Python Developer (AI&ML projects) (f/m/d)

About IDnow

IDnow is a leader in digital identity and fraud prevention in Europe with a mission to transform trust into the most powerful asset in the digital world, empowering enterprises with AI-driven, SaaS-based identity solutions that deliver scalable security, adaptive compliance, and real-time fraud prevention. Through its broad portfolio of digital identity and fraud prevention solutions, IDnow establishes, maintains and enriches trust throughout the customer journey, ensuring businesses can confidently and securely operate while leveraging digital identity to drive growth, security and scalability.

The company has offices in Germany, United Kingdom, Romania and France, and is backed by renowned institutional investors, including Corsair Capital and Seventure Partners. Its portfolio of international clients spans a wide range of end markets including financial services, telecommunications, travel & mobility, gaming, and other industries.

About the Role

As an experienced Python Developer, you will join our AI & ML team responsible for developing and integrating AI‑based fraud detection algorithms into our micro‑services infrastructure. Your objective will be to design such services and bring our algorithms from the prototyping stage to production for continuous improvement of our fraud detection and prevention capabilities. This position is based in Rennes, France.

Key Responsibilities

• Design, develop, and maintain Python micro‑services that form the foundation of our fraud detection platform.
• Design, integrate, and operate graph‑oriented databases for advanced relational analysis.
• Ensure code quality through thorough testing and participate in code reviews.
• Monitor micro‑service performance and provide timely improvements and bug fixes.
• Work closely with the product owner to understand customer needs and contribute to the product roadmap.
• Optimize algorithms and services to ensure high performance, scalability, and consistent reliability.

Preferred Experience

You are an expert in Python with strong skills in building complex services, ideally related to fraud detection. You master graph database architecture. You have basic knowledge of Machine Learning and Artificial Intelligence. Curious, rigorous, and impact‑oriented, you know how to transform raw, complex algorithms into reliable and operational services within a critical architecture.

• Bachelor's or master's degree in computer science, Software Engineering, or related field.
• Proven experience of at least 5 years as a Python Developer, with a strong focus on building scalable and high‑performance applications.
• Solid understanding of data structures, relational databases, graph‑oriented databases, algorithms, and object‑oriented design principles.
• Experience with containerization using Docker.
• Strong documentation skills.
• Strong knowledge of version control systems such as Git.
• Excellent problem‑solving abilities and critical‑thinking skills.
• Strong communication skills and a team‑player mindset.
• Good knowledge of the Agile/Scrum framework.
• Familiarity with micro‑services architecture.
• Fluent English and Professional French are both required.

Nice to have:

• Experience with fraud detection algorithms, machine learning, and artificial intelligence is a strong plus but not mandatory.
• Experience with C++ development is a strong plus but not mandatory.
• Experience as a technical lead or staff engineer is a strong plus but not required.

Perks & Benefits

• Health & Wellbeing: Use your full access to the mental health platform nilo, including 1on1 sessions.
• We value personal and professional development: make full use of Udemy, our training platform with 24/7 access and unlimited content/course consumption incl. certification.
• We make your remote work comfy: we provide support on equipment and offer flexible working hours.
• We value collaboration & love to come together: regular onsite gatherings, internal initiatives and summer parties to connect outside of work.
• May your family require your attention or other reasons apply: use the benefit of our paid special leave days.
• Enjoy the possibility to combine work with a longer stay at your holiday destination or extend a weekend with our Workcation possibilities.
• In addition to the perks & benefits above, we offer specific benefits that differ between our locations.