Top Software Engineer Jobs in Paris

Design and build the on-prem software stack for ModelVault appliances: containerized inference engines, model integration (LLMs/vision), deployment tooling, CLIs/GUI/APIs, OS and GPU setup, remote updates, telemetry, and collaborate with customers and founding team to iterate and scale the engineering org.

Design, implement, and maintain Firefox security architecture and cryptography stack (WebPKI, cryptographic protocols). Build web platform security features, debug multi-threaded cross-platform native code, improve performance and memory usage, collaborate across teams, and contribute to technical design and standards-based implementations.

Build and maintain scalable cloud-based data management and processing systems for biomedical research. Own platform components end-to-end, drive architecture and standards, improve CI/CD, observability, security, performance, mentor engineers, and participate in on-call incident response.

Own and productionize core localization systems (state estimation, mapping, calibration). Build monitoring, diagnostics, validation, and deployment tooling. Integrate sensors, tune performance, run regression testing, and iterate using data from real autonomous airport operations to enable driverless capability.

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.

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, build, ship, and maintain end-to-end product features across frontend, backend, and data layers. Own projects from definition through production, improve reliability and scalability, collaborate with product and design, mentor engineers, and engage with customers to solve real user problems.

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

Design, develop, and maintain high-quality software solutions in C++ for financial services, collaborating within Agile teams and mentoring others.

The Senior Software Test Engineer will lead test engineering initiatives, design automated test frameworks, and advocate for quality within cross-functional teams.

Develop and maintain services for HPC Research Platform, focusing on scalability and reliability of compute workflows while collaborating with researchers.

Design, build, and maintain cloud-based data pipelines and infrastructure on AWS, integrating on-prem and cloud flows. Implement IaC, CI/CD, containerization, observability, and automation to ensure high-throughput, reliable data ingestion and processing for autonomous systems.

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.

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, implement, test, deploy, and maintain cloud-native full‑stack applications. Collaborate cross-functionally, follow software engineering best practices, use event-driven patterns, leverage AWS, participate in code reviews, troubleshoot issues, and improve CI/CD workflows.

Lead design and development of scalable, user-friendly iOS applications for clinical and customer use. Define technical architecture, implement and optimize features, build modular frameworks, ensure high quality via automated tests, apply Apple design and accessibility standards, and collaborate with cross-functional teams in agile processes.

Design, develop, and implement AI test infrastructure and long-term validation strategy. Build automation and CI/CD tests, validate AI interactions across Sonos devices and apps, collaborate cross-functionally, and report to the QA manager.

Design, implement, test, and maintain cloud-first web applications. Build secure, maintainable code using event-driven architecture and cloud services (AWS/Azure). Collaborate with cross-functional teams, mentor junior engineers, and support CI/CD and PWA development.

Develop user interfaces for a tactical Command and Control system, focusing on real-time data visualization, video streaming, and mission planning tools while ensuring optimal performance and user experience.

The Senior Software Engineer will develop solutions at the intersection of product, engineering, data, operations, and AI, focusing on enhancing user experience and operational efficiency for restaurants.

Lead and implement architecture and code for resilient backend systems, embedded hardware, secure networking, and ML inference at the tactical edge. Mentor engineers, run code review and RFC processes, optimise performance and reliability, and drive cross-team technical initiatives from prototype to production.

Design, build, and harden Chromium-based browser components in C++ to power Menlo's AI/agent initiatives; apply networking and HTTP security expertise; integrate AI agents and MCP servers; build tooling in Python or Rust; deploy and operate cloud infrastructure (AWS/GCP, Kubernetes, Terraform); debug and optimize performance-critical systems; collaborate cross-functionally.

Design, build, and operate Threat Protection and ShadowAI services: scalable distributed systems and APIs that detect and control risky web and generative AI usage. Own features end-to-end, maintain availability and latency SLOs, write tests, perform code reviews, use AI-assisted tools, and collaborate with cross-functional teams to improve detection accuracy and production reliability.

Lead and design scalable backend systems, set technical vision, drive large cross-team projects, raise engineering standards, mentor engineers, and influence company-wide architecture and processes to support product growth and AI initiatives.

Build and own backend integrations connecting Voxie's SMS platform to CRMs, POS, marketing tools, and messaging providers. Design scalable, testable serverless systems on AWS, handle high-throughput messaging, implement reliable API/webhook/SFTP/batch pipelines, and collaborate with sales, partners, and customers to scope and deliver integrations.