FULL TIMEPosted: 2 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. OUR JOURNEY] Founded in 2016 and launched in 2017 byAlexandre and Steve, Qonto has grown to 1,700 Qontoers serving over 750,000 customers across 8 European countries. 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 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 Senior Backend Engineer to build the financial infrastructure that 750,000+ European SMEs depend on every day, from highly scalable APIs to robust banking services that handle real money, in real time, with zero room for mistakes.

Por favor, verifique que tiene el nivel de experiencia y las cualificaciones adecuadas leyendo la descripción completa de esta posibilidad a continuación.

You will join one of our mission-based teams of 5 to 10 engineers, led by a dedicated Engineering Manager. You will work alongside backend, web, iOS, and Android engineers, as well as Product Managers and Designers, in either a Product team (building features used directly by customers) or a Platform team (developing the scalable foundations that help Product teams move faster). Your team owns a clear mission end-to-end, following our "you build it, you own it" approach, and you will stay connected to the wider Backend community through our Backend Guild.

What you'll do
Design, build, deploy, and maintain services handling real financial transactions, owning reliability in production, not just at merge timeCo-own service architecture,



resilience, and scalability with respect to Domain-Driven Design principlesGrow in technical leadership: lead design discussions, anticipate risks, and mentor less experienced engineersDrive continuous improvement, from fixing flaky CI to running post-mortems and propagating learnings across the teamContribute to discovery, make technical decisions, monitor production performance, and steadily raise quality standards What we're looking forTechnical expertise: Strong backend engineering experience with exposure to large-scale web application architecture and real production constraintsStack fluency: You write tests, set up monitoring, handle incidents methodically, and do root cause analysisOwnership mindset: You are comfortable working in squad teams with PMs, Designers, and other stacks, and you are fluent in English What we can offer youOur methodology, the Qonto Way: We value upfront technical design, team reviews, and smart slicing.

Quality drives the velocity our customers needAutonomy: Our org assigns one team lead per project across stacks, giving your team a clear mission and full autonomy on how it operatesContinuous improvement: Go and Ruby are our primary languages. Our platform runs on a Kubernetes cluster hosted on AWS, with PostgreSQL as our database of choice.

We also use Kafka for event-driven architecture and ELK for logging and auditing, among many other tools and services[DIVERSITY]At Qonto, we understand that true diversity isn't just about ticking boxes on a hiring checklist. More information on our candidate journey here[DATA RETENTION]By applying, you agree that Qonto processes your personal data to assess your application. xghoner Your data is kept for up to 2 years in our candidate pool.

📌 Senior Staff Backend Engineer (Barcelona)
🏢 Qonto
📍 Barcelona