Database Engineer

This is a fully remote position, open to applicants in Poland.

📋 Description

• Oversee, configure, and sustain production PostgreSQL clusters, encompassing streaming replication, connection pooling, and high-availability configurations.

• Manage distributed MongoDB ecosystems, including sharded clusters, replica sets, and query routing via mongos.

• Conduct performance tuning and capacity planning, which entails identifying bottlenecks, optimizing slow queries, indexing, engine configuration, and OS-level storage I/O tuning.

• Develop, maintain, and automate backup and recovery strategies, incorporating Point-in-Time Recovery (PITR).

• Strategize and implement Business Continuity Planning and Disaster Recovery drills, failover testing, and data restoration activities.

• Administer Debian/Ubuntu databases at the Linux level, focusing on kernel tuning, memory allocation, storage diagnostics, and system hardening.

• Automate database maintenance, monitoring, deployments, and routine DBA tasks utilizing Ansible, Python, and Bash.

• Engage in a structured on-call rotation to guarantee 24/7 availability and prompt incident response.

• Occasionally visit data centers in Poland and throughout Europe for infrastructure rollouts, recovery testing, or diagnostics.

• Collaborate with development, platform, and security teams regarding data modeling, schema modifications, and compliance.

⛳️ Requirements

• A minimum of 4 years of practical experience as a Database Administrator managing enterprise-level production environments.

• Comprehensive practical knowledge of PostgreSQL, including master-replica architectures, failover mechanisms (e.g., Patroni), logical/physical replication, and advanced performance diagnostics (EXPLAIN plans, pg_stat_statements).

• Direct experience with MongoDB in distributed settings, covering sharding architecture, shard balancing, replica set election mechanics, aggregation pipeline tuning, and WiredTiger engine optimizations.

• Demonstrated expertise in enterprise backup and recovery architectures.

• Strong background in Linux systems administration, including performance troubleshooting, storage/IOPS analysis, memory management, and networking.

• Familiarity with database observability platforms such as Prometheus, Grafana, and Zabbix.

• Practical experience with DR and BCP frameworks, including automated failovers and real-world recovery scenarios.

• Solid scripting and automation capabilities: Bash, Python, Ansible, and Git.

• Willingness to participate in compensated on-call rotations and occasional travel to data centers.

• Proficiency in Polish sufficient for fluent communication.

• Proficient in technical English, facilitating fluent cross-team communication, with a minimum B2 level.

🏝️ Benefits

• Significant influence on one of the key transformation projects within the company.

• Involvement in the implementation of SAP from the ground up in a growing international fintech organization.

• Long-term ownership of the SAP environment following the implementation phase.

• Work alongside an experienced team eager to share their knowledge.

• Clear development path supported by regular feedback.

• Training budget allocated for courses and conferences of your interest.

• An additional day off on your birthday.

• An extra day off for parents.

• Equipment tailored to your preferences.

• Private medical care and group insurance.

• Access to an e-learning platform for English learning and a benefits platform.

• Access to a wellbeing platform.

• Flexible remote work options, either from the office in Warsaw or from a coworking space in your location.

• Compensated on-call rotations.