Senior R&D Engineer

Stack

Responsibilities

• ▹Build custom VPN tooling and services for server infrastructure
• ▹Integrate new and emerging VPN protocols into the platform
• ▹Develop internal tools and tech stacks for new product features and subscriber growth
• ▹Write production-quality code in Python, Rust, Go or similar
• ▹Work on server builds, provisioning pipelines and deployment automation for a globally distributed network
• ▹Harden and secure server infrastructure
• ▹Tune Linux systems and networking for performance and reliability
• ▹Lead technical research and prototyping for new capabilities
• ▹Use and evaluate AI tooling in the development workflow

Requirements

• ▹Proficiency in at least one of: Python, Rust, Go
• ▹Writing code daily, not occasionally
• ▹Strong Linux knowledge (kernel, networking stack, systemd)
• ▹Solid understanding of networking fundamentals (TCP/IP, DNS, TLS, routing)
• ▹Familiarity with VPN technologies or tunnelling protocols (WireGuard, OpenVPN, IPsec)
• ▹Experience building tools, services or automation, not just consuming them
• ▹Security-conscious approach to everything built
• ▹Ability to work independently in a small team with minimal process
• ▹Track record of shipping software that solved real problems
• ▹Fluent English (Upper-Intermediate or above)

Nice to have

• ▹Experience with cryptography or TLS (key management, certificate infrastructure, protocol internals)
• ▹Experience building or customizing Linux distributions or server images
• ▹Familiarity with infrastructure-as-code (Ansible, Terraform)
• ▹Monitoring and observability experience (Prometheus, Grafana, time series databases)

Soft skills

About the company

The client is a profitable, Silicon Valley-based B2C product startup building innovative mobile solutions. Its flagship product, Super Unlimited Proxy VPN, has over 44M MAUs and ranks #1 for the keyword 'VPN' in the iOS App Store in 32 of 40 tracked countries.