Top Software Engineer Jobs in France

Build foundational agent infrastructure for an AI assistant: orchestration, tool execution, context management, evaluation, and trust/permissions. Ship reliable, observable, and secure backend systems, launch agentic features, own core infrastructure, participate in on-call, and mentor others.

Design and build platform tooling to improve developer experience: create CLI, libraries, IaC, workflows and cloud-native solutions; PoC and deploy standards; support cross-team adoption, document and advocate best practices.

Build and operate CI/CD pipelines, cloud and on-prem infrastructure, and containerized platforms. Develop automation, tooling, and test software in Python/Java, maintain PostgreSQL, support semiconductor test engineering, improve monitoring/security/developer experience, and collaborate across engineering teams to troubleshoot and optimize workflows.

Design, develop, and maintain high-quality web applications using CodeIgniter and PHP. Collaborate with cross-functional teams to define and ship features, ensure application performance and quality, identify and fix bugs, and maintain code quality and automation.

Own and improve Langfuse SDKs (Python and TypeScript), ensuring reliability, performance, API design, integrations with AI frameworks, OpenTelemetry support, documentation, and developer experience.

Lead optimization of concurrent systems, scale backend microservices, and collaborate with developers and engineers on deployment for retail solutions.

Develop and improve algorithms for automated treatment-planning software using modern C++ (C++17+). Work in an agile team, engage with clinical experts and product owners, design and implement complex algorithms, create prototypes, participate in architecture and code reviews, write tests and technical documentation, follow medical-device regulatory guidelines, mentor peers, and support production monitoring and maintenance.

Develop, test, and deliver C++ features for a Windows-based 3D CAD system and supporting cloud services. Implement and prototype functionality, improve algorithms for performance, write unit tests, participate in code reviews, and collaborate with QA, product, and cross-functional teams to clarify requirements and ensure high-quality releases.

Lead design and execution of test plans for 3D CAD applications, APIs and AI features. Develop and maintain Python-based automated tests, manage datasets for AI, validate AI algorithms, set up CI, perform non-functional testing, analyze results, and collaborate with cross-functional teams to ensure production-ready releases.

Develop and improve algorithms for automated treatment planning software for Invisalign. Participate in end-to-end development, design, prototyping, code reviews, testing, documentation, and production support. Collaborate with clinical experts and product teams, implement complex algorithms in modern C++17 with full test coverage, follow medical-device regulatory and quality guidelines, mentor other developers, and drive performance, reliability, and architectural improvements.

Lead end-to-end design and delivery of customer-facing features in C++ and Go, implementing high-performance 3D geometry and numerical algorithms, owning architecture and technical decisions, mentoring engineers, coordinating cross-team dependencies, ensuring testability and regulatory traceability for medical software.

Build and ship browser-based 3D interactive features using React, Three.js, and WebGL; integrate frontend with a C++ computational backend on AWS; use AI tools (Claude Code) to accelerate development; prototype AI-powered product features; and collaborate with clinical scientists, UX, ML engineers, and QA.

Develop and modernize clinical research software using C++ and Go; maintain legacy code, implement unit/integration tests, ensure regulatory compliance, collaborate with cross-functional teams, and use AWS, Kubernetes, Docker, and CI/CD in an Agile/Scrum environment.

Lead end-to-end delivery of customer-facing features, designing and implementing 3D geometric and numerical algorithms in C++, contributing to Go backend services, leading architecture decisions, mentoring engineers, collaborating with QA/SQA, and maintaining regulatory traceability for medical software.

Develop and maintain RESTful microservices using Java 17 and Spring Boot. Implement SQL logic on PostgreSQL/Oracle, integrate messaging via RabbitMQ/Kafka, and use ELK for logging. Write unit and integration tests with JUnit, Mockito, and Spring Test. Collaborate on CI/CD and containerized deployments.

Improve reliability, observability, and scalability of Enode's connectivity layer. Build and maintain API integrations with OEMs and energy partners, reduce incidents, enhance monitoring and alerting, drive complex projects to release, uphold code quality and testing, collaborate with product, and mentor teammates while applying AI tooling strategically.

Design and build the XTM One core platform as a Senior Full Stack Engineer using TypeScript and Python. Define architecture for AI integrations, implement visualization flows, logging, and agent configuration, prototype rapidly, engage with the open-source community, and help create development processes and team culture.

Lead the Costing Framework EU squad: provide technical leadership, manage and mentor engineers, drive product alignment and delivery, maintain operational excellence, remove blockers, and represent the team to stakeholders to ship and maintain high-quality billing systems for metered energy.

The Senior Software Innovation Engineer transforms business-driven ideas into software solutions, validating prototypes and ensuring alignment between business and digital teams.

Lead design and development of Windows desktop applications, enforce coding best practices, oversee accessibility efforts, collaborate on UX, and manage complete feature lifecycle.

As a Senior Software Engineer, you will build scalable distributed systems, improve developer experience, mentor peers, and lead incident responses.

As a Database Engineer, you will design database architecture, manage system interfaces, improve continuous integration, and update database features for compliance with aerospace regulations.

The SDET will ensure quality for cybersecurity features by designing test strategies, building frameworks, and conducting various tests within a remote team setting.

Develop cloud-native production systems that process large data volumes. Engage in backend development with Rust and frontend with Angular. Collaborate on product development.

As a Senior Software Engineer, you will enhance the Patient Online Booking feature, lead technical vision, and ensure application performance and security while collaborating with cross-functional teams.