Senior Software Engineer

Senior Network/Software Engineer (Backend + Networking)

We’re hiring a Senior Software Engineer (Networking) to join a team building an open-source platform that helps companies create secure, high-performance networks.

You’ll take the lead on building and improving high-performance networking systems across Windows, macOS, and Linux, and work hands-on across the backend—especially in Go (and other backend languages).

What you’ll do

• Build, maintain, and optimize high-performance networking/backend code
• Own technical decisions and help shape architecture and direction
• Collaborate through code reviews, design discussions, and technical problem-solving
• Improve the product and contribute to a fast-moving engineering culture
• Support the open-source community by responding to GitHub issues and helping users
• Occasionally join technical calls with customers to understand and solve real-world needs

What we’re looking for

Must-Haves

• 5+ years of professional software engineering experience
• 2+ years building production systems in Go (Golang) and/or other backend languages (e.g., Python, Java, Node.js/TypeScript, C/C++, Rust)
• Strong backend engineering fundamentals and distributed systems experience
• Deep networking knowledge: protocols, routing, tunneling, VPN concepts
• Experience improving network performance, monitoring, and reliability
• Strong understanding of multi-threading and async programming
• Solid testing practices (unit + integration)
• Strong communication skills and collaborative mindset
• Fluent English

Nice-to-Haves

• Hands-on experience with VPN solutions
• Experience with REST and/or gRPC APIs
• Automation/scripting mindset
• Experience maintaining widely used production software
• Cloud experience
• Open-source contributions

What’s in it for you

• Competitive salary + equity
• Hybrid setup (Berlin office + remote flexibility)
• Collaborative team that values clean execution and fast shipping
• High ownership and autonomy (outcomes > hours)
• Growth opportunity in a company driving the future of Zero Trust security