We are looking to extend our B2C team with a Principal Database Administrator. Based either in our Sofia or in our new Barcelona office, you will be the most senior operational authority over our data infrastructure across our European hubs. This is a role for a highly experienced, hands‑on database professional who has spent years keeping large, high‑throughput, 24/7 production databases alive, healthy, and fast. You will own the stability, performance, and security of our clusters day to day, while driving the operational execution of a major cleanup, upgrade, and cloud migration initiative.
The technology currently in use is MySQL (Percona XtraDB Cluster and MariaDB), running multi‑terabyte, multi‑node clusters serving live players around the clock. You’ll be joining a friendly and open‑minded team with an informal attitude and a high level of cooperation.
What will you be doing?

Production Ownership: Act as the ultimate operational owner of our Percona XtraDB Cluster (Galera)



and MariaDB environments — a ~22TB estate supporting a 24/7 platform where availability and operational resilience are critical. Work closely with the DB specialists of the company currently hosting and administering our bare‑metal servers in Netherlands.
Upgrades & Migrations: Plan and execute complex version upgrades (e.g. Percona XtraDB Cluster 5.7 → 8.4) using rolling, zero‑downtime strategies, with rigorous rollback planning.
Cloud Execution: Drive the hands‑on execution of our data migration to Amazon Web Services (AWS), including continuous replication pipelines, and hybrid on‑prem/cloud topologies.
Data Lifecycle & Cleanup: Design and run large‑scale data trimming, partitioning, and archival — online schema migrations on billion‑row tables without disrupting live traffic.
Performance Tuning: Diagnose deep engine‑level bottlenecks — InnoDB internals, buffer pool behavior, Galera flow control, lock contention, query execution plans, and indexing strategy.
High Availability & DR: Esta

📌 Principal Database Administrator (Barcelona)
🏢 LCKY Group
📍 Barcelona