Senior Database Engineer

20k - 22.5k PLN20 000 - 22 500 PLN/ mies./ mies.

MidZdalnie·WarszawaFull-time

#474666·Dodano 2 dni temu·1

Źródło: XTB

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Tech Stack / Keywords

PostgreSQL MongoDB Linux Ansible Python Bash Prometheus Grafana ZabbixPatroni

Podsumowanie oferty

You will manage, scale, and optimize mission-critical database infrastructure for a company focused on online trading of financial instruments. The role centers on high-availability PostgreSQL clusters and distributed MongoDB sharded environments.

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 distributed MongoDB environments, including sharding, shard balancing, replica set elections, aggregation pipeline tuning, and WiredTiger optimizations.
Proven 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, or Zabbix.
Practical experience with DR and BCP frameworks, automated failovers, and real-world recovery exercises.
Scripting and automation skills with 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 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 tuning OS-level storage I/O parameters.
Design, maintain, and automate backup and recovery strategies, including Point-in-Time Recovery (PITR), for relational and document stores.
Plan and execute Business Continuity Planning (BCP) and Disaster Recovery (DR) drills, failover testing, and data restoration drills.
Administer 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.
Collaborate with development, platform, and security teams on data modeling, schema changes, and compliance.

Benefity

Training budget for courses and conferences.
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.

Dofinansowanie szkoleń

Budżet konferencyjny

Płatny urlop

Opieka zdrowotna

Ubezpieczenie

Inne informacje

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

XTB

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