Job
- Level
- Senior
- Job Feld
- IT, Database, Security
- Anstellung
- Vollzeit
- Vertragsart
- Unbefristetes Dienstverhältnis
- Ort
- Frankfurt am Main
- Arbeitsmodell
- Full Remote, Onsite
Job Zusammenfassung
In dieser Rolle betreibst und skalierst du PostgreSQL-, ClickHouse- und Elasticsearch-Cluster, kümmerst dich um Hochverfügbarkeit, Backup-Strategien und Performance-Optimierung für komplexe Datenanalysen und OLTP-Workloads.
Job Technologien
Deine Rolle im Team
- 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.
Unsere Erwartungen an dich
Qualifikationen
- Strong command of SQL and a deep understanding of indexing, query execution plans, partitioning and performance optimization.
- 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.
Erfahrung
- 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.
- Comprehensive experience with Linux operating systems and a good understanding of networking, storage and how they affect database performance.
Unser Angebot
- Become part of a highly motivated team in which we treat each other with respect.
- Meet your colleagues at eye level. We are all equal and without barriers.
- Live and develop your strengths in a friendly atmosphere.
- Organise yourself in a flexible working model, because you are more than just your job.
- Lead us to success with your skills.
- Community is the trump card: team events, sundowners, after work parties bring us together (also internationally).
- Taking care of our team doesn't end at the coffee machine or a filled fruit basket!
- Look forward to interesting benefits such as fitness, JobRad, support for daycare fees and much more. We are cooperation partners of national and international associations and authorities.
Benefits
Gesundheit, Fitness & Fun
Themen mit denen du dich im Job beschäftigst
Job Standorte
Das ist dein Arbeitgeber
LINK11 GmbH
Link11 GmbH ist ein führender Anbieter von IT-Sicherheitslösungen, der sich auf den Schutz von Infrastrukturen und Webanwendungen vor Cyberangriffen spezialisiert hat. Das Unternehmen hat seinen Hauptsitz in Deutschland und bietet weltweit Sicherheitsdienste an.
Description
- Unternehmenstyp
- Etablierte Firma
- Arbeitsmodell
- Full Remote, Onsite
- Branche
- Internet, IT, Telekom
Senior Database Administrator
- Ort
- Frankfurt am Main
- Arbeitsmodell
- Full Remote, Onsite
- Diversität
- Für alle Personen geeignet (m/w/d)
