Top Software Engineer Jobs in France

Develop efficient C++ software for brain-computer interface and wearable sensing products. Integrate sensor data acquisition and machine learning inference with real-time performance across wearable hardware and cloud backends. Build performance and algorithm-quality analysis tools, write tested code, and collaborate with embedded systems, hardware, software, and ML teams on system integration and technical tradeoffs.

Develop and maintain MongoDB’s distributed query execution engine. Responsibilities include implementing execution algorithms, adding query language features, improving database performance and robustness, developing diagnostics, writing and reviewing high-quality C++ code, testing, troubleshooting, and collaborating on complex software solutions.

Build and operate high-performance distributed systems for Datadog’s continuous profiling product. Design services that ingest, process, index, and store profiling data at large scale; collaborate with runtime engineers, data scientists, designers, and customers; own code from development through production; meet SLOs and quality standards; review architecture and guide technical trade-offs; and support integrations, user interfaces, and AI-enabled tools.

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.

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.

Build and maintain end-to-end ERP features across Django backend services and Next.js frontend applications. Develop models, APIs, database migrations, tenant isolation, and row-level security; understand legacy C++ desktop behavior; write tests, monitor production releases, conduct code reviews, and collaborate with senior and junior engineers. The role requires independent delivery, strong communication, attention to quality, and a focus on reliable, performant systems.

Design and build Go services for Telnyx’s serverless platform, function deployment pipeline, global control plane, and edge infrastructure. Own backend APIs, resource lifecycles, workload deployment, asynchronous workflows, observability, and reliability. Work with Kubernetes, distributed systems, relational databases, and multi-region services. Improve developer experience through APIs, CLI tooling, and clear error handling, while participating in on-call and diagnosing production performance and reliability issues.

Build and own the backend financial infrastructure for B2B lending and payments. The role covers loan application workflows, loan lifecycle payment processing, ledger logic, supplier disbursements, reimbursements, and collateral audit workflows. The engineer will partner with clients and business stakeholders, define technical requirements, deliver scalable distributed systems, and maintain transaction reliability, security, and correctness.

Design, automate, and maintain software for provisioning bare metal servers at scale. The role supports new availability zones and HPC projects, improves orchestration resilience and performance, and collaborates with networking, hardware, data center, and production teams. Responsibilities also include maintaining reliable, observable infrastructure and documenting operational processes.

Develop and maintain high-quality Java applications for capital markets. Responsibilities include translating business requirements into software, designing microservices, optimizing performance, resolving client issues, conducting code reviews, addressing technical debt, documenting systems, troubleshooting bugs, and contributing to Agile Scrum delivery.

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.

Develop and maintain Python APIs and services for a computer vision platform. Improve service speed, reliability, and GKE infrastructure; contribute to technical designs, coding, documentation, and agile development. The role works with Docker, RabbitMQ, PostgreSQL, Kubernetes, Flask, and cloud infrastructure while supporting vehicle damage detection products.

Design, build, deploy, and support cloud-native ecommerce applications using Java, Spring Boot, GCP, microservices, serverless technologies, and event-driven architecture. Develop CI/CD automation, secure services, automated testing, observability, and AI-assisted development capabilities. Contribute to architecture standards, cloud modernization, performance optimization, cost management, and application reliability while collaborating with cross-functional teams.

Build and operate foundational backend systems powering a globally distributed ecommerce search platform at massive scale. Responsibilities include designing high-traffic, highly available services, improving performance and reliability, managing deployment automation, capacity planning, observability, and production operations. The role involves working across the technology stack and collaborating within an ownership-driven engineering team.

Build, test, deploy, and support web applications using React, Next.js, TypeScript, and AWS. Contribute across the software development lifecycle, make pragmatic technical decisions, improve engineering practices, and collaborate with product managers, designers, and engineers. Champion performance, accessibility, security, quality, observability, and documentation while helping deliver the product roadmap.

Lead development of a NiDAR simulator using Unreal Engine 5, creating geo-referenced environments, physics-driven vehicles and vessels, weapon effects, sensor simulations, and video streaming. Integrate the simulator with backend and command-and-control systems, optimize performance, track Unreal releases, estimate work, manage risks, and mentor engineers. The role supports mission-critical safety and security applications across Windows, Linux, and macOS environments.

Lead Scrum and Agile practices while developing and maintaining customer-facing airline applications. Responsibilities include facilitating ceremonies, removing impediments, tracking delivery metrics, designing technical solutions, building full-stack applications with Java, Quarkus, and Angular, writing automated and end-to-end tests, supporting production systems, mentoring colleagues, and contributing to SAFe initiatives and technical standards.

Develop and optimize a QGroundControl-based Android control station using C++/Qt; integrate physical controls and hardware; port and maintain app across Android versions; manage deployments; collaborate with embedded, electronics, and QA teams for field validation.

Design, develop, and maintain scalable backend applications using TypeScript, Node.js, and NestJS. Collaborate across engineering, product, design, and frontend teams throughout the software development lifecycle. Integrate APIs, troubleshoot and optimize applications, document solutions, apply security best practices, and contribute to architecture and technology decisions. Provide technical guidance to junior developers while delivering clean, tested, and maintainable code.

Develop and maintain Salesforce-related components and full-stack technical solutions. Design, test, implement, and support Salesforce projects; assess technical and business solutions; create system and functional requirements; demonstrate features; support Salesforce developers; and serve as subject matter expert for Sales Cloud and the Donations Platform. The role also leads Agile Sprint teams and manages multiple concurrent projects.

Develop and maintain software features for transportation revenue-management solutions. Responsibilities include backend and frontend development, application monitoring, infrastructure management, technical-debt reduction, architecture improvement, and collaboration with product experts and data scientists to address customer and business needs.

Own backend development for video traffic enforcement and ANPR products across edge and cloud systems. Build camera integrations, edge services, APIs, event-driven workers, data layers, fleet orchestration, and resilient synchronization. Deploy and monitor systems on GKE, improve testing and reliability, handle production incidents, and contribute to architecture decisions. The role requires close collaboration on evidential integrity, GDPR, auditability, and retention requirements in a small senior team.

Build and operate full-stack systems for an AI-powered offensive security platform. Responsibilities include developing React frontends, TypeScript APIs, Kotlin and Go backend services, deploying on AWS, designing scalable systems, optimizing databases, supporting production, and owning features from concept through deployment. The role involves close collaboration with AI and security researchers in a fast-paced remote startup.

Lead the architecture and scaling of Datadog’s Autonomous Ops & Maintenance platform. Build reliable, fault-tolerant, horizontally scalable services for multi-tenant environments; transform technical datasets into structured knowledge; develop AI-driven components for operational workflow analysis; and automate software maintenance in mission-critical systems. Own features end to end, including reliability, observability, and operational quality, while collaborating with users and operating production services.

Build and maintain software for clinical AI medical devices across radiology modalities. Develop features, integrate systems, validate and route requests, assemble results, and support production services. Write and review code, create automated and manual tests, and own features through deployment. Ensure quality, regulatory, cybersecurity, documentation, and risk-analysis compliance while collaborating with product, service, and delivery teams.