Emplois de senior python backend – Paris

Founded in 2020 and based in the heart of Paris, C12’s mission is to be at the center of one of the biggest technological breakthroughs of the century and change the course of history by building a universal quantum computer. At C12, we believe that achieving a true breakthrough in quantum computing requires rethinking the fundamentals. That’s why our...

C12 in Paris is hiring a Senior Software Engineer to shape the future of quantum measurement and to build the framework that runs experiments on quantum computers. You will drive backend development and bridge R&D with engineering teams. The role requires 5+ years building backend/data-intensive systems, strong Python, and experience with message brokers and...

Proton Technologies AG in Paris is seeking a Backend Engineer to join the Account Team, building Proton's most vital services for over 100 million users worldwide. You will craft scalable, secure backend systems, collaborate with product, design, APIs, and cross-functional squads, and turn complex technical challenges into robust, user-friendly features.The...

Join Cafeyn: Where Innovation Meets InspirationCafeyn is more than a platform— it is transforming the way people access and experience content. Since 2006, we’ve grown in a fast-evolving market, adapting to become a leading digital reading service with over 2 million users worldwide. Cafeyn gives readers unlimited, personalized access to thousands of...

Geser Best Paris recherche un Développeur Java Backend Senior pour renforcer les équipes techniques dans un environnement cloud et distribué. Le profil doit être orienté backend, capable de mener des développements Java modernes et de contribuer à des architectures robustes.Le candidat idéal justifie de 6 à 12 ans d'expérience, maîtrise Java et...

Présentation du poste : Au sein de l’équipe Data Analytics d'Artefact, vous rejoignez un pôle clé couvrant le dashboarding, l'analytics engineering, la mesure marketing et le low-code data science. Dans un environnement à forte croissance, vous intervenez auprès de grands comptes pour transformer leurs enjeux business grâce à une collecte, un...

Madbox is a fast-growing mobile gaming company with a very unique way of developing games. Everything has been made for teams to take as much ownership as possible, unleash their creativity, bring performance, and have as much fun as possible.In July 2022, we launched our Pocket Champs game worldwide which quickly became one of the top-grossing games in...

? Data Engineer Senior ? Big Data / Lakehouse / AWS Niveau : Senior Expérience : 8 ans minimum en Data Engineering Démarrage souhaité : ASAP Durée : 12 mois, renouvelable Rythme : 5 jours/semaine Télétravail : 3 jours/semaine ? Contexte de la mission : Dans le cadre du renforcement de son pôle Data Services, notre client recherche un Data Engineer...

# Senior Software Developer (M/F)Contract: Full-time (permanent)Location: ParisTeam: HybridCompensation: €65,000 – €85,000 gross per yearApply to this roleContact## About the roleYou're joining Gopaxo's platform team to design, evolve and harden the backend that orchestrates our calls to train operators, bus operators, carpooling platforms and...

About Nabla We are a team of entrepreneurs, clinicians and engineers committed to bringing back joy to the practice of medicine. About Nabla We 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...

Description Du Poste leboncoin, 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...

PETROFF AVOCATS is seeking a Senior Software Engineer to join our engineering team and work on a large-scale production application. The role focuses on building and improving a Laravel backend and a Next.js frontend, with PostgreSQL and ongoing MongoDB migration, plus Dockerized infrastructure, CI/CD, and cloud deployment.You’ll collaborate with the...

Build and maintain batch and streaming data pipelines.Move production data into archival/data lake storage safely and observably.Improve quality, reliability, and observability of derived datasets.Design validations for freshness, completeness, schema correctness, and data quality.Build reusable datasets that reduce one-off data extraction and aggregation...

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...

The Role We’re building the next generation of real-time conversational AI systems. Our agents operate under real production traffic, where latency, scalability, reliability, and engineering quality are critical. We’re looking for a Senior AI Software Engineer to design and build the production systems that allow these agents to respond intelligently and...

Sweep is looking for a Senior Fullstack Engineer (freelance)to work on our Sustainability Data Intelligence Platform. Climate change is the defining issue of our time. Sweep builds a sustainability data intelligence platform used by major enterprises to track greenhouse gas emissions, meet regulatory requirements, and drive real decarbonization. We're a B...

Description Payplug est la solution de paiement française pensée pour les commerçants, e-commerçants de toutes tailles et fintechs. Avec notre plateforme technologique de pointe, nos outils dédiés à la conversion et notre maîtrise unique de la chaîne de paiement, nous vous invitons à viser le meilleur, et plus encore. Payplug, c’est une équipe...

# Senior Data Scientist - AI Product* Paris* CDI* Date de début : 01 juin 2026* Postuler## À propos** Contexte : l'IA au cœur d'une ambition mondialee structurante pour devenir leader mondial du CSKM**Mayday est une plateforme de **Knowledge Empowerment boostée par l’IA**, conçue pour aider les entreprises à structurer, activer et faire vivre leur...

About us💙 Implicity is a digital MedTech, that brings outstanding innovations to cardiologists, thanks to Big Data and Artificial Intelligence.Thanks to our leading cardiac remote monitoring platform, it's way easier to manage data and predict patient issues, so that cardiologists can bring the best care at the best time.To put it simply, when you join...

Localista is seeking a Senior Fullstack Developer to join our team for an exciting web application project built with Remix, React, and TypeScript. You will design and implement features with an emphasis on performance, scalability, and a clean user experience.You will collaborate with product and backend teams to design database schemas, integrate with...