Top Software Engineer Jobs in Paris

Software Web Developer Intern contributing to modern web portals for internal administrators and external users. Responsibilities include gathering requirements, designing interfaces, integrating APIs and services, developing front-end and back-end components, testing features, engaging stakeholders, and documenting progress. The role combines web development with distributed systems and scientific computing in a Linux, Hadoop, Spark, and containerized environment.

Design, develop, and optimize highly scalable backend microservices for a real-time online gaming platform. Build APIs and data models, implement event-driven distributed systems, maintain high availability and performance, and deploy services in AWS. Responsibilities include testing, monitoring, troubleshooting, architecture documentation, code reviews, and collaboration with infrastructure, frontend, data, security, and product teams.

Own the design, development, and delivery of complex ERP features, backend services, APIs, data models, and user-facing functionality. Ensure reliability, performance, data integrity, and maintainability across production systems. Collaborate with Product and engineering teams, lead incident resolution, conduct code reviews, improve testing and monitoring, and mentor intermediate developers. Contribute to architecture, technical planning, hiring, and safe deployment practices including feature flags, incremental rollouts, and data migrations.

Own the architecture and long-term direction of Alpaca’s Redpanda-based event streaming platform. Lead migration to event-driven systems, design scalable real-time client streaming, establish schema and library standards, shape authentication for streaming, partner on resilience and testing, mentor engineers, influence cross-team technical decisions, and participate in platform on-call. The role primarily uses Go and involves Kubernetes, Helm, PostgreSQL, observability, and distributed systems.

Maintain and evolve the Storybook codebase, designing APIs for developers, addon authors, and maintainers. Responsibilities include issue triage, pull request reviews, RFC development, educational content, community engagement, cross-team collaboration, and support rotation participation. The role requires strong web development experience, knowledge of frontend frameworks and build tools, excellent communication, and enthusiasm for improving developer experience and AI-assisted development workflows.

Build and operate production custody systems: signing service, key management, chain integrations, and transaction pipelines. Own end-to-end subsystems, integrate new chains, collaborate with cryptography on threshold signing and key recovery, write post-mortems, and produce clear async design docs and PRs.

The Senior Software Engineer will design and implement systems for AI integration, build scalable backend services, and mentor team members, ensuring high-quality systems that meet user needs.

Build and scale backend systems for AI-native construction procurement software. Own data models, GraphQL APIs, distributed processing semantics, integrations with construction ERPs, authorization, approvals, and transactional business workflows. Develop in Go with Postgres and AWS, while contributing to AI-driven document extraction, optimization, observability, and complex integrations. Collaborate in a fast-moving startup environment with evolving product requirements and strong ownership expectations.

Design, deploy, and operate scalable infrastructure across multiple cloud environments. Manage Infrastructure as Code with Terraform, CI/CD pipelines, containerized workloads, Kubernetes, configuration automation, monitoring, networking, security, troubleshooting, and cloud resource optimization. Collaborate with software and infrastructure teams to improve reliability, observability, automation, and cloud architecture.

Build core components of a diagnostic and personalization platform: backend data pipelines, frontends, services for genomic data ingestion, ML model integration, APIs, and cloud infrastructure. Collaborate with product and ML teams, iterate on prototypes and MVPs, and make architectural decisions supporting scalability and reliability.

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.

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.

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.

Build and maintain developer tools across SDKs, React Email, CLI, MCP, integrations, and supporting backend services. Collaborate on APIs, compatibility, testing, releases, documentation, and shared tooling. Support developers through GitHub issues and pull requests while designing reliable interfaces, error handling, and backward-compatible experiences. The role also involves operating systems with authentication, retries, rate limits, queues, monitoring, and error recovery.

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.

Own the architecture, development, deployment, security, and operation of Pelagon’s software platform for autonomous maritime systems. Build data infrastructure, processing and machine-learning workflows, APIs, operational tools, and customer applications. Deploy reliably on self-managed and customer infrastructure without managed cloud dependencies. Establish observability, resilience, cybersecurity, automated delivery, and integration across embedded systems and AI teams while mentoring engineers and leading technical decisions.

Develop privacy, anti-tracking, and threat-intelligence protections for Firefox and improve the Gecko browser engine. Build performant, maintainable C++, JavaScript, and Rust software focused on memory safety, concurrency, and low latency. Independently scope and deliver complex features, collaborate asynchronously across distributed teams, and communicate technical decisions clearly.

Design and deliver internal systems, Go services, APIs, data models, dashboards, visualizations, and LLM-powered workflow features. The role includes writing specifications, estimating work, code reviews, testing, documentation, security, performance, accessibility, and collaboration with nontechnical stakeholders. The engineer will handle sensitive people data, mentor colleagues, and improve team practices in a globally distributed environment.

Design, develop, and maintain high-quality web applications using CodeIgniter and PHP. Collaborate with cross-functional teams to define and ship features, ensure application performance and quality, identify and fix bugs, and maintain code quality and automation.

Builds software solutions for end users as a general full-stack engineer. The role emphasizes collaboration, ownership, accountability, fast-paced execution, adaptability, multitasking, rapid learning, and an ambitious, outcome-driven approach.

Design, build, test, monitor, and troubleshoot scalable payment and core banking services. Lead architecture and code reviews, guide technical standards, own products throughout the development lifecycle, and collaborate with engineering, QA, infrastructure, and product teams. The role focuses on payment APIs, processing, reconciliation, card acquiring and issuing, cash management, microservices, and resilient payment solutions.

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.

Build and maintain internal and public-facing APIs and services powering the Web App and developer experience. Develop API functionality, Admin API systems, WebSocket and REST behavior, and usage and billing integrations with Stripe. Investigate production issues and security vulnerabilities, write and review tested code, make technical decisions, and collaborate across engineering, Product, and Design teams.