Top Software Engineer Jobs in Paris

Lead design and implementation of an automation platform to orchestrate package creation, test generation, and image builds. Build LLM-integrated tooling, write production Go for CLIs and services, develop test generators and validation frameworks, and drive roadmap and engineering quality across a small team.

The Principal Software Engineer will define technical standards for the XTM Integration team, drive integration architecture, oversee open-source contributions, and write production code while leading by example.

As a Senior Software Engineer at Rewardful, you'll improve infrastructure, optimize performance, implement scalable solutions, and develop new features for our SaaS affiliate management platform.

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.

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.

The Senior Software Engineer will focus on backend development, designing and maintaining APIs and services, collaborating on features, and enhancing integrations at Motion.

Design and implement core Web3 protocol features and secure smart contracts in Solidity. Integrate blockchain solutions with cross-functional teams, ensure scalability and performance, stay current on EVM internals, conduct code reviews, and mentor junior engineers.

Design and implement a video processing engine, develop a cross-platform rendering engine, integrate systems, and optimize performance while collaborating with other engineers.

Design and build key features for an AI coding platform, focusing on user experience and product growth in a collaborative environment.

The role involves improving Firefox development workflows, mentoring team members, collaborating with other teams, and analyzing development data to enhance productivity.

Be the hands-on technical owner of the LiteAPI product: design, implement, and operate backend/API infrastructure, lead technical decisions, work closely with product, stakeholders, and customers, and mentor engineers while shipping high-impact features in a fast-moving startup.

Design, develop, and maintain Python and Go microservices for data ingestion and processing; integrate backend services with BigQuery and cloud data platforms; implement REST APIs; build scalable data processing pipelines using Apache Beam and Dataflow; test and troubleshoot distributed systems; review designs, estimate work, mentor junior developers, and drive performance and reliability improvements.

Develop core backend components for a blockchain network, focusing on reliability and scalability, mainly using Rust. Ensure code quality through testing and debugging.

The Senior Software Engineer will design and develop high-quality web and mobile applications, ensuring code quality while collaborating with product teams and mentoring junior engineers.

The Senior Full-stack Engineer will design and build features in TypeScript, driving projects with a product mindset and collaborating in a dynamic startup environment.

The Staff Software Engineer will lead technical direction, improving system design and mentoring others while writing code and collaborating across teams for a cloud-based generative coding platform.

Develop and maintain scalable backend services using Graph features; optimize systems performance and security; mentor team members; ensure compliance and quality standards.

Build foundational agent infrastructure for LLM-driven developer assistant: orchestration, tool execution, context management, evaluation, and trust/permissions. Ship reliable, observable backend systems, own core infra, participate in on-call, and mentor peers while launching agentic features to customers.

Design, build, ship, and own end-to-end product features across frontend, backend, and data. Translate ambiguous product requirements into reliable, well-tested systems; deploy, monitor, and maintain production services; participate in design and architecture, code reviews, and mentor peers while working closely with product and design teams.

Design and implement core cloud platform services, control-plane components, and internal APIs. Build platform abstractions and production-grade Go tooling, drive architectural initiatives (gRPC, eventing, cluster-api), improve scalability and developer experience, and support production incidents when needed.

Join the Kubernetes product team to design and implement Kubernetes operators and addons, write high-quality Golang and Python code, debug issues, collaborate with a distributed team, mentor colleagues, and contribute to open-source integration and lifecycle management. Travel 2–4 weeks yearly for team events.

Build and maintain a distributed, fault-tolerant, high-performance block and filesystem storage system. Work on virtualization (virtio-blk, virtio-fs, QEMU, vhost-user), high-throughput VM-to-storage networking (TCP, RoCEv2/RDMA), and core storage features like replication, consensus, self-healing, and data migration. Debug and optimize performance-critical I/O paths while writing reliable, maintainable code in a collaborative team environment.

Work on YDB distributed storage and database systems to maximize performance on modern and legacy hardware (NVMe, HDD, DPUs). Reengineer components for low-latency, high-throughput workloads, profile and debug production systems, and design resilient distributed storage primitives. Collaborate on incident resolution and production deployments to support Nebius cloud services.

Design, build, and deploy large-scale distributed systems and high-throughput data pipelines. Lead architecture and technical initiatives, ensure performance, resilience, and SLAs, contribute production-quality code, and mentor engineers while collaborating with product and R&D leadership.