Database Engineer

Job not on LinkedIn

🔥 1 minute ago

🇵🇱 Poland – Remote

💵 zł20k - zł22.5k / month

⏰ Full Time

🟡 Mid-level

🟠 Senior

🔙 Backend Engineer

👻 Ghost score 0%

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XTB online investing

WebsiteLinkedInAll Job Openings

1001 - 5000 employees

Founded 2004

💳 Fintech

💸 Finance

👥 B2C

💰 $194.1M Post-IPO Secondary - Xtb on 2025-05

Fintech • Finance • B2C

XTB online investing is an international online brokerage and investing platform offering access to equities, ETFs, forex, commodities, indices and leveraged CFD instruments through award‑winning web and mobile apps. The firm provides both commission‑free stock and ETF trading (within limits), CFD trading across thousands of instruments, educational resources, market analysis, interest on uninvested funds, and tax‑wrapped ISA products for UK clients; it is regulated by the UK FCA and advertises FSCS protection and consumer risk disclosures. The platform is consumer‑facing, emphasizes digital security and customer support, and highlights over 20 years of industry experience and multiple million users.

📋 Description

• 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

• 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

• 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

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