Emplois de senior python backend – Paris

You build the systems that actually make AI work in enterprise environments, not demos, not prototypes that stall after a pilot, but production agentic architectures running inside real client organizations. The difference between an AI Engineer and what we are looking for is straightforward: you have shipped a multi-agent system in production, you have...

Hi, we're Back Market. We're here to help make tech reliable, affordable, and better than new . We're a global marketplace for refurbished devices, helping lower our collective environmental impact by providing trustworthy, affordable tech with 92% less carbon emissions than new. Yep, you read that right. Turns out refurbished tech is way better for the...

Kleep is seeking an engineer to design, automate and operate our AWS infrastructure, working directly with the CTO to scale a fast, secure platform for fashion e-commerce. The stack includes TypeScript, React on the frontend and Node.js/Python on the backend, hosted on AWS.You will own the full lifecycle of the platform, contribute to CI/CD pipelines,...

[CDI] Backend Developer (Elixir) - Minimum 2 years of experience in CDI - Culture/Art - Startup - Fully remote or 4-day workweek for senior candidatesIf you're looking for a challenge and want to join a growing startup in the Culture / Events / Sports sector as a Backend Developer (Elixir), here are the main details, and I’d be happy to discuss more...

Description de l'entrepriseAre you ready to develop the future of retail?  VusionGroup est une entreprise de retail tech en forte croissance. Implanté dans 19 pays sur 3 continents, nous sommes leader mondial des solutions de digitalisation du commerce physique.Nous inventons des technologies qui créent un impact positif sur la société en permettant...

C12 Quantum Electronics in Paris is seeking a Senior Software Engineer to shape the future of quantum measurement. You will build and maintain the software framework that enables experiments on quantum computers, collaborating with R&D and hardware teams.The role emphasizes scalable backend systems, Python, and data-driven workflows, with opportunities to...

Senior Full-Stack Software Engineer Joining the Booking & Aggregators team, you will play a crucial role in shaping the success of our engineering department by providing a complete and customizable solution for managing bookings. Key Responsibilities Lead the design of microservices and event‑driven architectures for high‑volume data and balance...

Join Proton and build a better internet where privacy is the default At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to...

Senior Java Fullstack Developer ? Dutch? Localisation : Aalst, Belgique ? Secteur : Public Sector ? Type de mission : Freelance / Sous-traitance ? TJM : Ouvert selon profil ?? Langue : Néerlandais obligatoire ? Date limite de soumission : 14/08/2026 à 11h00 Contexte de la missionDans le cadre de la poursuite du projet VMJV (Validation Environmental Annual...

After a successful transformation phase, we're entering a key new stage in 2026: acceleration. Today, we’re a solid, profitable, and growing European scale-up, proudly ranked in the French Tech 120, with a clear ambition: to become the go-to reference for local customer experience for multi-location businesses. Our mission is simple: help businesses better...

Taux journalier (TJM): 520 CONTEXTE La Direction Technique d'un grand groupe audiovisuel public mène des projets transverses en étroite collaboration avec les autres directions, notamment la direction Data. La Direction Data a été créée avec la volonté de faire de la Data un levier de croissance des offres numériques. La Direction Data a 3 grandes...

****Join Proton and build a better internet where privacy is the default**** Proton was founded in 2014 by scientists from CERN on a simple truth: ****privacy is a fundamental human right**** . Since then, we’ve built the world’s largest encrypted email service (Proton Mail) and expanded into Proton VPN, Proton Drive, Proton Pass, and Proton...

About The Role As part of the Bureau of Technology, you will design, build, and scale AI-driven solutions to improve our marketplace. You will join the Pricing & Quality team—a mix of data scientists and backend engineers—focused on curating offers that give customers the best value for money. Your focus will be to implement models and algorithms that...

We are seeking a seasoned, digital mindset development engineer to join our team of developers, with demonstrated experience on state of the art tools and techniques on the DevSecOps trends. We need a Full-Stack Developer able to work on Python Backend development ecosystem. The work perimeter will vary between architecture solutions development...

Descriptionleboncoin, est le 1er site généraliste de vente entre particuliers en France, leader sur les marchés de l’immobilier et l’automobile, acteur clé sur les biens de consommation de seconde main et sur l’emploi. Chaque mois leboncoin est plébiscité par 30 millions de Français qui apprécient la richesse de son offre et la facilité des...

Objectif de la mission:Recherche d'un Architecte Data Sénior (Freelance) pour le développement de la Data Platform et l'accompagnement des équipes Data.Missions principales:Définition et évolution de l'architecture DataAmélioration de la Developer Experience (IaC, CI/CD, Terraform…)Pilotage FinOps (suivi budget, monitoring, optimisation)Ville...

Join the fintech revolution with Mambu, the leading SaaS cloud banking platform. We're on a mission to make banking better for a billion people. We're engineering the future of financial services with AI at its core. At Mambu, AI isn't a feature — it's how we're rebuilding banking from the ground up. If you're ready to apply cutting-edge technology to...

Department: Marketing Effectiveness - Europe Location: France Description This role sits at the heart of Ebiquity's Analytics practice in France, working directly with leading advertisers to maximise the returns on their marketing and promotional investment. As a Senior Consultant, you will take ownership of the end-to-end development and delivery of...

Milestone Advisory est un cabinet de conseil spécialiste de la transformation réglementaire et métiers du secteur financier qui réunit un collectif de talents experts et passionnés.Fondé en 2023, Milestone Advisory est en plein essor. L’équipe est composée d’un collectif d’experts où l’Audace, la Confiance et l’Excellence sont les piliers...

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 a...