Top Software Engineer Jobs in France

Work on YDB distributed storage and database systems to maximize performance on modern and legacy hardware (NVMe, HDD, DPUs). Reengineer components for low-latency, high-throughput workloads, profile and debug production systems, and design resilient distributed storage primitives. Collaborate on incident resolution and production deployments to support Nebius cloud services.

Work on Percona's open-source MongoDB operational tools (primarily ClusterSync and also Backup). Build and harden a Go-based replication engine handling initial cloning and continuous change streams, ensure correctness and fault tolerance at scale, support sharded clusters, optimize performance and resource usage, and maintain CLI/HTTP APIs, metrics, logging, tests, and packaging. Collaborate openly via GitHub pull requests and JIRA.

Join Doctolib's Clinical DOPE team to design and implement fullstack features for prescription lifecycle, collaborate with product and design, ensure performance, security, and testability, integrate external drug databases, and improve medication alerting across France and Germany.

Build, design, and ship MCP servers for customers end-to-end. Translate company vision and customer feedback into production features. Perform design, coding, QA, and customer support independently while following MCP best practices. Work closely with customers to deliver reliable, maintainable agent-ready infrastructure.

Work directly with founders to build and iterate the first versions of an MCP hosting platform. Implement features, deploy and monitor MCP servers at scale, and help ship production-ready infrastructure and web tooling for AI-native agent workflows in a fast-paced startup environment.

As a Growth Software Engineer, you will scale user and business growth through experimentation, data-driven development, and cross-functional collaboration, particularly in user engagement and retention.

The AI Software Engineer will develop and improve Joko's AI shopping assistant, focusing on architecture, evaluation, data management, and personalized user experiences, while collaborating with product teams.

Develop core backend components for a blockchain network, focusing on networking, reliability, scalability, and high-quality software practices.

Develop and enhance front-end, server-side, and database applications, focusing on blockchain products while ensuring high performance and security.

As a Distributed Systems Engineer, you'll design and evolve LiveKit's core systems, implement resilient architectures, and enhance reliability and developer velocity, working on critical features in production environments.

Design and evolve core control, data, and observability systems; implement resilient region-spanning architectures; build libraries, protocols, and tooling; diagnose and harden critical paths using metrics, tracing, and testing; and shape platform capabilities across identity, scheduling, observability, and distributed state management.

The role involves designing and evolving core systems at LiveKit, implementing resilient architectures, and building tools to enhance system reliability and developer speed. Strong distributed systems experience and programming skills are essential.

Design, implement, and operate low-latency, highly available distributed control, data, and observability systems. Build region-spanning architectures, libraries, protocols, and tooling; diagnose and harden critical paths using metrics, tracing, testing, and real traffic; and shape platform capabilities around identity, scheduling, observability, and distributed state management.

Contractor will own well-scoped Django/Python engineering topics end-to-end: technical scoping, implementation, tests, docs, and delivery. Work within team flow (PRs, reviews, deployments), maintain production-grade quality (robustness, security, readability), communicate risks, and tackle projects like DB splitting, GitLab integration, prompt migration, and security backlog.

Join Eight Sleep as a Senior Android Software Engineer, focusing on optimizing mobile app performance and collaborating with various teams to enhance user experience.

Lead the development of Runware's serverless platform by building core systems for AI workload management and providing technical guidance to the team.

The Senior Software Engineer will design and implement systems for AI integration, build scalable backend services, and mentor team members, ensuring high-quality systems that meet user needs.

As a Senior Software Engineer, you will develop and manage a MongoDB solution on various platforms, ensuring reliability and security while contributing to a small team focused on impactful projects.

As a Senior Software Developer, you'll develop software solutions, mentor colleagues, advise clients, uphold development guidelines, and research new technologies.

Lead architecture and platform design for a quantum-computing software stack: design services, APIs, storage, data ingestion, and orchestration; enable hardware/software interaction loops; partner with researchers and data engineers; drive long-term roadmap and mentor engineering teams.

Build and improve Restream’s web interfaces and user-facing features for the AI Clips team. Design UI and business logic, collaborate with product designers, participate in code reviews, improve system reliability, and evaluate emerging technologies. The role requires strong JavaScript and TypeScript expertise, advanced React knowledge, CSS preprocessor experience, and familiarity with backend development, cloud infrastructure, containers, and continuous deployment.

Two-year rotational R&D program for an onsite Software Development Engineer in Saint-Etienne. The role develops and maintains fiber monitoring software, contributes across the full software lifecycle, collaborates with Agile, Security, DevOps, Marketing, and Engineering teams, and supports field issue analysis. Candidates need an engineering degree, French and English fluency, willingness to complete international rotations, and experience with Java, Spring, J2EE, TypeScript, web technologies, REST, databases, and Linux.

As a Senior Software Engineer at Swile, you will solve engineering challenges, design solutions, mentor others, and collaborate with teams to enhance user experiences.

Design and maintain embedded software and OS (Embedded Linux/RTOS) for UAVs, develop sensor drivers, integrate algorithms, improve telemetry and firmware, uphold coding standards, and collaborate with multidisciplinary teams to deliver field-ready autonomous systems.

The Embedded Software Engineer will lead Linux BSP development for video sensor integration, manage camera drivers, and validate hardware designs within a collaborative team environment.