Backend API Engineer — Scalable, Secure

Veepee, a pioneer of online flash sales in France, is looking for a backend developer with strong experience in C# and .NET. This role involves developing new features, integrating platforms, and ensuring code quality in a dynamic and creative environment.The ideal candidate will have over 5 years of experience, excellent analytical skills, and a strong...

Qonto in Paris is hiring a Backend Engineer to build the financial infrastructure that powers 600,000+ European SMEs. You will design high-throughput APIs, ensure real-time processing, and own prod reliability within a Kubernetes-based platform on AWS using PostgreSQL, Kafka and ELK.Join a squad-driven culture that values upfront design, mentorship, and...

Mistral is seeking a Backend Engineer in Paris to build core systems powering our AI platform. You will focus on scalable backend features, APIs, authentication, billing, and developer tooling for millions of users and developers.Join a collaborative team dedicated to robust, high-performance systems, secure architectures, and end-to-end feature delivery....

About MistralMistral provides full-stack AI solutions: from frontier models to developer tools, applications, and compute. We partner with enterprises tackling the hardest problems—across high-stakes industries like finance, manufacturing, defense, healthcare, and the public sector—co-creating customized AI systems that they can run on their terms.We are...

As a Back End Developer at Earnix, you will be an integral part of our Engineering team, reporting to the Group Lead to Agentic AI. You will interact with AI Product Owners, Architects, and LLMOps to conceive technical solutions for our product, particularly by leveraging LLM capabilitiesWhat You'll DoDesign, develop, deliver, and document secure and...

A community management platform in Paris seeks a Senior Backend Engineer to design scalable services, lead architecture decomposition, and implement AI features. Key responsibilities include driving performance improvements and integrating third-party APIs. Ideal candidates will be proficient in Ruby, Python, or similar languages, with a strong background in...

As a Back End Developer at Earnix, you will be an integral part of our Engineering team, reporting to the Group Lead to Agentic AI. You will interact with AI Product Owners, Architects, and LLMOps to conceive technical solutions for our product, particularly by leveraging LLM capabilitiesWhat You'll DoDesign, develop, deliver, and document secure and...

Metreecs is seeking a Software Engineer Intern to own core services powering our forecasting platform. You will build and maintain high-performance APIs, model scalable database solutions, and collaborate with data science and frontend teams to deliver end-to-end features.Ideal candidates have Python backend experience with FastAPI, PostgreSQL, and Docker,...

About NablaWe are a team of entrepreneurs, clinicians and engineers committed to bringing back joy to the practice of medicine.Together with a community of clinician innovators, we’ve harnessed the best of machine learning science to develop Nabla: the leading AI assistant that’s restoring the human connection at the heart of healthcare. By streamlining...