Embedded Networking Software Engineer

As part of the launch of new strategic projects, we are strengthening our Software Networking team. You will join a small, dynamic group of 6 people, based in France, responsible for developing networking software solutions that span the entire stack, from hardware-level drivers to cloud-scale virtual switching.

Your main responsibilities will include:

Leading and contributing to:

• Design, develop, and optimize networking software for our cutting-edge DPU platform.
• Create and maintain low-level software, including MAC/PHY drivers and packet forwarding engine firmware.
• Develop and enhance Linux kernel drivers to support network offloads and hardware acceleration features.
• Implement and optimize data plane solutions utilizing the Data Plane Development Kit (DPDK) and Open vSwitch (OVS).
• Build and maintain robust, scalable, and automated test frameworks using Python to ensure software quality and performance.
• Collaborate closely with hardware and system architecture teams to define requirements, design software interfaces, and debug complex, system-level issues.
• Profile and analyze system performance to identify and resolve software bottlenecks.

• Strong proficiency in C programming and experience with large-scale software development.
• Solid experience with Linux kernel development, device drivers, or similar low-level programming.
• Proficiency in Python for scripting, automation, and test framework development.
• Good understanding of fundamental networking concepts, including TCP/IP, Ethernet, network protocols and packet forwarding techniques.

Nice to have:

• Hands-on experience with the Data Plane Development Kit (DPDK) framework.
• Familiarity with Open vSwitch (OVS) architecture and hardware offload mechanisms.
• Experience with low-level hardware interfaces, such as MAC/PHY components.
• Knowledge of virtualization technologies like SR-IOV and KVM.
• Experience with performance tuning and optimization of networking data planes.

Profile:

• Master's degree or PhD in Computer Science, Computer Engineering, or a related technical field.
• At least 3 years of experience in embedded software engineering.
• Excellent analytical and problem-solving abilities.
• Strong communication skills and ability to work effectively in a collaborative team environment.
• A proactive and self-motivated approach with a strong sense of ownership.
• Passion for learning new technologies and tackling complex engineering challenges.

• Competitive salary & performance-based RSU (free shares)
• Hybrid work model
• Additional paid leave (RTT)
• Meal vouchers (Edenred)
• Premium health coverage (Malakoff Humanis)
• Sustainable mobility incentives
• Generous paternity leave
• Monthly team activities (laser game, hiking, sailing, karaoke …) and large-scale company events

Kalray is a European leader in hardware acceleration, with full-stack acceleration expertise: from silicon to complete system. Our MPPA® (Massively Parallel Processor Array) architecture is the foundation of Kalray's processor (30+ patent families, 15+ years of development) and acceleration cards that combine processing power, flexibility, and energy efficiency. Our mission is to deliver open data-efficient hardware accelerators to power next generation of data-intensive, AI-driven systems and infrastructures. We offer off-the-shelf processors, acceleration cards, and specialized processor development. With over 130 employees and presence in France and Romania, Kalray is backed by top-tier investors and publicly listed on Euronext Growth. You'll be part of a pioneering team that is shaping the future of computing with cutting-edge processor architecture, software-defined solutions, and next-generation acceleration platforms.