backend engineer

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Services Center Mid/Senior .NET Software Developer based in France.You will work on backend systems that ensure reliable data exchange across complex workflows, including service connectors, data transformation pipelines, and...

About the Role You’ll join the Performance team the engineers who own advertiser outcomes at Vibe. Bidding, pacing, and the prediction stack that drives both. You’ll report to Clément Schiano, Engineering Manager for Performance. This role exists because our roadmap is clear and the bottleneck is execution. We have a knowledge concentration problem too:...

Une start-up spécialisée en IA à Marseille recherche un Expert Python (H/F) pour développer et maintenir des API performantes en Python avec FastAPI. Vous travaillerez avec MongoDB, Redis, et des équipes frontend et DevOps. La mission inclut l'intégration d'API externes et la gestion de tâches asynchrones. Un salaire compétitif entre 45 000 € et 60...

Datadog is shaping the leading observability and security platform for engineers, handling trillions of data points daily with always-on alerts, metrics, logs, traces, and security insights at scale.We operate as a hybrid workplace to support work-life harmony and collaboration. The role involves solving scaling bottlenecks, deploying features to production...

Diabolocom is seeking a Senior Backend Software Engineer to join its Core Squad in Paris. You will design, build, and optimize back-end services for data gathering, processing, and delivery, shaping core product architecture for a cloud-based, scalable platform.You will work with Kotlin (preferred) or Java, PostgreSQL, and distributed systems, collaborating...

Runware is seeking a Senior Software Engineer to build and evolve the systems and APIs powering the Web App and DevEx. You will collaborate with backend, frontend, Product and Design teams to create reliable developer-facing APIs and functionality that simplify AI infrastructure.You will take ownership of backend work from requirements to delivery,...

Warren Walter recherche un Développeur Backend Java Senior pour contribuer à la modernisation et à la stabilisation des outils de qualité des données produit dans un contexte international.Vous concevrez et développerez des services backend Java 21, Spring Boot et Quarkus, mettrez en œuvre des API REST et des architectures événementielles, et...

Dashlane is seeking a Backend Software Engineer with a strong security background to join the Paris-based product development team. You will design, build, and operate backend services powering security-sensitive features for B2B and B2C users.The role focuses on improving user protection, identity controls, and risk reduction, collaborating with product,...

Hucency, a French company specializing in human-centered cybersecurity, is seeking a Senior Go Developer to join the Roubaix development team and help maintain the password manager while adding new features.You will work in a dynamic, fast-growing environment with a team of over 50, reporting to the Technical Director. The role offers a long-term commitment...

Diabolocom UK Ltd is seeking a Senior Backend Software Engineer in Paris to join their Core Squad. The role involves designing and optimizing back-end services using Kotlin and PostgreSQL, ensuring high-quality practices and collaborating with product teams. Candidates should have over 7 years in software development and strong leadership potential. The...

Datadog is seeking a strong technical leader to join the Private Action Runner team and help shape the core execution layer behind action-taking and remediation across customer infrastructure. The role is hands-on, with leadership exposure as the team grows to an Engineering Manager 1 position.You will mentor a team of engineers, contribute to architecture...

France Travail recherche un développeur capable de concevoir une application web dans le cadre d’un contrat à durée indéterminée. Poste en travail en journée avec 35 heures par semaine et salaire brut annuel entre 60 000 et 80 000 Euros; un ordinateur portable est fourni et un plan d’actionnariat salarié est proposé.Une expérience de 10 ans est...

Vizzia is hiring a backend engineer to own large parts of the edge and cloud backends for video surveillance products. You will work on camera communication, edge storage, and cloud APIs, with a focus on reliability, audit trails and data integrity in a regulated public sector context.You will operate across edge to cloud pipelines, use TypeScript/Node, and...

A leading AI media platform for sports in Paris is seeking a Senior Backend Engineer to develop backend services powering video processing and media automation. You will design APIs, optimize database schemas, and collaborate across product teams. Ideal candidates have over 5 years of backend experience and proficiency in Go. Join a fast-growing, diverse...

Swan is seeking a Confirmed Software Engineer to join its large tech team for a multi-month project in a fast-growing payments environment. You will own one or more backend initiatives and work on solving complex problems within a reactive architecture.You will collaborate with the product team to design the bank-by-API, improve performance under increasing...

Upsun, a cloud application platform, is looking for a Software Engineer to own and build the billing backend. You will work on invoices, taxes, usage reporting, and integrations that connect to external billing systems, impacting tens of millions in revenue.You’ll collaborate with Finance, Product, and Support across Europe, North America, and India, write...

United States Digital Space LLC is hiring for a backend-focused role within its Platform team. You will design, implement, and maintain robust APIs and backend services spanning payments, analytics, subscriptions, text-to-speech, and external integrations.Work in a 100% distributed setup with a focus on scalable architecture, performance, and strong user...

Jobtailor in Paris, France is seeking a backend engineer to design and develop ultra-high-performance backends using Python and FastAPI. You will master Anthropic Claude, implement advanced RAG architectures, and connect LLMs to company databases and APIs.The role emphasizes maintainability, security and performance, and offers the opportunity to shape...

Agicap à Lyon recherche un développeur back-end expérimenté, avec une forte expertise en TypeScript et Node.js. Vous aurez la responsabilité d'implémenter des architectures modulaires et de fixer des standards de qualité avec vos tests.Nous offrons un environnement de travail responsabilisant, une rémunération comprise entre 55K€ et 70K€, ainsi...

A dynamic tech company in Île-de-France is looking for an experienced Back-end Developer to design and maintain high-performance solutions for a robust back-end platform. You'll be pivotal in transitioning from a monolithic architecture to a microservices system. The ideal candidate has 5+ years in software engineering, with expertise in PHP (Symfony) and...