[AI LAB] Backend Engineer - Python
Qonto
Software Engineering, Data Science
Paris, France
Posted on Dec 2, 2025
Our mission? Creating the freedom for SMEs to succeed in business and beyond, by delivering Europe’s leading finance workspace. We combine business-class tools (seamless invoicing, spend management, and pre-accounting) with unwaveringly attentive 24/7 support, designed to help businesses breeze through all things finance.
Our journey: Founded by Alexandre and Steve in July 2017, Qonto has rapidly gained trust, serving over 600,000 customers. Thanks to our wonderful team of 1,600+ Qontoers, we also made it to the LinkedIn Top Companies French ranking!
Our values:
Customer focus | Prioritize customers in everything you do
Ownership | Own your part, get things done
Teamwork | Make (team)work easy
Mastery | Continuously raise the bar
Integrity | Always do what’s right, and respect people
Our beliefs: At Qonto, we're committed to fostering a welcoming environment where everyone can thrive. We prioritize evaluating applicants based solely on skills and potential, ensuring diversity with 55% international team members, 44% women, and 20% parents. Join us in building a workplace that celebrates diversity and individuality.
⭐ Mission
Join our AI Lab as a Backend Engineer and ship user-facing AI agents that transform how 600,000+ businesses manage their finances. You'll work in small squads, each owning a specific AI agent. The overall team goal is an ambitious one: launch one AI agent every 6 weeks.
You'll help Qonto lead on AI in-product, working with Sophie and a fullstack team to build agents that directly impact our customers' daily operations.
👩💻🧑💻 As a Backend Engineer for Qonto's AI Lab, you will
• Ship an AI agent every 6 weeks, owning the full backend and AI logic from scoping to deployment ◦ Your squad will continuously develop and own a specific AI agent, managing its full backend and AI logic from scoping to deployment, within the team's ambitious 6-week release cadence.
• Build reliable AI systems with pragmatic guardrails that ensure agent behavior matches intent in a regulated banking environment
• Create maintainable, future-proof components that enable rapid iteration without constant rewrites
• Collaborate across the full stack, contributing to frontend (React/JS) through pair coding when needed
• Code hands-on 70% of your time in Python, with minimal meetings and maximum shipping velocity
🤔 What you can expect
• Startup mode within scale-up stability: The AI Lab is building its first agent now. Minimal process, quick dailies, weekly demos with leadership. Disagree and commit. Every hour counts.
• Cutting-edge AI stack: Daily work in Python, experimentation with PydanticAI, LangGraph, and LangChain. AI coding tools (Cursor, Claude Code) are baseline expectations.
• High autonomy, fast impact: Small squads (4-8 people) give you real ownership. See your work go live in weeks, not months.
• Team setup: 6 engineers (iOS, Android, Frontend, Backend, AI/ML) plus a designer across Grenoble, Rome, and Paris. Steve (CPO) attends Friday demos.
🤝 About your future manager
You’ll collaborate closely with Sophie, our accomplished product lead. With years of experience driving product strategy and delivery in both fast-growing startups and established tech companies, Sophie has a proven track record of turning vision into reality. She’s led cross-functional teams through the entire product lifecycle, from discovery to launch, always with a laser focus on solving real customer problems.
🏅 About You
• Python expertise (but agnostic approach): Strong production experience in Python, and continuous learning/improvement mindset. Bonus for Go knowledge to interact with Qonto's core services.
• Startup mindset: Fast learner, confident shipper who thrives under aggressive timelines. Scale-up or regulated industry experience (banking, fintech) is a plus.
• AI curiosity: You already use AI coding tools daily (Cursor, Claude Code, GitHub Copilot). Production AI experience not required.
• Pragmatic approach: Balance shipping fast with building reliable systems. Experimental mindset with AI guardrails.
• Strong communicator: You explain technical topics clearly to non-experts, diffuse knowledge across teams and align people to work successfully on their projects.
• Language: You are 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.
🎁 Perks
A tailor-made and dynamic career track. An inclusive work environment. And so much more to help you succeed.
- Offices in Paris, Berlin, Milan, Barcelona, and Belgrade;
- Competitive salary package;
- Meal vouchers;
- Public transportation reimbursement (part or global);
- A great health insurance (depending on the country);
- Employee well-being initiatives: access to Moka Care to take care of your mental health and great offers for sports and wellness activities;
- A progressive disability and parenthood policy (1 in 6 of Qonto employees is a parent!) and childcare benefits with selected partners;
- Monthly team events.
💬 Our hiring process:
- Interviews with your Talent Acquisition Manager and future managers
- A remote or live exercise to demonstrate your skills and give you a taste of what working at Qonto could be like
On average, our process lasts 20 working days and offers usually follow within 48 hours 🤞
To learn more about us:
To know how your personal data will be processed during your application process or to request its deletion, please click here.