, strategic, cross-company initiatives and see them through to completion. No day looks the same - from identifying and resolving bottlenecks to incident resolution to building automations that improve day-to-day operations across the Technology function. You have a large surface area across Engineering, Product, Design, PMM, Support, MDT, Field Engineering and Senior Leadership.

Quality Engineering at hx ensures that when many independent teams bring changes together, the final product remains high quality and stable over time. You build and maintain shared testing tools - like end-to-end testing frameworks and performance testing solutions - that teams use at a product level. You define and run quality processes across the organisation, helping teams align on standards while building tools that are simple to pick up, flexible enough to cover many features, and reliable enough to use daily.

Platform at hx builds and evolves the self-service foundations that power one of the most technically ambitious product environments in fintech. You design, operate and continuously improve the infrastructure that enables teams to build, deploy and run services independently. You drive faster delivery, stronger reliability and disciplined cost efficiency at scale - making sure the platform grows with the product.

Security at hx is a proactive, embedded function that shapes how the organisation builds and scales technology. You translate industry best practices into practical guardrails, governance and automated controls - protecting the business while enabling secure, compliant innovation, including in rapidly evolving areas like AI. You're part of the conversation early, not brought in after decisions are made.

Delivery at hx is responsible for getting value into customers' hands in the quickest, safest and most regular way possible. You sit across large, strategic, cross-company initiatives and see them through to completion. No day looks the same - from identifying and resolving bottlenecks to incident resolution to building automations that improve the entire Technology function. You collaborate across Engineering, Product, Design, PMM, Support, MDT, Field Engineering and Senior Leadership.