Senior Distributed Systems Engineer
Cloudflare · In-Office
About this role
**Senior Distributed Systems Engineer — Data Localization (Cloudflare)** **About Cloudflare** Cloudflare’s mission is to help build a better Internet. We operate one of the world’s largest networks that protects and accelerates Internet applications—without adding hardware, installing software, or changing a line of code. Our intelligent global network routes traffic for millions of websites and other Internet properties, improving performance while reducing spam and other attacks. **Role Summary** Join the **Data Localization** team to build infrastructure that enforces **where customer data is stored, processed, and decrypted** across Cloudflare’s globally distributed edge network. This role focuses on building distributed systems with **provable geographic boundaries** that hold under failure at the scale and reliability Cloudflare customers depend on. **What You’ll Do** - Design, build, and operate backend services that enforce regional boundaries for customer data across the edge network. - Deliver end-to-end features: write technical designs/RFCs, implement services and libraries, add tests and observability, drive rollouts, and own production operations. - Partner with engineers across adjacent platforms (cryptography, networking, data, product) to integrate residency guarantees without regressing performance or reliability. - Reason carefully about failure modes, consistency, and blast radius—design systems that **fail closed for compliance** while degrading gracefully for availability. - Participate in on-call, lead incident response and post-mortems, and continually invest in reliability, capacity planning, and cost. - Raise the engineering bar through code review, mentorship, and clear written communication. **Tech & Stack (examples)** Work across the full stack in **Go** and **Rust**, including edge policy enforcement and cryptographic key routing, plus customer-facing APIs/dashboards on top of: **edge fleet**, globally distributed **key-value storage**, **Workers & Durable Objects**, **PostgreSQL**, **Kubernetes**, and **regional ClickHouse**. **Role Requirements (Must-Have)** - **5+ years** designing, building, and operating production distributed systems at scale. - Strong proficiency in **Go, Rust, or C/C++** (and willingness to work in others as needed). - Solid distributed systems fundamentals, including: - Consistency/consensus models (conceptual Paxos/Raft) - Replication, sharding, partitioning tradeoffs - Failure modes (partial failure, partitions, split brain, clock skew) - Idempotency, retries, backpressure, timeouts, circuit breakers, rate limiting - Health checking, failure detection, leader election, graceful degradation - Observability (metrics/logs/tracing) as design inputs - Practical experience with **API design** (REST/gRPC), **relational databases**, and **async messaging/event streaming** with clear transactional/consistency boundaries. - Comfort with **AI-assisted development tooling**, using it to accelerate work while remaining accountable for correctness, security, and design quality. - Track record of production ownership (on-call, incident response, post-mortems, reliability/performance improvements). - Strong written and verbal communication; ability to write clear design docs and collaborate across time zones. **Nice-to-Have** - Experience building compliance-driven, security-sensitive, or multi-region systems. - Familiarity with cryptography basics (envelope encryption, key man
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