Rust Lead Senior Developer (Remote)

🌍 Remote (Asia–Europe overlap)

📄 Contractor, full-time

💰 Monthly base + quarterly profit-sharing

👤 Reports to CTO/Co-Founder

👥 ~8-person team

🌏 About anyIP

anyIP.io is a fast-growing proxy provider — affordable, high-quality residential and mobile proxies in 190+ countries. Built by engineers, loved by power users.

We're an AI-first company: we lean on AI across the whole stack — coding, reviews, debugging, ops, and tooling — to ship faster and punch far above our size. You'll be expected (and encouraged) to wield it daily.

🔥 The role

Be the technical owner of our proxy platform: a 100% async Rust codebase (~50k lines, multi-repo) doing tens of millions of requests/day.

The core is a hard distributed-systems problem — we coordinate a churning fleet of devices running our server as proxy and route live customer traffic through them over custom TLS + custom protocols. Your job: keep that fleet fast, reliable, and byte-accurately billed.

This is a hands-on lead role. You'll mostly design, code, review, and debug production systems — not manage a large team.

🛠️ What you'll own

• 📡 Peer-fleet coordination & reliability — lifecycle, keep-alive, health checks, circuit breakers, zombie-peer detection, QoS-aware archiving
• 🔌 Core protocol work — proxy, SOCKS5, UDP, QUIC, and load balancing under real traffic
• 💵 Usage-metering correctness — every byte billed once across HTTP/CONNECT/SOCKS5 TCP+UDP and client aborts, verified by E2E tests
• 🛡️ Security & abuse prevention — domain/SSRF/rate-limit policy, anti-DDoS, per-datagram checks on UDP (incl. QUIC SNI for HTTP/3)
• 📊 Reliability & observability — profiling, hot-path tuning, Prometheus/tracing, taming RabbitMQ event pressure
• 🧩 Clean service contracts (gRPC, binary protocols), CI/CD, Helm/K8s delivery, and code review

🧠 What we're looking for

• 5+ years professional Rust, with Tokio mastery
• Senior/lead experience on backend, infra, or systems work
• Strong async/concurrency, performance tuning, and low-level instincts
• Solid TCP/UDP/multiplexer and protocol design knowledge (Protobuf, Bincode, raw)
• Security mindset (TLS, cryptography) and calm production-debugging skills
• Architectural judgment — you simplify systems, not just add to them
• 🤖 Fluent with AI dev tools — you use them to move faster and amplify your judgment, not replace it
• Clear English; Asia–Europe time-zone overlap

✅ Big pluses

• SOCKS5 & PROXY protocols
• QUIC/UDP
• RabbitMQ
• gRPC
• Kubernetes/Helm
• MongoDB/Redis Cluster
• E2E test design
• mentoring

🚀 Why join

Genuine ownership, full autonomy, clear path to senior leadership. Low-level systems work with immediate production consequences — billing accuracy, abuse prevention, uptime under real traffic. Most backend jobs never touch this depth — and you'll do it on an AI-first team that ships fast.

🎁 Perks

• 20 days paid leave ·
• 5 sick days
• USD 800/yr office expenses
• quarterly profit-sharing

⏱️ Process

Application → 30-min intro call → take-home challenge → 1–3 founder interviews → offer.

We move fast.

Ready to own a mission-critical system and build the proxy platform developers love?

Apply now and let’s ship something great together.