Database Reliability Engineer (DBRE) - Mercari | メルカリ | InterviewCat Jobs

業務内容

Operate production databases (TiDB, MySQL, PostgreSQL, and managed cloud DBs) under a 99.99% availability SLA, including on-call rotation.
Lead end-to-end epics from design through rollout, monitoring, and post-launch tuning.
Design and execute migrations (engine changes, version upgrades, on-prem to cloud) with zero or minimal downtime.
Build and operate CDC and streaming pipelines (Debezium, TiCDC, Kafka) feeding analytics and downstream services.
Write Infrastructure-as-Code (Terraform, Ansible) and automation in Go or Python to reduce toil and scale operations.
Build/maintain database monitoring, alerting, and SLO/SLI dashboards (Datadog, Grafana).
Diagnose/resolve production incidents; drive post-mortems and permanent fixes.
Perform performance tuning (queries, schema, indexing, replication topology) and capacity planning.
Partner with product/platform teams on schema changes and new database adoption.
Contribute to expanding the team into multi-engine DBRE (AlloyDB, CloudSQL, Spanner) and operational models.

Production DBA/DBRE experience with MySQL, TiDB, PostgreSQL, or equivalent RDBMS
Experience operating databases at scale (>10K QPS or >1TB datasets) under production SLA
Hands-on with cloud managed DB services (GCP/AWS): CloudSQL, AlloyDB, RDS/Aurora, etc.
Infrastructure-as-Code (Terraform, Ansible) and scripting (Go, Python, or shell)
Database monitoring/observability (Datadog, Grafana)
Incident ownership, on-call rotations, and performance tuning
Ability to lead epics end-to-end and willingness to learn new engines

Distributed DB internals (sharding, replication, consensus) or production TiDB/Spanner/Vitess/CockroachDB
CDC/streaming pipelines (Debezium, TiCDC, Kafka Connect)
Kubernetes operational experience
Experience leading major database migrations (engine, version, data center)
Cross-team coordination for schema changes and platform adoption