Database Engineer

XTB online investing

. Administer, configure, and maintain production PostgreSQL clusters, including streaming replication, connection pooling, and high-availability setups .

Posted 11/4/2026full-timeRemote • PolandMid-LevelSenior💰 PLN 20,000 - PLN 22,500 per monthWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in administering and optimizing PostgreSQL and MongoDB databases in enterprise environments, with strong skills in automation, backup and recovery strategies, and Linux systems administration. Proficient in scripting and monitoring tools to ensure high availability and performance.

Highest-signal resume keywords

PostgreSQL AdministrationMongoDB ManagementLinux Systems AdministrationBackup And Recovery StrategiesScripting And Automation

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

PostgreSQLMongoDBPerformance TuningDisaster RecoveryBackup StrategiesAnsiblePythonBashDebianUbuntu

Soft Skills

CollaborationIncident ResponseCommunication

Tools & Technologies

PrometheusGrafanaZabbix

Industry Keywords

High-AvailabilityStreaming ReplicationSharded ClustersCapacity PlanningBusiness Continuity PlanningData RestorationOn-Call RotationPerformance DiagnosticsPoint-in-Time RecoveryData Modeling

Tech Stack

Tools & technologies

AnsibleGrafanaLinuxMongoDBPostgresPrometheusPython

About the role

Key responsibilities & impact

Administer, configure, and maintain production PostgreSQL clusters, including streaming replication, connection pooling, and high-availability setups
Manage distributed MongoDB environments, including sharded clusters, replica sets, and query routing with mongos
Perform performance tuning and capacity planning, including bottleneck identification, slow-query optimization, indexing, engine configuration, and OS-level storage I/O tuning
Design, maintain, and automate backup and recovery strategies, including Point-in-Time Recovery (PITR)
Plan and execute Business Continuity Planning and Disaster Recovery drills, failover testing, and data restoration exercises
Administer Debian/Ubuntu databases at the Linux level, including kernel tuning, memory allocation, storage diagnostics, and system hardening
Automate database maintenance, monitoring, deployments, and routine DBA tasks using Ansible, Python, and Bash
Participate in a structured on-call rotation to ensure 24/7 availability and rapid incident response
Make occasional on-site visits to data centers in Poland and across Europe for infrastructure rollouts, recovery tests, or diagnostics
Collaborate with development, platform, and security teams on data modeling, schema changes, and compliance

Requirements

What you’ll need

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, including performance troubleshooting, storage/IOPS analysis, memory management, and networking
Experience with database observability platforms such as Prometheus, Grafana, and 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, minimum B2 level

Benefits

Comp & perks

Real influence on one of the key transformation projects in the company
Participation in the implementation of SAP from scratch in a growing, international fintech organization
Long-term ownership of the SAP environment after the implementation phase
Work in an experienced team that is happy to share its knowledge
A clear vision of development thanks to regular feedback
A training budget for courses and conferences that interest you
An extra day off on your birthday
An extra day off for parents
Equipment tailored to your needs
Private medical care and group insurance
Access to an e-learning platform for learning English and a benefits platform
Access to a wellbeing platform
Remote work, from the office in Warsaw or from a coworking space in your city
Paid on-call rotations