Cloudflare
Senior
Own the metadata layer behind every R2 storage operation at global scale
Build and operate the distributed-SQL-backed metadata system that serves every put, get, list, and delete for Cloudflare's R2 object storage. This is a senior IC role on Cloudflare's Emerging Technologies & Incubation team, going deep on schema design, S3 API compatibility, and Workers/Kubernetes production operations for a system managing billions of objects.
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What this interview tests
- Distributed SQL schema/data model design for a metadata layer
- S3 API compatibility and correctness at billions-of-objects scale
- Production operations on Cloudflare Workers and Kubernetes
- Oncall, incident response, and postmortem writing
- Consistency vs. performance tradeoffs in distributed databases
- AI-augmented daily engineering workflow
Common question themes
Design a metadata schema for an object-storage system serving S3-compatible operations at scale
Tradeoffs between consistency, durability, and performance when choosing an index or query pattern
Tell me about a production incident you owned end-to-end, including the postmortem
How you'd coordinate a cross-cutting schema change across teams (storage infra, networking, platform)
How you use AI tools in day-to-day development and debugging
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