Top Software Engineer Jobs in France

Provides technical leadership for Python-based AI backend platforms supporting LLM integrations, generative AI pipelines, and agent orchestration. Architects scalable AWS systems using FastAPI, Lambda, and EKS; establishes observability and engineering standards; drives performance, security, and reliability improvements; mentors engineers; and influences organization-wide technical strategy, platform capabilities, and best practices.

Build production front-end applications for real-time maritime monitoring and control. Develop scalable client-side architectures for telemetry, time-series data, alarms, geospatial information, and equipment state. Implement low-latency streaming data interfaces, reusable UI components, and high-performance dashboards. Collaborate with operators, support live deployments and testing, and improve interfaces using field feedback. The role emphasizes React, TypeScript, data visualization, frontend performance, and dependable systems for high-stakes maritime operations.

Develop and maintain high-performance, containerized CRM systems using Go, microservices, and cloud technologies. Responsibilities include migrating legacy PHP services to Go, designing resilient architectures, identifying technical risks, improving development tooling and delivery processes, documenting solutions, and contributing to Agile planning and technical decisions. The role also involves mentoring teammates, evaluating innovations, and collaborating with technical stakeholders. Fluency in French and English is required, with hybrid remote work available.

Internship opportunity for a UI Software Engineer at Murex, a global fintech company developing trading, risk management, and processing solutions for capital markets. The role offers exposure to innovative financial technology, collaboration within a global team, and opportunities to learn and contribute to Murex’s platform used by financial institutions worldwide.

Develop and enhance custom software solutions using MuleSoft and modern frameworks. Own software components, ensure quality and performance, contribute to architecture and design decisions, collaborate with cross-functional teams, solve complex technical problems, and mentor less experienced developers. The role requires onsite work three days per week in Plano, Texas, plus five days away per quarter.

Build and optimize Pelico’s Java-based ETL backend for large-scale manufacturing data processing. Design scalable distributed services, integrate APIs, improve database and deployment performance, and ensure data integrity, security, and availability. Write clean, testable code; lead unit, integration, and performance testing; troubleshoot issues; collaborate with DevOps and cross-functional teams; and mentor junior engineers. Experience with AI-assisted workflows is expected, while manufacturing-sector experience and mentoring are preferred.

Build and improve Firefox WebCompat internal dashboards, reporting tools, and broken-site screenshot capture pipelines. The role involves creating reliable data views for triage and metrics, automating screenshot workflows, collaborating with WebCompat and QA teams, and translating reporting needs into effective tooling. Familiarity with WebCompat workflows, Bugzilla, screenshot automation, and machine learning is preferred.

Improve Firefox Gecko’s Session History health by writing Web Platform Tests and Gecko mochitests, fixing test failures and code issues, debugging a mature browser-engine codebase, and collaborating through code review and upstream landing.

Design, implement, test, review, and release reliable onboard spacecraft software for Hyperdrive, including mission logic, fault detection, recovery, lifecycle management, and spacecraft interfaces. Contribute to architecture and development standards, coordinate releases with downstream teams, and participate in operating Loft’s on-orbit satellite fleet.

Develop and maintain onboard software integrating spacecraft peripherals and payloads with standardized satellite APIs. Responsibilities include software design, implementation, code reviews, testing, architecture contributions, Git-based collaboration, continuous integration, release coordination, and supporting operation of Loft’s on-orbit satellite fleet. The role requires C/C++, Python, distributed systems, networking, POSIX, multithreading, build systems, and prior team leadership experience.

Architect and develop production-grade business systems across Salesforce, NetSuite, and integrated enterprise platforms. Build quoting, subscription, and entitlement engines; create automation pipelines and API integrations; establish architecture, security, documentation, and code-review standards; and translate commercial policies into scalable technical solutions. The role partners with Finance, Sales Operations, Customer Success, and product stakeholders while maintaining system reliability, auditability, observability, and production readiness.

Six-month software engineering internship developing and testing C++ components for Murex’s MX.3 capital markets platform. The intern may work on low-level development, algorithms, distributed systems, observability, OpenTelemetry, programming languages, compilers, static analysis, diagnostics, and software reliability. Responsibilities include analyzing architectures, improving performance and maintainability, collaborating with engineers and architects, and documenting technical solutions.

