> Markdown version of [/jobs/ext/413076-senior-database-administrator-remote](https://www.wearedevelopers.com/jobs/ext/413076-senior-database-administrator-remote). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Database Administrator (remote) - **Company:** LINK11 GmbH - **Location:** Frankfurt am Main, Germany (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Databases, Data Centers, Data Integrity, Data Systems, Relational Databases, Shard (Database Architecture), Software Debugging, Linux, Disaster Recovery, Elasticsearch, Failover, PostgreSQL, Online Analytical Processing, Online Transaction Processing, Performance Tuning, Query Optimization, Standard Sql, SQL Databases, System Availability, Database Performance, Indexer, Vertica, Ddos - **Published:** June 24, 2026 - **Apply:** https://de.indeed.com/viewjob?jk=f5c73730a9ba9515 ## About the Role Do you have experience in SQL?, * Solid experience administering relational databases in production, with strong expertise in PostgreSQL (replication, high availability, backup/restore, query tuning). * Hands-on experience with ClickHouse or comparable column-oriented / OLAP databases, including partitioning, MergeTree engines and large-scale ingest. * Experience operating Elasticsearch (cluster sizing, sharding, index lifecycle management, query and indexing performance). * Practical experience running databases in clustered, multi-datacenter setups with replication, failover and data redundancy. * Strong command of SQL and a deep understanding of indexing, query execution plans, partitioning and performance optimization. * Comprehensive experience with Linux operating systems and a good understanding of networking, storage and how they affect database performance. * Solid grasp of backup, disaster recovery and monitoring/observability practices for data systems. * A mindset geared toward sharing knowledge, learning continuously, and contributing to technical discussions. * Ability to work both independently and collaboratively, while communicating requirements, challenges, and progress clearly to technical and non-technical stakeholders. * Excellent communication skills in English or German. ## Description * Operate, scale and safeguard our PostgreSQL, ClickHouse and Elasticsearch clusters, which provide data redundancy across multiple datacenters and form the backbone of our DDoS defense and WAAP platform. * Design and maintain high-availability and replication topologies, plan failover and disaster-recovery strategies, and ensure data integrity and durability even when an entire datacenter goes offline. * Own the full schema lifecycle - review and ship versioned migrations and their matching reverts, enforce our SQL coding guidelines, and keep changes safe to roll out across clusters under heavy load. * Tune performance end to end: query optimization, indexing, partitioning and sharding strategies, and capacity planning for ingest-heavy OLAP workloads (ClickHouse) alongside transactional OLTP workloads (PostgreSQL). * Integrate and Improve monitoring, alerting and backup automation so issues are caught before they reach our customers, and so recovery is fast, tested and reliable. * Work closely with our development and operations teams as the go-to expert on data modeling, storage and retrieval, supporting them in complex debugging and troubleshooting tasks. * Contribute to a performance-critical environment where efficiency, scalability and reliability matter every day., * We live our startup mentality at heart. The professional framework gives us the growth and stability of Link11- founded in 2005. We are still strong today working alongside the founders and the management team. * We are full of energy, have short decision-making paths and bring changes directly on the way. * We live a positive, interactive and appreciative working atmosphere in which all employees can contribute. * We encourage the further development of our employees. * We are willing to leave our comfort zone for innovation and improvement because we want to be the best in the market. * We have received several awards for our forward-looking solutions. ## Related Videos - [Database Magic behind 40 Million operations/s](https://www.wearedevelopers.com/videos/748-database-magic-behind-40-million-operations-s) - [WeAreDevelopers LIVE - Chrome for Sale? 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