Our mission and customers: We are creating the freedom for SMEs to succeed by delivering Europe’s leading finance workspace with banking at its core, augmented by financial tools. We are proud to be rated 4.8 on Trustpilot , based on 55,000+ reviews. Our culture puts customer satisfaction at the core of what we do, as proven by our Net Promoter Score of 75 (more about our culture here ). Our journey: Founded in 2017 by Alexandre and Steve , Qonto has grown to 1,600+ Qontoers serving over 600,000+ customers across 8 European countries. We have been profitable since 2023, and we are just getting started. Our beliefs: We hire for skills and potential. With 80+ nationalities, 45% women, of which 56% of women in our leadership team, diversity isn’t a program; It’s who we are. We’ve built a discrimination-free hiring process because the best teams are built on merit. AI at Qonto: AI is deeply embedded in how we work ( here ) - Every Qontoer gets unlimited access to the best AI tools. We want people who experiment without waiting for permission, push AI beyond the obvious, know when to trust it,

and when to question it. Join us as Principal Backend Engineer in the Foundations domain and help scale the critical systems that power Qonto’s 600,000+ customers — before they become bottlenecks. You’ll drive company-wide backend initiatives spanning transactions, search, monetization, permissions, and integrations. ➡️ What you’ll do
- Anticipate and solve scale challenges before they hit: You’ll map technical risks across Foundations’ core systems — ~600k daily transactions approaching 1B total, search indexing, billing — and drive the architectural work that keeps Qonto’s growth ahead of its infrastructure.
- Lead broad, high-stakes technical initiatives: You’ll own end-to-end programs spanning multiple teams, touching Legal, Risk, Compliance, and leadership, with real business consequences.
- Shape the platform’s future: You’ll identify where Foundations needs to invest next —

Principal Backend Engineer

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