Top Software Engineer Jobs in France

The Software Engineer will develop high-performance, real-time haptic systems, designing and optimizing engine components, and collaborating across teams for integration.

Develop and validate critical embedded real-time avionics software through the complete V-cycle, from specification and design through integration on final hardware. Apply DO-178B/C standards in a highly regulated environment, perform verification using probes, bus analyzers, and emulators, analyze failures, support technical queries, and improve engineering processes. The role focuses on low-level software for systems such as flight controls and requires C programming, DevOps methods, and English and French proficiency.

Design, build, and improve distributed clearing and securities-finance systems supporting brokerage products. Own projects from ideation through deployment, develop reliable APIs and integrations, refine existing infrastructure, and participate in on-call operations. The role requires strong systems fundamentals, attention to detail, financial-markets interest, and ownership of production systems handling customers’ money.

Design and build production-grade mission, behavior, and motion planning systems for autonomous ground support vehicles in airport environments. Responsibilities include selecting planning algorithms, defining software architecture, optimizing trajectories, handling uncertainty, collaborating with perception and controls teams, promoting functional safety practices, and mentoring engineers. The role requires strong C++ or Python skills, Linux experience, autonomous systems planning expertise, and the ability to independently solve complex technical problems.

As a Software Engineer, you'll design and develop software solutions, solve technical problems, lead projects, and collaborate with product and operations teams.

Own and productionize localization, mapping, calibration, and state-estimation systems for autonomous ground vehicles operating at active airports. Responsibilities include sensor fusion, 3D mapping, calibration, online validation, diagnostics, regression testing, deployment, and safety monitoring. The role provides technical leadership across perception, planning, and platform teams while advancing autonomous operations toward driverless capability.

Own financial partner integrations across crypto and fiat payment rails, including APIs, webhooks, reconciliation, and production hardening. Build automation for compliance, back-office operations, trading, treasury, liquidity routing, and risk controls. Establish engineering standards for idempotency, audit trails, fail-closed design, exact decimal arithmetic, and durable workflows. Mentor engineers and maintain secure, reliable systems handling real-money movement.

Owns field deployment of defense software by integrating platforms with customer systems, developing connectors, configuring and customizing applications, managing on-premises releases, troubleshooting operational issues, and documenting deployments. Works directly with customer technical teams, validates end-to-end data flows, and feeds reusable integration needs back to the core product team. The role requires substantial domestic and international travel and autonomous work in mission-critical environments.

Own backend services, APIs, infrastructure, and frontend dashboards for AI-powered healthcare voice agents. Design reliable, secure, scalable systems serving thousands of medical practices, deliver features from specification through production, improve developer tooling and observability, build modular multi-client architecture, and launch voice agents at scale. The role also contributes to engineering culture, code quality, mentorship, and future team growth while collaborating closely with founders, design, sales, support, and operations.

Lead quality strategy and testing for complex 3D/CAD/CAM manufacturing software. Responsibilities include defining test plans and quality gates, developing Python automation, conducting functional, integration, performance, and hardware-software validation testing, investigating defects, improving CI/CD quality practices, and mentoring QA engineers. The role collaborates across engineering and product teams to ensure reliable geometry-intensive applications throughout the software development lifecycle.

Build and scale Base360.ai’s short-term rental platform, including customer-facing applications, APIs, automation engines, AI-powered workflows, third-party integrations, and cloud infrastructure. Develop systems for reservations, pricing, payments, guest communication, property operations, reporting, and financial workflows. Own projects end to end, make architectural decisions, ensure reliability, and deliver scalable products in a remote-first startup environment.

Lead backend engineering for a SaaS platform: design architecture, build and maintain production REST APIs and relational databases using Python/Django, implement CI/versioning, and support real-time systems (Redis/WebSockets). Influence technical decisions, ship features quickly, collaborate across teams, and help recruit and lead engineers for energy and built-world applications.

Staff Software Engineer responsible for architecting and developing scalable web applications and APIs using Elixir, React, and PostgreSQL. The role involves solving ambiguous technical and business problems, ensuring system reliability and performance, collaborating cross-functionally, presenting solutions to leadership, writing tested code, participating in code reviews, mentoring engineers, and removing technical roadblocks.

