Routing software development engineer

About 6WIND


6WIND is a Green Tech leader providing virtualized, cloud-native, distributed, high-performance, and secure networking software solutions. Our technology powers cutting-edge applications across AI, Broadband, B2B Cloud Services, and 5G.


Our mission is to deliver high-performance networking software with industry-leading cost-efficiency, security, and sustainability. With our Virtual Service Router Product Suite, customers reduce energy consumption by over 50%, minimizing carbon footprint without sacrificing performance or scalability.


Headquartered in Paris, Santa Clara, CA and Singapore, 6WIND serves a global customer base including CSPs, MNOs, Cloud Providers, Data Centers, and Enterprises.


6WIND is recruiting a top notch Routing Software Development Engineer, to join our R&D Department located in France (Paris region).


Our teams are composed of software engineering and computer networking experts, as well as mentors following Open Source best practices in their day-to-day work.

Code review and attention to code quality and design are key.


As a member of our Routing Software Development Team, you will be responsible for designing, developing, and optimizing network software that manages how data is routed across networks. This role is critical in building high-performance, scalable, and secure networking solutions.


Key duties and responsibilities:


* Design & Development of Routing Protocols
* Develop and implement network routing protocols such as OSPF, BGP, IS-IS, RIP, EIGRP, and MPLS
* Enhance and optimize routing algorithms for performance, scalability, and reliability
* Work on control plane software for Virtual Service Routers (VSR)
* Protocol Optimization & Performance Tuning
* Improve routing efficiency to reduce latency, packet loss, and congestion
* Optimize dynamic routing to adapt to changing network conditions in real time
* Implement load balancing and redundancy techniques (e.g., ECMP, fast reroute)
* Network Software Development & Integration
* Develop software for Software-Defined Networking controllers
* Integrate with network operating systems (NOS) such as FRRouting (FRR)
* Work with open-source networking stacks (e.g., Quagga, BIRD, VyOS)



Skills and qualifications:


* Engineering Degree or Equivalent in Computer Science
* At least 5 years of professional experience in software development
* Well versed in C and Python programming languages
* In-depth knowledge of Network Routing Protocols : BGP, OSPF, IS-IS, MPLS, SRv6…
* Comfortable with Linux and Open-source environments
* Strong multithreading and performance-oriented programming skills
* Experience in virtualization environments (KVM, Kubernetes, Docker, OpenShift...) is a plus
* Team spirit, technical curiosity, fast learning abilities
* Passionate about programming, computer networking and complex problem solving
* Comfortable with technical English
* Comfortable with French language


This position is available either in hybrid mode (2 days of remote working per week / 3 days onsite) or in full remote (from France) with travels every quarter to our French HQ located in Montigny le Bretonneux (78).