Senior Fullstack Engineer
The Opportunity
Traditional insurance reacts to accidents after they happen. This fast-growing scale-up is changing the narrative by using real-time, data-driven insights to prevent them entirely. Nearing one billion connected, insured miles and backed by over £50M in funding, they are building the definitive insurance platform for the next generation of global delivery, logistics, and ride-hailing networks
.To fuel this next phase of hyper-growth, the business is expanding its core platform capabilities. This role sits within a highly strategic team tasked with engineering the systems that bring entirely new fleets, brokers, and industry sectors onto the platform
.As a Senior Fullstack Engineer, you will step into an end-to-end ownership role. You will design, deploy, and measure the impact of features that directly unlock new commercial opportunities, balancing complex backend architecture with intuitive user experiences
.
What You’ll Be Doi
ngYou will dive deep into a sophisticated, highly asynchronous technical ecosystem where you will lead features from initial ideation through to production. Your daily focus will balance writing clean, performant domain logic with establishing the frontend tools that make complex configurations seamless for the wider busines
- s.Drive architectural consistency across a TypeScript monorepo using CQRS and Hexagonal architectur
- e.Design commands, events, and projections to keep distributed microservices communicating asynchronousl
- y.Partner with product and underwriting teams to transform complex rating logic into clean interface
- s.Extend an internal React-based application that safely configures product behavior and onboards new sector
- s.Build and scale resilient, cloud-native services utilizing a modern AWS serverless stac
- k.Champion technical excellence across the team, focusing on system observability, idempotency, and graceful recover
y.
What They’re Looking
ForThe team values practical, collaborative engineers who care deeply about system design, code quality, and the commercial impact of their work. They look for professionals who enjoy solving intricate domain modelling challenges and thrive in a culture of continuous technical improveme
nt.Essent
- ialStrong hands-on engineering capability with a track record of navigating large TypeScript monorep
- os.Production experience designing and operating distributed, event-driven backend architectures on A
- WS.Deep understanding of asynchronous patterns, eventual consistency, retries, and idempoten
- cy.Strong architectural foundation with exposure to CQRS, event sourcing, or Clean/Hexagonal Architectu
- re.Practical, hands-on experience building web applications with a modern frontend framework, ideally Rea
ct.
Nice to
- HaveExperience building internal toolings or dashboard interfaces on top of highly complex domain mod
- els.Background modelling intricate business domains where configuration layers and rules evolve frequen
- tly.Familiarity with CI/CD workflows, automated testing pipelines, and modern observability tools like Data
- Dog.Prior technical exposure to fintech, insurtech, or other highly regulated, transactional environme
nts.
Why
Join?This is an opportunity to join a mission-driven scale-up where engineering excellence directly unlocks company growth and your technical decisions have immediate visibility. You will work within a collaborative environment that prioritizes technical autonomy, psychological safety, and meaningful career develop
- ment.Own the systems driving the commercial expansion of a platform transforming global road sa
- fety.Access dedicated continuous learning support, including an annual personal budget, funded qualifications, and paid learning
- days.Comprehensive private medical insurance covering dental, optical, and mental health sup
- port.Flexible salary sacrifice options covering workplace nursery, gym memberships, technology purchases, and electric vehi
- cles.Modern, flexible workplace culture with enhanced parental leave policies and a central London office
hub.
Key Skills
Ranked by relevance
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- Posted
- Jun 14, 2026
- Type
- Full-time
- Level
- Mid-Senior
- Location
- City Of London
- Company
- numi
Industries
Categories
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