Develops and validates AI/ML models for fiber test and measurement applications. Owns the end-to-end machine learning and signal-processing lifecycle, including data collection, preprocessing, feature extraction, model development, optimization, proof-of-concept and MVP validation, deployment, and production integration. Applies filtering, spectral analysis, noise characterization, statistical modeling, and time-series analysis to fiber network data while collaborating with international cross-functional teams.

Lead and coach a playable ads development team while remaining hands-on in producing and iterating playable creatives. Oversee workflows, tooling, and best practices; innovate ad formats; analyze competitor ads and performance data; collaborate with growth and creative teams; support rollout across game franchises; and shape team standards and processes.

Senior Software Engineer to design and implement C++/Python software, accelerate workloads with CUDA, develop and maintain Linux kernel modules and system services, optimize system and GPU performance, manage Linux systems, mentor junior engineers, and integrate AI technologies across products.

Maintain, monitor, scale, and modernize internal CRM, ERP, ticketing, and backend services. Develop Python and Go microservices, automate workflows, integrate business tools, and improve system reliability, security, and performance. Collaborate with Sales, Finance, Support, and Operations stakeholders; conduct code reviews, write tests, document architecture, and use Docker, Ansible, GitLab CI, and internal LLM tooling.

As a Senior Software Engineer, you'll enhance REDAPL, lead projects, focus on data ingestion and query pipelines, and ensure platform reliability.

Join a small agile full-stack team building cloud-native applications to accelerate medicine manufacturing and supply. Design, deliver, and run scalable, maintainable microservices; translate requirements into performant code; own technical decisions; apply CI/CD and DevOps practices; use IaC for cloud deployments; collaborate with product and data teams and promote engineering best practices.

Build and ship full-stack features for a data intelligence SaaS platform, spanning backend services and frontend interfaces. Use AI coding assistants to accelerate development while applying sound engineering judgment. Participate in architecture discussions, code reviews, testing, incident response, troubleshooting, documentation, and knowledge sharing. Partner with product managers to translate requirements into technical solutions. The role emphasizes SaaS architecture, AWS cloud fundamentals, Docker, Kubernetes, CI/CD, agile delivery, autonomy, and production ownership.

Lead architecture and code quality for payment plugins across six major e-commerce platforms. Establish PHP patterns, testing and linting standards, conduct code reviews, improve test coverage, harmonize cross-platform conventions, and mentor intermediate engineers. The role combines hands-on backend development, technical direction, continuous improvement, and collaboration with AI development tools. It is a permanent position based in Paris or remotely from Metropolitan France.

Design and develop Python backend APIs and payment infrastructure serving merchants and consumers across Europe. Build secure, maintainable, high-performance systems, evolve technical architecture with Product and technology leaders, and lead incident response and performance improvements. The role requires ownership of reliability at scale within a regulated fintech environment.

Design, implement, and review high-performance data infrastructure services and clients. Apply coding, testing, and system design best practices; collaborate with stakeholders to address technical and business needs; and investigate, debug, and resolve system issues. Work with large-scale data systems involving real-time publish-subscribe architecture, sharded databases, caching, multithreading, asynchronous I/O, and big data technologies.

Design and operate customer-facing networking APIs, Python orchestration control planes, and automation that configures routers across global points of presence. Build resource allocation, job queues, retries, rollback, reconciliation, BGP, WireGuard, GRE, NAT, firewall, DNS, cloud interconnect, and Envoy xDS integrations. Own production monitoring, incident response, billing synchronization, API compatibility, and network configuration drift detection across application and infrastructure layers.

Build and ship high-traffic frontend features for Sorare’s fantasy sports platform. Responsibilities include architecting web experiences, driving projects from inception through launch, collaborating with product, design, and backend teams, optimizing performance and mobile usability, measuring outcomes, and contributing to web strategy. The role requires strong ownership, pragmatic decision-making, rapid iteration, and collaboration in English and French.