Senior Infrastructure Engineer - Proxy Network

Our proxy network is the beating heart of the platform - residential, ISP, mobile, and datacenter proxies serving billions of requests, with rotation, geo-targeting, and IP reputation management underneath every one of them. We're looking for an Infrastructure Engineer to go deep into that layer: build and own core proxy and networking infrastructure, not configure someone else's. You bring the same range as our core infrastructure engineers - proxies and networking, browser internals, and cloud-native systems (Kubernetes, Docker, AWS) - with the depth to design and debug at every layer of the stack, plus a genuine specialization in networking and proxy systems.

Requirements: • 8+ years of engineering experience. • 2+ years of hands-on experience with proxy infrastructure. • Deep, hands-on networking expertise - TCP/UDP, sockets, HTTP/HTTPS/SOCKS5, HTTP/2/3, DNS - at the protocol level, not the surface level. • Proven experience building (not just configuring or integrating) proxy or networking infrastructure - reverse proxies, rotation systems, IP reputation and quality management. • Working knowledge of proxy types - residential, ISP, mobile, datacenter - their characteristics, trade-offs, and failure modes. • Comfortable in the Linux networking stack: iptables, routing tables, network namespaces, connection tuning. • Experience with high-throughput, low-latency, high-scale systems, and the debugging skills to chase a problem down to a packet trace when needed. • Solid cloud infrastructure skills - Kubernetes, Docker, and IaC (Terraform) - to ship and operate what you build. • A genuine AI-native mindset - daily, expert use of AI-assisted development tools to move faster without sacrificing correctness. • Strong software engineering ability in Node.js, Rust, Go, or Python - you design and build production microservices, not just scripts and runbooks. • Experience with data infrastructure at scale - high-throughput pipelines and storage (nice to have).