Cockroach Labs builds CockroachDB — a globally-distributed, strongly-consistent SQL database inspired by Google Spanner. Founded by ex-Googlers (Spencer Kimball, Peter Mattis, Ben Darnell). Series F, late-stage. The interview emphasizes deep distributed-systems work, Raft/Paxos, and the engineering of a scale-out SQL database.
Process
Recruiter screen → 60-minute coding (DSA medium) → onsite virtual: 2 coding, 1 system design, 1 craft deep-dive (often distributed-systems-flavored), 1 behavioral. Cycle: 4–6 weeks.
What they actually ask
- Design a Raft-based replicated key-value store and reason about correctness
- Design a SQL query optimizer/distributor over a sharded keyspace
- Design online schema changes that preserve consistency under load
- Coding: medium DSA, plus careful systems and concurrency reasoning
- Behavioral: ownership, deep technical taste, calm-rigor culture
Levels and comp (2026)
- SE: $185K–$245K total
- Senior SE: $260K–$350K
- Staff: $360K–$490K
- Principal: $500K–$700K+ at top of band
Prep priorities
- Be fluent in Go (the entire database)
- Understand Raft, MVCC, distributed transactions (2PC, Percolator), and Spanner-style time
- Brush up on SQL query optimization, distributed planning, and storage engines (Pebble/RocksDB)
Frequently Asked Questions
Is Cockroach Labs remote-friendly?
Distributed-first since founding. Hubs in NYC, San Francisco, Toronto. Most engineering roles fully remote in supported countries.
How does CockroachDB compare to Spanner, YugabyteDB, or TiDB?
Spanner is GCP-only and the original. Yugabyte is the closest open-source competitor. TiDB is the Chinese open-source option. CockroachDB is OSS+commercial with strong PG compatibility. Comp is mid-to-high tier infra with senior+ bands competitive with FAANG.
What is the engineering culture?
Senior-heavy, technically deep, calm but rigorous. Strong written-first design culture (RFCs, tech notes).