Top Software Engineer Jobs in Paris

Build and evolve reusable software platform capabilities for GenAI applications, AI agents, knowledge retrieval, and cloud-native services. Design APIs, shared libraries, automation workflows, internal UIs, and agent-management tools. Improve AWS platform reliability, security, observability, and scalability while implementing RBAC, audit logs, health checks, versioning, metrics, and operational tooling. Collaborate with engineering and product teams to create reusable platform primitives and document platform standards.

Build and maintain hardened Ubuntu-based container images and the automated CI/CD pipelines to build, test, scan, sign, publish, and retire them. Integrate upstream open-source projects, ensure security and cloud-native compatibility, collaborate with cross-functional teams, document and share knowledge, mentor colleagues, and contribute to hiring. Work in a distributed agile environment with occasional travel.

Build and scale a blockchain data platform handling petabytes of on-chain data. Design and implement distributed systems, data ingestion/decoding pipelines, and performant SQL processing. Write production code (Kotlin, Go, Java, Rust), improve developer experience, automate operations (including AI-driven automation), and own platform components.

Develop high-quality software solutions, participate in Agile meetings, debug and validate code, and contribute to design discussions in a collaborative environment.

Develop and optimize algorithms for battery and renewable energy projects, analyze market data trends, and ensure algorithm performance.

As a Backend Software Engineer, you'll design scalable backend systems, optimize database performance, and collaborate with front-end and DevOps teams.

Contribute to Juju's development, collaborate with teams on distributed systems, debug issues, and enhance cloud automation features.

The Backend Software Engineer will design and implement communication systems for tactical C2 applications, ensuring seamless data flow and fault tolerance in challenging environments.

The Java Software Engineer will design and deliver robust components for Doctolib, collaborating with teams to improve the platform's performance, security, and usability while taking a leadership role in implementations and enhancements.

Design and build production-grade mission, behavior, and motion planning systems for autonomous ground support vehicles operating in airport environments. Responsibilities include selecting algorithms, defining planning-stack architecture, prototyping optimization and search-based approaches, collaborating with perception, controls, localization, and systems teams, promoting functional safety practices, and mentoring engineers.

As a Senior Software Engineer, you will design and develop the Metis system, ensuring operational integrity and quality, while addressing challenges in distributed systems and collaborating with teams.

Design and develop the Metis system, ensuring its quality in a remote team while operating and maintaining distributed systems.

Software Engineers at QuantCo will design and develop scalable solutions, integrate models into client businesses, and improve products based on client feedback.

As an Ubuntu Core Software Engineer, you will design and implement features for the embedded Linux operating system, maintain boot mechanisms, debug system-level issues, and collaborate with a global team.

Performs software and system safety analyses for autonomous vehicle platforms, including HARA, FMEA, FTA, STPA, freedom-from-interference, and code-level hazard evaluations. Derives and traces safety requirements, defines fail-safe mechanisms, reviews safety-critical C++ and Python code, supports safety-case development, and collaborates with robotics, hardware, systems, software, and test teams to verify compliance and enable airport deployment.

As a Software Engineer at Polar Analytics, you will build core systems, manage data pipelines, and innovate solutions for eCommerce brands while engaging with users to improve reliability and performance.

Design and implement backend trading services, own features end-to-end (schema, API, tests, UI integration), contribute to real-time infrastructure and client-facing APIs, and write integration tests against real dependencies.

Full-stack Developers at QuantCo build user interfaces for machine learning solutions, collaborating with data scientists and engineers to deliver actionable products.

Build and maintain DataDome's client-side JavaScript Tag and server-side integration modules for edge runtimes and backend platforms. Own integration components across multiple languages, improve CI/CD, testing, performance and security, mentor engineers, support onboarding and incident response, and drive technical direction for integrations.

Lead design, develop, deploy and support a performant Python backtesting framework for quants, traders and researchers. Provide technical leadership, define architecture and roadmap, ensure code quality and automated testing, collaborate with stakeholders, and grow a global team supporting quantitative index strategies.

Work on the Xet Storage team building and operating the Xet storage backend and xet-core (Rust) and hf-xet (Python). Design, implement, and operate high-performance, scalable storage systems, contribute to open-source, and support production monitoring, alerting, and distributed debugging in a remote, fast-moving environment.

Build and scale backend services, integrations and AI-powered workflows for an insurance-focused product. Own features end-to-end, improve system reliability, performance and observability, work with unstructured data and production constraints, and collaborate closely with founders and users to turn feedback into shipped product improvements.

The Software Engineer will collaborate with project teams to define requirements, develop, test, and maintain software, particularly in C#.NET and web services.

Build and maintain integrations for North's agentic platform, own the end-to-end integration pipeline, create evals and tests to ensure reliability, tune tool descriptions, and help other engineers add and maintain integrations while using AI responsibly to improve performance and quality.

Embed with strategic customers to design and deliver end-to-end technical solutions. Collaborate with customer engineers and executives, build integrations, own execution, and solve complex problems using code and software architecture.