Senior Product Engineer

Senior Product Engineer Location: London Working arrangement: On-site About the Company We are working with an early-stage, high-growth fintech building technology to transform how financial advice is delivered. The financial advice and wealth management industry is large and increasingly technology-driven, yet much of the infrastructure used by advisers remains fragmented, manual and highly dependent on legacy systems. The company is building a new generation of productivity, compliance and advice technology, combining modern product engineering with deep expertise in financial services and regulation. Your Role As a Senior Product Engineer, you will own significant customer-facing product areas across web and mobile, taking problems from initial ambiguity through to production. You will work closely with users, domain experts, designers and product leaders to understand the underlying problem, determine the right product approach and build the solution. You will not wait for every decision to be translated into a detailed specification. Instead, you will use customer evidence, product data and technical judgement to make trade-offs and move work forward. You will also contribute to frontend architecture and shared engineering foundations, helping ensure that client-facing products remain coherent and scalable as the company grows. You will: Own meaningful customer-facing workflows from initial scope through to productionTurn ambiguous customer problems into clear product and technical approachesBuild across frontend, backend and AI layers where requiredContribute to frontend architecture and reusable product foundationsMake evidence-led product trade-offs without waiting for complete specificationsMaintain a high bar for performance, accessibility and interaction qualityUphold and improve engineering standards across code, review, testing and releaseInvestigate production issues and feed findings back into product developmentLead technical decisions within your product areaContribute to broader engineering and product decisionsMentor engineers and strengthen product engineering practicesHelp assess and hire strong product-minded engineersTurn complex financial and regulatory workflows into simple, durable products What You'll Work On Your work will include: Customer-facing web and mobile productsEnd-to-end workflows involving meetings, data capture, research, suitability, reviews and complianceInterfaces for AI-assisted and agent-driven workflowsShared frontend architecture, component systems and product foundationsExperiences connecting structured customer data with documents, evidence and recommendationsReview, approval and escalation flows for regulated workProduct behaviour around incomplete data, uncertainty and long-running workflowsPerformance, accessibility and responsiveness across client-facing applicationsFrontend observability and production issue diagnosisExperimentation, analytics and evidence-led product iterationRelease quality and the engineering systems required for reliable deliveryProduct and technical direction within your area What We're Looking For 4+ years building and shipping customer-facing software in productionExperience owning a substantial product area from an ambiguous problem through to adoption and iterationStrong frontend engineering depth in TypeScript and modern web frameworksStrong full-stack capability, with the judgement to work across the wider system where neededExperience contributing to frontend architecture and shared engineering foundationsA track record of making product decisions without relying on complete specificationsStrong product judgement and the ability to explain technical and product trade-offs clearlyExperience working closely with design while maintaining technical ownershipEvidence of improving performance, accessibility and interaction quality in production productsExperience building reliable interfaces around complex data, workflows or permissionsExperience investigating production issues and translating findings into product improvementsA track record of scoping and delivering work over several months from a business or customer objectiveStrong written communication and the ability to document product and technical reasoningExperience improving standards across code review, testing, release and client-facing qualityComfort making decisions with incomplete information and real deadlinesExperience mentoring engineers and improving team qualityExperience working at startup pace without sacrificing judgement or engineering craft What Success Looks Like Success in this role means: Users can complete more of their day-to-day work within the platformComplex workflows become simpler without losing regulatory controlProduct decisions are grounded in evidence and clear reasoningClient-facing engineering moves quickly without accumulating avoidable inconsistencyWeb and mobile experiences feel coherent across productsPerformance, accessibility and interaction quality improve as the product scalesProduction issues are understood quickly and influence future product decisionsEngineers increasingly build on shared foundations rather than fragmented patternsCustomers trust the platform with increasingly important parts of their workThe product becomes deeply integrated into how customer organisations operateThe engineering organisation maintains a high bar for craft, ownership and judgement