Senior Data Software Engineer

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 500,000 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 doOwnership | Own your part, get things doneTeamwork | Make (team)work easyMastery | Continuously raise the barIntegrity | 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 50% international team members, 44% women, and 20% parents. Join us in building a workplace that celebrates diversity and individuality.
Discover the steps we took to create a discrimination-free hiring process.
At Qonto, we're reimagining financial management for SMEs and freelancers across Europe. As a Senior Data Software Engineer, you’ll shape the foundations that power our machine learning systems, helping us build smarter, faster, and more reliable financial tools.
👩‍💻🧑‍💻 As a Senior Data Software Engineer, you will:
• Build and maintain through real-time and batch, end-to-end data pipelines for ML model training and inference in a production and fast-paced environment.• Design and optimize data storage and access patterns for scale and performance• Deploy and manage model-serving systems for seamless production integration• Partner with ML Engineers to ensure data quality, scalability, and monitoring
🤔 What you can expect:
• You'll be joining a dynamic team of 1 Data Engineer and 5 ML Engineers where your work directly enables machine learning solutions that simplify accounting processes for SMEs and freelancers across Europe• At Qonto, we use lean methodology with a focus on continuous delivery, allowing rapid iteration and feedback on data infrastructure improvements• Work in pair with Machine Learning Engineer, and put into production models tailored to customer needs.
👨‍💻 What You’ll Work With:
• Python, software engineer, and system design principles to build clean, reliable, and scalable services and pipelines• SQL to store data, and query data efficiently• Stream Processing (Kafka, or similar) to process events in real-time.• Orchestration & Data tools (Airflow, DBT, Snowflake)• Collaborate across ML, backend, and product teams
🤝 About your future manager:
Marianne is deeply involved with the development team, providing swift problem-solving support and encouraging proactive discussions on technical decisions. With a focus on removing blockers and fostering innovation, she empowers team members to take ownership of their projects and grow professionally within the company.
🧠 About you
• Minimum 3 years of experience in data engineering, ideally applied to ML use cases• Strong Python and software engineering skills (microservices, CI/CD, testing)• Strong knowledge of batch and real-time pipeline design.• Proficiency in SQL and data modeling for performance• A team player who bridges technical and product discussions• [Bonus] Good understanding of ML workflows and data lifecycle
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;- Tailor-made remote work policy depending on the job you apply for and where you live;- Competitive salary package;- A meal voucher;- 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 exercise to demonstrate your skills and give you a taste of what working at Qonto could be like
Find more information about our interview process on our careers website.On average, our process lasts 20 working days and offers usually follow within 48 hours 🤞

To learn more about us:Qonto's Blog | Les Échos I L'Usine Digitale | Courrier Cadres

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