Senior Software Engineer (JVM/Kotlin)

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Until now, insurance has been making billion-dollar decisions using outdated tools.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

Engineering at hx tackles complexity that matters. Submission Triage is one of our most strategically important product areas, transforming how the world's largest insurers handle inbound submissions. Where carriers once relied on slow, manual processes to sort through documents, emails, and attachments, we're building AI-powered workflows that convert chaos into clarity - enabling underwriters to focus on the risks that matter most.

The Triage team sits at the intersection of ambitious product vision and technical depth. You'll work alongside Product, AI specialists, and client-facing teams to architect systems that ingest unstructured data from multiple channels, apply intelligent triage logic, and deliver actionable insights at speed. This isn't incremental improvement - it's reimagining how submission intake works in a market where every hour counts.

As a Senior Engineer, you'll own meaningful architecture decisions, shape product direction through engineering judgement, and see your work deployed into production environments at global insurers within weeks. Success here is measured in faster quote turnarounds, reduced manual effort, and revenue growth for one of hx's highest-priority products.

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  Design and build scalable backend architecture for Triage that handles diverse submission formats (Excel, PDF, Word, images, email) and converts unstructured data into structured, actionable fields with measurable improvements in processing speed and accuracy.

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  Partner directly with Product and clients to translate underwriting workflows into technical requirements, turning ambiguous problems into concrete system designs that demonstrably reduce manual triage time.

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  Architect data pipelines that integrate AI-powered extraction with deterministic business logic, ensuring reliability and explainability while accelerating time-to-value for new client deployments.

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  Drive technical decisions around system modularity, API design, and multi-tenant configuration strategies that support diverse client needs without creating unmaintainable complexity or slowing iteration speed.

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  Collaborate with AI teams to identify where machine learning adds genuine value versus where traditional logic performs better, optimising for both accuracy and client trust in production environments.

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  Establish patterns and architectural standards for a strategically critical product area, raising engineering quality while maintaining the velocity needed to respond to market demands and competitive pressures.

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  Built and scaled production backend systems on the JVM (Java, Kotlin, or similar) that handled complex data processing or workflow orchestration, delivering measurable improvements in throughput, latency, or system reliability.

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  Designed architectures for systems that ingested unstructured or semi-structured inputs and transformed them into structured outputs, demonstrating strong judgement around data validation, error handling, and pipeline resilience.

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  Worked closely with product teams or clients to shape technical solutions based on real-world workflows, translating user needs into engineering decisions that balanced delivery speed with long-term maintainability.

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  Delivered features in ambiguous problem spaces where requirements evolved rapidly, showing ownership over outcomes rather than simply executing pre-defined tickets or specifications.

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  Made pragmatic trade-offs between technical excellence and time-to-market, shipping solutions that were good enough to validate hypotheses while maintaining the quality standards needed for production reliability.

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  Collaborated with cross-functional teams (product, design, AI, or customer success) to drive alignment around technical direction, demonstrating strong communication skills and an ability to influence without formal authority.

• You prefer environments with fully defined requirements and limited ambiguity, where product decisions are handed to engineering rather than shaped through collaboration with technical input.

• You prioritise personal technical perfection over pragmatic delivery, struggling to balance the tension between shipping quickly and building systems that last.

• You work best in isolation rather than through partnership, finding frequent cross-functional collaboration or client exposure draining rather than energising.

• If reading our Culture Document leaves you feeling neutral rather than energised, hx may not be the place where you'll do your best work. We're building something that asks for commitment and conviction, and we want you to feel excited by the opportunity to grow with us.