Jobs in London - Software Engineer • Central London

Company: Squirrel

Central London

Squirrel is partnering with a pioneering team building real-time AI coaching technology for sales teams. As a Founding Engineer, you will work directly with technical leadership to design, build, and deploy core features that deliver instant, contextual guidance during live sales calls. As an early team member, you will help shape both the product and engineering culture, making a tangible impact on the company’s trajectory and growth.Key ResponsibilitiesBuild and deploy core features end-to-end across our React + NestJS stackOwn the full product journey from ideation to productionMake foundational architectural decisions and leave a mark on the codebaseGather and act on weekly product feedback from real customersCollaborate closely with technical leadership to research, discuss, and execute solutionsDrive decisions that move the company closer to product-market fit and revenueHelp define and build engineering principles and team cultureShip fast and iterate based on evidence and feedbackTake ownership of problems and see them through to resolutionBe a sparring partner for leadership, bringing problems and solutions to the tableContribute to a feedback-rich, people-first environmentQualifications Required3+ years of engineering experienceStrong proficiency in React and full JS/TS stackBackend experience with REST APIs, NestJS or Express, and MongoDB (or similar)Evidence of building independently (side projects, open source, startups, etc.)Experience at a company with fewer than 50 peopleHigh agency and a bias for action, comfortable making decisions under uncertaintyPreferredPrevious founder experience or strong entrepreneurial driveAI-native developer workflow (e.g., Claude Code, Cursor, concurrent/cloud agents)Experience with AWS and CDKFamiliarity with CI/CD, TDD, and DevOpsUI/UX design skillsBenefitsCompetitive cash compensation (£75,000 to £95,000)1.5% equity (~£97,500, with significant upside potential)Fully comprehensive health insuranceOpportunity to own and shape core parts of the codebaseRare 0-to-1 experience in a fast-moving AI startupPotential to lead a team or grow into a senior leadership role within 18–24 monthsPaid take-home task as part of the interview processCompany CultureBias to action and rapid iterationFeedback-rich environment with regular retros and check-insPeople-first: kind, curious, and ambitious teamDeep ownership and end-to-end responsibilityOperate lean and adapt quickly to new evidenceValue experience in ambiguous, fast-changing environmentsLogistics5 days in the office (Central London)No remote or hybrid optionVisa sponsorship not specified (please clarify if needed)Interview ProcessStage 0: Talk to the team at SquirrelStage 1: Introductory conversation with technical leadership (30 mins, virtual)Stage 2: Technical and product deep-dive with leadership (45 mins, virtual)Stage 3: In-person final round, including a paid take-home task, system design session, and closing conversationAll company and personal names have been removed to ensure anonymity. For questions about the role, please use the application platform.