Senior/Staff Backend Engineer (London, Hybrid)

<h1><strong>About DualEntry</strong></h1><p style="min-height:1.5em">DualEntry is building the OS for finance.</p><p style="min-height:1.5em"></p><p style="min-height:1.5em">Every business needs a financial system of record, yet the world's largest fintech market ($220B+) still runs on software from the 1990s. DualEntry's AI-native ERP automates accounting from data entry to close, so finance teams move faster, spend less and incur less risk.</p><p style="min-height:1.5em"></p><p style="min-height:1.5em">In just 2 years we've raised $100M+ from Lightspeed, Khosla Ventures, Contrary and Google Ventures and earned the trust of customers from $5M ARR to publicly traded companies.</p><p style="min-height:1.5em"></p><p style="min-height:1.5em">We hire <em><strong>outliers</strong></em> - people who have achieved difficult things, in their careers or beyond. You'll find leaders, colleagues who've competed at the highest levels of sport, performed on Broadway, trained with UFC champions and founded the country’s largest Python community.</p><div style="min-height:1.2em;margin-top:0px;margin-bottom:0px"> </div><div><div style="left:0px;width:100%;height:0px;position:relative;padding-bottom:56.338%"><iframe src="https://embedded-media.ashbyhq.com/embed/90a003a5-39b1-4b2c-b1f7-cd8c1761ad1d/20c53adb-b0ed-4c0a-9ad5-0482edfea5a2" style="top:0px;left:0px;width:100%;height:100%;position:absolute;border:0px" allowfullscreen="true" scrolling="no" allow="encrypted-media *; picture-in-picture *;" sandbox="allow-scripts allow-same-origin allow-presentation"></iframe></div></div><div style="min-height:1.2em;margin-top:0px;margin-bottom:0px"> </div><h1><strong>Where You'll Create Impact</strong></h1><ul style="min-height:1.5em"><li><p style="min-height:1.5em">Build!</p></li><li><p style="min-height:1.5em">Design backend systems and APIs (Python preferred) that run real-time, business-critical accounting logic</p></li><li><p style="min-height:1.5em">Ship features end to end - architecture, CI/CD, testing, monitoring, and beyond</p></li><li><p style="min-height:1.5em">Integrate third-party tools and external systems, proactively managing edge cases and risk</p></li></ul><div style="min-height:1.2em;margin-top:0px;margin-bottom:0px"> </div><h1><strong>What Sets You Up for Success</strong></h1><ul style="min-height:1.5em"><li><p style="min-height:1.5em">Hardcore work ethic and high agency</p></li><li><p style="min-height:1.5em">5+ years in backend engineering (language agnostic)</p></li><li><p style="min-height:1.5em">Deep experience with complex business logic products</p></li><li><p style="min-height:1.5em">Strong database skills: PostgreSQL, SQL, ORMs, migrations, schema design</p></li><li><p style="min-height:1.5em">Experience deploying on AWS (or similar), with solid CI/CD and production-readiness fundamentals</p></li><li><p style="min-height:1.5em">Bonus: Python and a modern web framework (FastAPI, Flask, or Django)</p></li></ul><div style="min-height:1.2em;margin-top:0px;margin-bottom:0px"> </div><h1><strong>Why You’ll Thrive Here</strong></h1><ul style="min-height:1.5em"><li><p style=