Senior Backend Engineer

Your role As a Senior Backend Engineer, you will own substantial backend systems and platform capabilities from design through to reliable production operation. You will work closely with product engineers, AI engineers, domain experts and engineering leadership to turn complex financial and regulatory problems into durable systems. You will not wait for every problem to arrive as a complete technical specification. You will be expected to understand the business objective, identify the important constraints and make sound engineering trade-offs. Your work will help determine whether Saturn becomes a collection of useful applications or a coherent platform capable of supporting increasingly important financial workflows. 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 system where neededExperience contributing to frontend architecture and shared engineering foundationsA record of making product decisions without relying on complete specificationsStrong product judgement and the ability to explain 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 record of scoping and delivering work measured in months from a business or customer objectiveStrong written communication, with the ability to document product and technical reasoningExperience improving standards across code review, testing, release and client-facing qualityComfort owning decisions with incomplete information and real deadlinesExperience mentoring engineers and improving the quality of a teamExperience working at startup pace without sacrificing judgement or craft Preferred Experience Building software for financial services, healthcare, legal or another regulated domainFinancial advice, wealth management or investment productsBuilding AI-native products or interfaces around probabilistic systemsDesigning human review, approval or exception-handling workflowsMobile product developmentComplex forms, document workflows or data-heavy applicationsDesign systems and frontend platform architectureBuilding enterprise products with sophisticated permissions and firm-specific configurationAccessibility standards and performance optimisationTaking a product from early adoption to broad production use What Success Looks Like Success in this role means: advisers can complete more of their working day inside Saturncomplex workflows become simpler without losing regulatory controlproduct decisions are grounded in evidence and clear reasoningclient-facing engineering moves quickly without accumulating avoidable inconsistencythe web and mobile experience feels coherent across productsperformance, accessibility and interaction quality improve as the product scalesproduction issues are understood quickly and influence what gets built nextengineers increasingly build on shared foundations rather than fragmented product patternsadvisers trust Saturn with increasingly important parts of their workthe product becomes harder to replace because it is deeply integrated into how firms operateSaturn develops a strong product engineering culture with a high bar for craft, ownership and judgement The team Our engineers care deeply about craft, speed and quality. They include early and founding team members from companies including Rippling, Postman, Gojek, CRED and Slice. You will work alongside product designers, backend engineers, AI engineers and domain experts with decades of experience in financial advice and compliance. We are building a small, high-calibre engineering organisation for people who want genuine ownership, difficult product problems and the opportunity to shape an important company while its foundations are still being formed. Our values We hire people who pursue greatness, care deeply about their work, seek truth over comfort, earn trust rather than assume it, and succeed or fail as one team. What We Offer a competitive salary with regular appraisalsa competitive equity package in an early-stage company with significant growth potentialour new five-floor office, The Dome, with an on-site gym and roof terracebest-in-class private medical and dental insurancea dedicated learning and professional development budgetaccess to a world-class gym and wellness centre two minutes from the officegenuinely difficult problems at the intersection of fintech, regulation and AIhigh ownership and autonomy while building the foundations of a company with a credible path to 50 times revenue growtha tight-knit, ambitious team that cares deeply about quality and one another