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 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 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 throughreal-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.