Senior Database Engineer / PostgreSQL

Hello,

We are called People More because we treat our employees with respect, but also because the projects we work on are for people and should be easy and pleasant to use. We are technological, but we look at the bigger picture :)

The company is made up of people with a huge client base in the country and abroad, for whom we build projects from scratch (UX, UI, frontend, backend, mobile) or in part. We work directly for our clients and also support our partners in their own solutions. This ensures a wide range of projects and the ability to change! We work with clients all over the world.

For the project that we are working on with our partner, we are looking for Senior Database Engineer / PostgreSQL.

Your duties will include:

• 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.

Requirements that must be met:

• 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

Nice to have:

• Experience with high-traffic or transaction-heavy systems.
• Knowledge of cloud environments, preferably GCP.
• Experience with database monitoring and observability.
• Knowledge of distributed systems and event-driven architecture.
• Familiarity with AI or agentic coding tools would be an advantage, but is not a key requirement.

Responsibilities

140 - 200 zł/h