Backend/Fullstack Engineer - remote friendly

Engg; Paris; À distance; EUR 70 000 - 110 000; Plein temps

Résumé du poste

Qonto is seeking a Backend Engineer to build the financial infrastructure used by 600,000+ European SMEs, delivering highly scalable APIs and real-time banking services.

You will co-own service architecture, lead design discussions, mentor engineers, and drive improvements across CI/CD and production reliability in a Go/Ruby stack within Kubernetes on AWS.

Qualifications

• Proven backend engineer with experience building large-scale web apps and production systems.
• Strong command of at least one modern backend language and a track record delivering reliable services.
• Fluent in English and able to communicate across multidisciplinary teams.

Responsabilités

• Design, implement, deploy, and maintain high-scale backend services for real-time financial transactions.
• Co-own service architecture, reliability, and scalability with regard to domain-driven design.
• Grow technical leadership by guiding design discussions and mentoring peers.
• Drive CI/CD improvements and post-mortems to propagate learnings across the team.

Connaissances

Backend engineering

Go & Ruby

Distributed systems

English fluency

Outils

Kubernetes

AWS

PostgreSQL

Kafka

ELK

Description du poste

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, https://www.trustpilot.com/review/qonto.com based on 55,000+ reviews. Our culture https://qonto.com/en/careers/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 https://medium.com/qonto-way/the-qonto-way-our-culture-is-our-strategy-90defd4895f9). Our journey: Founded in 2017 by Alexandre https://www.linkedin.com/in/aprot/ and Steve https://www.linkedin.com/in/steveanavi/, 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 https://medium.com/qonto-way/a-recruiters-dilemma-confronting-bias-in-hiring-b78acce148eb because the best teams are built on merit. AI at Qonto: AI is deeply embedded in how we work (here https://medium.com/qonto-way/ai-at-qonto-vision-statement-725a7e2f659b) - 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.

Location

You can choose to work in Qonto as long as you're living in (or willing to relocate to) either Germany, France, Italy, Serbia, or Spain.

Mission

Join us as a Backend Engineer to build the financial infrastructure that 600,000+ 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.

Responsibilities

• 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.

What you can expect

OUR METHODOLOGY, THE QONTO WAY https://medium.com/qonto-way/tagged/the-qonto-way

• 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 https://medium.com/qonto-way/qonto-way-strong-engineering-culture-prt1-kaizen-spirit-7e6e0a17c07e, 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

Your future team

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.

About you

• 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

At Qonto, we understand that true diversity isn't just about ticking boxes on a hiring checklist. Apply regardless of the boxes you tick — who knows? You may have the missing piece of the puzzle we've been searching for all along.

Read our Privacy Notice https://qonto.com/en/legal-documents/privacy-notice for full details.

On average, our hiring process lasts 20 working days.