Database Administrator, DBA
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Job Description
Experienced Database Administrator for 12Go in R&D team managing multi-engine database infrastructure. Ensuring database reliability, performance, and security for online travel platform.
Responsibilities:
- Own MariaDB replication topology;
- Design and execute GTID migration plan across self-hosted and RDS instances;
- Monitor and maintain replica lag across all replicas;
- Define and test failover and switchover runbooks.
- Continuously audit slow query logs across all three engines;
- Tune engine parameters for workload characteristics;
- Set up and own PMM or equivalent observability stack for DB metrics.
- Define and enforce safe schema migration procedures (online DDL, pt-online-schema-change);
- Integrate migration steps into CI/CD pipeline; enforce no-deploy-before-migration policy;
- Maintain migration history and rollback procedures for every schema change.
- Implement and verify backup strategy: logical + physical, with tested restore procedures;
- Maintain point-in-time recovery capability for all critical databases.
- Manage database users, roles, and access policies (principle of least privilege);
- Audit and rotate credentials on schedule; integrate with secrets management;
- Ensure data-at-rest and in-transit encryption is in place and documented.
- Write and maintain runbooks for every database: failover, restore, migration, scaling;
- Conduct internal knowledge transfer sessions with the DevOps team;
- Participate in on-call rotation for database-related incidents.
Requirements:
- MariaDB - 3+ years: replication, GTID, binlog, InnoDB tuning, Mariabackup, Percona Toolkit.
- Replication migration - Has done position → GTID migration in production.
- AWS RDS - Knows RDS limitations vs self-hosted; parameter groups, snapshots.
- Performance tuning - Can read EXPLAIN, identify bad indexes, fix slow queries independently.
- Backup & DR - Designed and tested restore procedures; knows xtrabackup / mariabackup.
- Schema migrations - Used pt-osc or gh-ost; understands locking implications.
- Monitoring - Set up Prometheus + Grafana or PMM for database metrics.
- Linux / Shell - Comfortable with bash, systemd, log analysis.
- Docker - Runs DB in containers for dev / staging; understands volume management.
- Nice to Have:
- ClickHouse - MergeTree, partitions, materialized views, query profiling.
- MongoDB - Replica sets.
- Terraform / IaC - Managing RDS instances via Terraform.
- Python or Go - Automation scripts, custom monitoring exporters.
Benefits:
- Engaging work on a product that enables millions of travelers to book their trips daily;
- Full-time remote working - 5 days week, 8 hours per day;
- Development opportunities (budget for self-paced learning, global training workshops, online English language classes, e-learning platforms);
- Internal growth and internal mobility opportunities;
- Competitive annual leave, sick leave, and public holidays;
- Annual company offsite in Thailand.
- What should I do to dive into 12Go company culture?
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