Senior ClickHouse Engineer

Job Description

About Moralis Moralis is redefining how businesses access blockchain data. Our APIs, streaming tools, and multi-chain integrations help developers and enterprises build Web3 applications faster, cheaper, and at scale. We’re a lean, global team with a big mission: to become the go-to data layer for the decentralized internet. Role Overview We’re looking for a dedicated and experienced ClickHouse DBA to take full ownership of our analytical database infrastructure. As more of our product shifts to ClickHouse, we need a specialist who can keep our clusters fast, reliable, and cost-efficient. You’ll partner closely with our backend and infra teams, enabling them to move faster while ensuring the database remains rock solid. What You’ll Do Cluster Operations Manage and scale ClickHouse clusters (replication, sharding, distributed tables). Handle schema evolution, partitioning strategies, and TTLs. Maintain data consistency across replicas and shards. Plan and execute upgrades with zero or minimal downtime. Performance & Optimization Profile and optimize heavy queries and table engines. Tune key configs (max_threads, max_memory_usage, merge settings, I/O schedulers). Benchmark cluster performance (ingest throughput, query latency, merge rate). Work with engineers to optimize schema and query patterns. Monitoring & Reliability Maintain observability stack: Prometheus, Grafana, and system logs. Set up alerting on query performance, merges, replicas, and disk usage. Own backup and restore processes (S3, NFS, or local snapshots). Test and document disaster recovery scenarios. What We’re Looking For 2+ years hands-on ClickHouse experience and 4+ years working as a DBA with distributed or analytical databases. Strong understanding of replication, partitioning, and distributed table design. Experience with performance tuning and large-scale OLAP workloads. Familiarity with observability stacks (Prometheus/Grafana). Hands-on experience managing production clusters with high uptime requirements. Comfortable taking full ownership of mission-critical systems. Nice-to-Have Experience with multi-cluster or cross-region setups. Familiarity with ClickHouse Cloud or Altinity.Cloud. Experience using S3/object storage as part of a ClickHouse deployment. Background in Druid, Pinot, BigQuery, Snowflake, or similar OLAP systems. Contributions to ClickHouse open source. Who You Are Deeply detail-oriented and passionate about performance and reliability. Comfortable working remotely and asynchronously in a fast-paced environment. Proactive about improving infrastructure, automation, and data quality. Excited to work in the Web3/data space and learn new technologies. What We Offer Compensation: Competitive part-time engagement with flexible hours and the ability to convert to full-time as the role evolves. Ownership: You’ll own our ClickHouse infrastructure end-to-end. Culture: Remote-first, async-friendly, and product-led team distributed across Europe and beyond.