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ZeroTier · 4 weeks ago

Staff Software Engineer – Low-Level Networking Agent

United States

Full-time

Remote

Lead/Staff

ZeroTier is a leader in next-generation connectivity and cybersecurity, providing secure, peer-to-peer virtual networks for millions of users and businesses. They are seeking a Staff Software Engineer to build and maintain the ZeroTier client, focusing on networking, distributed systems, and systems-level engineering to ensure reliable connectivity across various platforms.

Cloud InfrastructureCyber SecurityInformation TechnologyMobileNetwork SecurityVirtualization

Responsibilities

Participate in design and implementation strategies to enhance and improve ZeroTier’s networking agent

Develop and maintain communication primitives using protocols such as TCP and UDP, as well as custom transport layers

Implement secure tunneling, NAT traversal techniques, and robust reconnection/keepalive mechanisms

Work with low level, OS-specific operations (sockets, netlink, firewall rules, etc.) to optimize data paths

Profile and optimize network performance (latency, throughput, connection reliability)

Build cross-platform abstractions enabling the agent to run in varied environments

Write clean, maintainable, well-tested code and contribute to architecture documentation

Collaborate with cross-functional teams on system design, threat modeling, and deployment strategies

Qualification

CC++RustNetwork protocolsLinuxWindows internalsNAT traversal techniquesPerformance profilingStartup experienceTechnical documentationCollaboration skills