Senior Database Engineer / PostgreSQL

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People MoreSoftware Development
Kraków, ., Warszawa, ., Poznań, ., Wrocław, ., Gdańsk, ., Kraków, Country code: PLContractSenior
Salary21,840 - 28,560 PLN per hour
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Job Details

Languages
En B2, pl B2
Required Skills
PostgreSQLSQLData modeling

Requirements

  • Strong hands-on knowledge of PostgreSQL.
  • Experience in designing and scaling databases used in real production systems.
  • Very good knowledge of SQL, query plans, indexes, transactions, and locking mechanisms.
  • Ability to independently diagnose and resolve database performance issues.
  • Experience with replication, partitioning, backups, and high availability.
  • Knowledge of multitenancy, data isolation, and row-level security.
  • Ability to work effectively with developers, DevOps engineers, and architects.
  • Very good English and Polish.

Responsibilities

  • Designing PostgreSQL database architecture for large-scale systems.
  • Scaling databases as the number of users, queries, and data volumes grows.
  • Diagnosing and resolving database performance and stability issues.
  • Optimizing SQL queries, indexes, data schemas, and PostgreSQL configuration.
  • Analyzing query plans, transactions, locks, and concurrency issues.
  • Designing replication, partitioning, and high-availability solutions.
  • Supporting the team in data modeling and secure data isolation.
  • Defining database monitoring, alerting, and capacity planning.
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21,840 - 28,560 PLN per hour
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