Senior PostgreSQL / Data Engineer

Inetum2; Polska; On-site; PLN 220,000 - 360,000; Full time

Job summary

Inetum Polska sp. z o.o. is seeking a Senior PostgreSQL / Data Engineer to help build a high-performance data platform for financial markets. You will work on near real-time processing, large-scale storage, and integration with RabbitMQ, delivering refreshed data every second.

The role requires strong PostgreSQL skills, partitioning expertise, and experience with Big Data environments in a Linux setting. English and Polish fluency is expected.

Qualifications

• Extensive professional PostgreSQL experience in enterprise-scale systems.
• Deep knowledge of PostgreSQL architecture and partitioning.
• Experience with indexing and query optimization (BTrees, Hash, GIN, GiST, BRIN).
• Experience with ETL processes and Big Data environments.
• Linux proficiency and performance-critical DB tuning.
• Fluent Polish and English.

Responsibilities

• Design, develop, and optimize a high-performance data platform for financial markets.
• Handle near real-time processing and large-scale data volumes.
• Implement partitioning, indexing, and performance tuning.
• Integrate with messaging systems such as RabbitMQ (and Kafka).
• Provide refreshed data access to downstream teams with low latency updates.
• Ensure high availability, scalability and performance in a demanding environment.
• Collaborate with cross-functional teams to deliver robust data solutions.

Skills

PostgreSQL

Partitioning

Indexing & optimization

Big Data

ETL

Linux

Real-time processing

Polish language

English language

RabbitMQ/Kafka

Python

Airflow

CI/CD

Tools

RabbitMQ

Kafka

Apache Airflow

Job description

We are looking for an experienced Senior PostgreSQL / Data Engineer to join a team building a high-performance, enterprise-grade data platform for the financial markets / FX domain.

This is a great opportunity for someone who enjoys working with large-scale data, complex PostgreSQL environments and near real-time processing.

The platform handles approximately 40 million messages every day and provides up-to-date market data with refresh intervals as short as one second.

About the project

You will contribute to the design, development and optimization of a data platform responsible for:

• Processing data for 46 currency pairs
• Handling approximately 40 million messages per day
• Processing data in near real-time
• Managing large-scale data storage with 2-year retention
• Integrating the platform with messaging systems such as RabbitMQ
• Providing downstream teams with access to frequently refreshed data, with updates available every 1 second
• Ensuring high availability, scalability and performance
• Designing solutions capable of supporting large data volumes in a demanding financial environment

Must-have

• Strong commercial experience with PostgreSQL
• Very good understanding of PostgreSQL architecture
• Hands-on experience with table partitioning
• Strong knowledge of database indexing and query optimization
• Experience with B-Tree, Hash, GIN, GiST and/or BRIN indexes
• Experience building or maintaining ETL processes
• Experience working with large-scale / Big Data environments
• Good knowledge of Linux
• Experience working with performance-critical database environments
• Fluent Polish and English

Nice to have

• Python
• Kafka or RabbitMQ
• Apache Airflow
• CI/CD
• Experience in the banking, financial services or FX domain
• Experience with real-time or near real-time data processing

We hereby inform you that Inetum Polska sp. z o.o. has implemented an internal reporting (whistleblowing) procedure. The content of the procedure and the possibility to submit an internal report are available at: https://inetum.whispli.com/speakup?locale=pl