Full Stack Engineer, hyperexponential
Kotlin/React
£65-85k
+ Equity
2-3 days a week in office
AI-powered platform transforming risk and pricing decisions
Be an early applicant
AI-powered platform transforming risk and pricing decisions
201-500 employees
Be an early applicant
£65-85k
+ Equity
2-3 days a week in office
201-500 employees
Company mission
To build the decision infrastructure that helps the world take on more risk with confidence.
Role
Who you are
- Built and delivered backend or infrastructure services that enabled multiple teams to ship faster through reusable platform capabilities
- Designed and implemented APIs or platform services that achieved high reliability, scalability, and maintainability in production environments
- Delivered systems using Rust or Kotlin (or a JVM language) and demonstrated the ability to learn and apply new technologies when required such as Frontend exposure with React/TypseScript
- Implemented infrastructure using Terraform or other infrastructure-as-code tooling to support scalable cloud deployments
- Delivered systems on cloud platforms such as AWS, ensuring operational robustness, observability, and long-term maintainability
- Collaborated with cross-functional teams to design solutions, write clear documentation, and drive successful adoption of shared platform services
What the job involves
- Design and deliver a scalable authorisation service that enables granular permissions across the hx platform, supporting product teams building complex underwriting workflows
- Define and validate a granular permissions model in collaboration with product and engineering teams, ensuring it supports teams, roles, risk, privacy, and model access across the platform
- Build reusable platform services and SDKs that allow downstream teams to adopt core capabilities quickly, accelerating delivery across multiple product areas
- Develop infrastructure and APIs for platform capabilities such as authorisation, webhooks, notifications, and API proxy services, ensuring they are secure, resilient, and easy to integrate
- Partner closely with application teams to support adoption of the new permissions service, delivering an MVP that integrates with at least one production application
- Contribute to engineering culture through strong operational discipline, clear documentation, and collaboration that raises the standard of platform engineering at hx
Application process
- Initial call with Talent team (30 minutes)
- Manager Interview (60 minutes)
- Technical Assessment (e.g., code review, system design) (120 minutes)
- Values Interview with Tech Leadership (60 minutes)
- Offer
Salary benchmarks
Our take
hyperexponential was created to provide modelling software to help people and businesses build, deploy and manage analytical models that work with small, sparse and fragmented datasets. Its goal is to make teams more agile, collaborate more deeply, and work more productively.
hyperexponential's pricing and data-driven decision-making software is built for the speciality and commercial insurance markets. The product has broad applications, but the company's initial focus is on speciality insurance, a sector the founders know well, having worked there for more than a decade.
The company's making a name for itself too, working with some of Europe's biggest insurers to transform how pricing decisions are made. And its newest launch, hx AI, blends powerful AI with its core platform to help insurers build smarter models, faster. It's a strong signal that hyperexponential is not just growing, but ready to lead the way.
Freddie
Company Specialist at Welcome to the Jungle
Insights
Company
Funding (2 rounds)
Jan 2024
$73m
SERIES B
Jun 2021
$18m
SERIES A
Total funding: $91m
Company benefits
- £5,000 for individual and group training and conference budget
- 25 days holiday plus 8 bank holiday days (33 in total)
- Company pension scheme via Penfold
- Mental health and therapy provision via Spectrum.life
- Individual wellbeing allowance via Juno
- Private healthcare insurance through AXA
- Top-spec equipment (laptop, screens, adjustable desks, etc)
- Regular remote & in-person hackathons, lunch & learns, socials and games nights
- Team breakfasts and lunches, snacks, drinks fridge, fun office @ The Ministry
Company values
- We are owners - We help move hyperexponential forward without being told
- We push boundaries - We keep going for ourselves and our customers when most would stop
- We grow - We learn deeply, by making things. We improve through data and insights
- We go deeper - We apply a thoughtful and customer centric mindset to all we do
- We do the right thing - We are usually nice, never disrespectful, and always kind
Company HQ
London, UK
Articles
Leadership
Amrit Santhirasenan
(Co-Founder & CEO)CompSci at the University of York, qualified Actuary and previous Head of Pricing and Analytics of Tokio Marine Kiln, one of the largest managing agents at Lloyd’s.
People progressing
They joined hyperexponential in 2020 when the company still had a fairly small Engineering team. They were given the opportunity to step in as a Team Lead and ended up being one of the first Team Leaders within ProdEng.
Charlotte joined hx in 2022 and progressed from Project Manager to Delivery Lead, now driving strategic programmes and helping scale how we deliver cross-functional work.
Diversity, Equity & Inclusion at hyperexponential
Rotem Ben-David (Head of People Operations & Performance)
- We are committed to diversity and equal opportunity. We believe that the more inclusive we are, the better our work and culture is. We are not yet where we want to be in terms of balance, but it is our mission to build a team that represents a variety of backgrounds and perspectives and we are working hard towards that goal.
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