The date the source published, not the day we noticed it
(2026-11-04).
Last seen at its source 1h ago.
We have tracked this listing since 4 Nov 2026 (1 days). The employer's own board has carried it every time we have read it, most recently 1 hour ago.
Is it remote?
Marked remote on the employer's board
Their board carries a remote setting on this
posting — a field they filled in, not wording we read. The location
field names somewhere specific, which is usually where the team or
the entity sits.
Who may apply?
Warsaw
The description states no restriction of its own.
This is the source's own tag.
Pay not stated
Similar roles pay PLN 302.4k–425k/yr
Middle 50% of 24 listings that
do state pay — Engineering · Senior · Poland ·
PLN/year.
This employer has published no salary; this is what
comparable listings we hold disclose, never converted between
currencies or periods.
How this is calculated.
Recognised terms only, from a fixed vocabulary —
this is what CV matching compares against.
Carried by 1 source
Leveremployer's own boardfirst seen 1d ago ·
last seen 1h ago
The listing
XTB is a global company from the financial industry, focusing on online trading of financial instruments. We are the largest FinTech in Poland and a leader in Central and Eastern Europe, and the range of our operations covers several countries, including Asia and South America. At XTB, we focus on the development of our employees, giving them opportunities to gain knowledge and skills in various fields, as well as offering a number of training and development programs. If you are looking for challenges and want to gain valuable experience in an international business environment, XTB is the right place for you.
We are looking for an experienced Database Administrator (DBA) to take ownership of our mission-critical database infrastructure. In this role, you will manage, scale, and optimize high-availability PostgreSQL clusters and distributed MongoDB sharded environments, ensuring data integrity, peak performance, and enterprise-grade resilience.
Responsibilities
Administering, configuring, and maintaining production PostgreSQL clusters, including streaming replication, connection pooling, and high-availability setups.
Managing distributed MongoDB environments: designing and optimizing sharded clusters, replica sets, and query routing (mongos).
Deep performance tuning and capacity planning: identifying bottlenecks, optimizing slow queries, indexing strategies, engine configuration, and OS-level storage I/O parameters.
Designing, maintaining, and automating end-to-end backup and recovery strategies (including Point-in-Time Recovery - PITR) for both relational and document stores.
Planning and executing regular Business Continuity Planning (BCP) and Disaster Recovery (DR) drills, failover testing, and data restoration drills.
Administering databases at the Linux level (Debian/Ubuntu): kernel tuning, memory allocation, storage diagnostics, and system hardening.
Automating database maintenance, monitoring, deployments, and routine DBA tasks using Ansible, Python, and Bash.
Performing occasional on-site visits to data centers in Poland and across Europe for infrastructure rollouts, recovery tests, or deep diagnostic operations.
Collaborating with development, platform, and security teams on data modeling, schema changes, and compliance.
Requirements
4+ years of hands-on experience as a Database Administrator managing enterprise-scale production environments.
In-depth practical knowledge of PostgreSQL: master-replica architectures, failover mechanisms (e.g., Patroni), logical/physical replication, and deep performance diagnostics (EXPLAIN plans, pg_stat_statements).
Hands-on experience with MongoDB in distributed environments: sharding architecture, shard balancing, replica set election mechanics, aggregation pipeline tuning, and wiredTiger engine optimizations.
Proven expertise in enterprise backup & recovery architectures.
Strong Linux systems administration background (performance troubleshooting, storage/IOPS analysis, memory management, networking).
Experience with modern database observability platforms (e.g., Prometheus, Grafana, Zabbix).
Practical experience with DR and BCP frameworks, including automated failovers and real-world recovery exercises.
Solid scripting and automation skills: Bash, Python, Ansible, and Git.
Willingness to participate in paid on-call rotations and occasional travel to data centers.
Polish proficiency sufficient for fluent communication.
Technical English proficiency enabling fluent cross-team communication (min. B2 level).
Nice to have
Previous MS SQL and MySQL experience.
Familiarity with Kubernetes database operators.
Experience with Terraform or Infrastructure-as-Code workflows for DB provisioning.
Knowledge of database security, compliance, and auditing standards (data encryption at rest/in transit, TLS, NIS2, GDPR).