Six-month software engineering internship developing and testing Java components for Murex’s large-scale financial platform. Responsibilities may include backend services, distributed systems, performance optimization, data processing, monitoring, CI/CD, workflow tools, software architecture, and AI-assisted engineering. Interns analyze existing systems, improve reliability and maintainability, collaborate with experienced engineers, document solutions, and present findings. The role is based in Paris and requires strong Java, object-oriented programming, analytical, communication, and teamwork skills.

Design, develop and maintain robust backend APIs, manage the API landscape, collaborate on B2B solutions, and align architecture with product strategy.

Create and optimize Unity-based playable ads by converting mobile games into interactive experiences. Build customizable templates, integrate analytics, improve scalability and performance, and collaborate with creative and cross-functional teams. The role involves testing new tools, analyzing ad performance, benchmarking competitors, and developing innovative advertising experiences for mobile games and apps.

Six-month software engineering internship focused on backend or full-stack development. Interns build high-scale, low-latency systems, web applications, APIs, data pipelines, or data-quality solutions while collaborating with mentors and applying software engineering best practices.

Build and maintain Ergodic AI’s AI platform across back-end and front-end systems. The role involves developing with Python web frameworks and JavaScript/TypeScript, integrating with client technology stacks and workflows, applying AI, ML, and LLM concepts, and contributing to DevOps, cloud deployment, testing, and infrastructure practices. As an early-stage hire, the engineer will help shape the product and solve complex data and AI challenges.

Integrate and deploy robotics AI software across humanoids, mobile manipulators, and industrial arms. Responsibilities include designing ROS 2 architectures, implementing controllers, containerizing systems with Docker, integrating vendor SDKs, building system-level testing pipelines, debugging hardware/software interfaces, commissioning customer deployments, and improving reliability, observability, and autonomous operation. The role is based in Paris and requires approximately one week of travel per month, primarily within France.

Design and build a scalable forecasting platform handling diverse data types; develop real-time exploration tools, secure APIs and SDKs; implement monitoring, alerting, and data scraping automation; integrate ML models into pipelines; iterate from user feedback; and mentor early engineering hires.

Build and maintain full-stack web features and microservices for a cloud-native healthcare platform. Develop production RAG pipelines and LLM applications for genomics interpretation, including prompts, structured outputs, evaluation, citation verification, and guardrails. Lead design and code reviews, mentor engineers, prototype new products, and collaborate with Product, QA, Architecture, and PMO while meeting regulatory needs.

Develop motion planning, decision-making, vehicle control, and estimation algorithms for autonomous vehicles. Implement real-time C++ on embedded automotive hardware, build Python and C++ simulation tools, integrate planning with perception, validate software on vehicles, analyze field data, define safety metrics, and improve driving behaviors. The role requires strong software fundamentals, robotics or controls expertise, and experience deploying production-quality systems.

Build and operate backend services supporting millions of emails. Own features end to end, design reliable distributed systems, scale APIs and databases, manage cloud infrastructure, improve observability and deployments, and participate in on-call rotation. Collaborate with customers and support to improve the product, strengthen engineering quality, and deliver complete experiences across the stack.

Design and implement scalable software solutions supporting research workflows and data analysis. Lead technical decisions, develop microservices and APIs, establish engineering standards, optimize cloud infrastructure, and promote CI/CD and DevOps practices. Collaborate across teams, mentor junior engineers, contribute to testing and architecture, and help build an innovative engineering culture within Sanofi’s R&D organization.

Develop reliable, maintainable, and well-tested backend software in Golang within a microservices architecture. Participate in the full feature lifecycle, from design through production and maintenance. Collaborate with engineers through code reviews, technical discussions, and RFCs, while partnering with Customer Success and Support to improve user experience. Engineers deploy and operate their own services in a DevOps-oriented environment using scalable data and messaging technologies.

The Software Engineer will design, develop, and maintain backend APIs, enhance backend architecture, and collaborate on B2B solutions while ensuring performance and scalability.