Backend Engineer

• Design, build, deploy, and maintain services handling real financial transactions, owning reliability in production, not just at merge time
• Co-own service architecture, resilience, and scalability with respect to Domain-Driven Design principles
• Grow in technical leadership: lead design discussions, anticipate risks, and mentor less experienced engineers
• Drive continuous improvement, from fixing flaky CI to running post-mortems and propagating learnings across the team

Our primary languages are Go and Ruby. Our platform runs on a Kubernetes cluster hosted on AWS, with PostgreSQL as our database of choice. We’re also using Kafka for event-driven architecture and ELK for logging and auditing, among many other tools and services., * We value upfront technical design, team reviews, and smart slicing, quality drives the velocity our customers need

• Our org assigns one team lead per project across stacks, giving your team a clear mission and full autonomy on how it operates
• Our lean toolbox, Kaizen, PDCA, lets you monitor and drive continuous improvement collaboratively with your peers and manager
• Each engineer gets access to Cursor or Copilot, and we want people who use AI to raise the bar, not just to go faster

• Technical expertise: Strong backend engineering experience with exposure to large-scale web application architecture and real production constraints
• Stack fluency: You don’t need to know our exact stack, but you transfer fast and are comfortable with similar technologies
• Quality-driven: You write tests, set up monitoring, handle incidents methodically, and do root cause analysis
• Ownership mindset: You track impact after release, flag regressions, and improve what’s in your scope without being asked
• Team player: Comfortable working in squad teams with PMs, Designers, and other stacks; fluent in English

As a Backend Engineer, you will join one of Qonto’s squad teams, each organised around a clear project mission, with one team lead and full ownership of a product scope.

You’ll be part of a 190-strong backend engineering community within a 500- Product Engineering department, working in squad teams of 5 to 10 people alongside Product, Design, and peers from Frontend and Mobile.