Database Engineer

20k - 22.5k PLN20 000 - 22 500 PLN/ mies./ mies.UoPUmowa o pracę (brutto)

SeniorZdalnie·WarszawaFull-time·Umowa o pracę

#474615·Dodano dziś·0

Źródło: nofluffjobs.com

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Tech Stack / Keywords

PostgreSQL MongoDB Prometheus Grafana ZabbixBash scriptPython Ansible Git

Podsumowanie oferty

The role focuses on mission-critical database infrastructure for XTB, a company operating in online trading of financial instruments. You will manage and optimize high-availability PostgreSQL clusters and distributed MongoDB environments, ensuring data integrity, performance, and resilience.

Wymagania

4+ years of hands-on experience as a Database Administrator managing enterprise-scale production environments.
In-depth practical knowledge of PostgreSQL, including master-replica architectures, failover mechanisms such as Patroni, logical and physical replication, and performance diagnostics using EXPLAIN plans and pg_stat_statements.
Hands-on experience with MongoDB in distributed environments, including sharding, shard balancing, replica set elections, aggregation pipeline tuning, and WiredTiger optimizations.
Expertise in enterprise backup and 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 recovery exercises.
Scripting and automation skills with Bash, Python, Ansible, and Git.
Polish proficiency sufficient for fluent communication.
Technical English proficiency for fluent cross-team communication (minimum B2).

Nice to have:

Previous MS SQL and MySQL experience.
Familiarity with Kubernetes database operators.
Experience with Terraform or Infrastructure-as-Code workflows for database provisioning.
Knowledge of database security, compliance, and auditing standards, including encryption at rest and in transit, TLS, NIS2, and GDPR.
Relevant certifications, such as PostgreSQL Certified Professional or MongoDB Certified DBA.

Obowiązki

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.
Tune performance and plan capacity by identifying bottlenecks, optimizing queries and indexes, configuring database engines, and adjusting OS-level storage I/O parameters.
Design, maintain, and automate backup and recovery strategies, including Point-in-Time Recovery (PITR), for relational and document databases.
Plan and execute Business Continuity Planning (BCP) and Disaster Recovery (DR) drills, failover tests, and data restoration drills.
Administer databases on Linux (Debian/Ubuntu), including kernel tuning, memory allocation, storage diagnostics, and system hardening.
Automate database maintenance, monitoring, deployments, and routine DBA tasks using Ansible, Python, and Bash.
Visit data centers in Poland and across Europe for infrastructure rollouts, recovery tests, or diagnostic operations.
Collaborate with development, platform, and security teams on data modeling, schema changes, and compliance.

Benefity

Sport subscription.
Training budget and training and development programs.
Private healthcare.
An extra day off on your birthday.
An extra day off for parents.

Karta sportowa

Dofinansowanie szkoleń

Opieka zdrowotna

Płatny urlop

Inne informacje

Participate in paid on-call rotations.
Occasional travel to data centers in Poland and across Europe is required.

XTB

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