Senior Database Administrator

You will support mission-critical Linux-based platforms within enterprise infrastructure, providing hands-on database administration and production support for systems such as IBM Sterling File Gateway, IBM Connect:Direct and BMC Control-M in a high-availability environment with on-call responsibilities and regular maintenance activities We offer Hybrid work in one of our client's office (Kraków) 6 office days per month. Working in a highly experienced and dedicated team. Benefit package tailored to your needs (medical, sport, lunch subsidy, life insurance, etc.). Online training and certifications. Access to e-learning platform. Social events. Daily tasks: - Install configure and maintain Oracle PostgreSQL and MS SQL databases - Perform database patching upgrades and lifecycle management - Execute backup restore and recovery validation procedures - Troubleshoot and tune database performance issues - Manage database capacity planning and optimization - Analyze and resolve production incidents related to databases - Contribute to root cause analysis for incidents - Perform log analysis on database and Linux levels - Stabilize systems after releases and changes - Participate in major incident bridges - Collaborate with Linux and application teams - Troubleshoot interactions between database application and OS layers - Validate database health and availability - Execute production changes during maintenance windows including weekends - Perform pre and post change validations - Provide risk assessment input for database changes - Participate in on call rota and out of hours support Requirements: 5+ years of experience as DBA in production environments Strong knowledge of Linux RHEL Hands on experience with Oracle PostgreSQL and MS SQL Experience supporting mission critical systems Strong troubleshooting skills under pressure Experience with backup and recovery Experience with replication and high availability solutions Experience in performance tuning Experience with log analysis Openness to work hybrid from our client office 6 days a month Nice to have: Shell scripting or basic automation skills Experience with IBM Sterling File Gateway Experience with IBM Connect Direct Experience with BMC Control-M Experience in financial services or regulated environments Experience supporting batch or file transfer platforms Must have: Oracle, PostgreSQL, MS SQL, Linux Nice to have: Control-M, IBM