Senior Software Engineer (JVM/Kotlin)

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Until now, insurance has been making billion-dollar decisions using outdated tools.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

About the team

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.

Check out our Engineering Candidate Hub for a behind the scenes look at the team you would be joining!

What you'll be doing

• 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.

• 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.

• 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.

• 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.

• 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.

• 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.

What you'll need to have done

• 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.

• 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.

• 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.

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

• 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.

• 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're unlikely to thrive here if

• 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.

Because we're building at the intersection of technology/SaaS and insurance, our roles don't always map neatly onto traditional benchmarks. Our approach is to design compensation that's competitive in the market, fair across teams, and aligned with the impact our people make.

Equity: We offer equity across all roles at hx, making it a significant component of total compensation. Your talent partner will be able to share more details about this.

Benefits

Depending on how you choose to join hx (B2B or UoP), your benefits can look like:

B2B

• Share Options at a highly successful Series B company.

• 25 days of non-working + 14 Polish bank holidays.

• £5,000 budget for Learning & Development.

• Mental Health Support and Therapy via Spectrum Life.

• Optional for you: access to Healthcare package provided by Luxmed + Multisport (fully funded by yourself as B2B Contractor).

• Top-spec laptop (MacOS or Windows).

Contract of employment (UoP)

• Share Options at a highly successful Series B company.

• £5,000 budget for learning & development.

• 26 days of holiday + 14 Polish bank holidays.

• Company pension.

• 10 days company sick pay at 100% salary, thereafter in line with labour law.

• Mental health support and therapy via Spectrum Life.

• Monthly wellbeing allowance via Juno.

• Healthcare package provided by Luxmed.

• Multisport card at Classic level.

• Top-spec work equipment (MacOS / Windows + additional monitors, mechanical keyboards etc).

Additional perks

• 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 Brain Embassy.

• Exceptional opportunities for personal development and growth as we build something remarkable together.

Interview process

1. Talent Partner Screen

2. Hiring Manager Interview (60 minutes)

3. Technical Assessment - Code Review & Systems Design (120 minutes)

4. Values Interview with Tech Leadership (60 minutes).

5. We Offer!

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. We recognise there is always more to do, and we take responsibility for shaping a workplace that is not only diverse but genuinely inclusive.

Diversity is not just the right thing to do, it is key to solving the complex challenges we choose to take on. By welcoming people from all backgrounds and experiences, we strengthen our ability to question assumptions, push boundaries, and design solutions that endure.

If you're energised by complexity and motivated to grow, we encourage you to apply and join our global team.

Next steps

If this opportunity resonates with you, we encourage you to apply or share it with your connections! Our dedicated talent team reviews all applications, and we promise to provide feedback regardless of the outcome.

For more information about applying and to view other opportunities, you can visit our careers page.

Please note that background checks will be conducted as part of the hiring process to ensure compliance with our governance policies. We handle all background checks sensitively and in full compliance with relevant regulations. All applicant data will be processed in accordance with data protection regulations and our privacy policy.