Senior PostgreSQL / Data Engineer

Inetum; Warszawa; On-site; PLN 240,000 - 360,000; Full time

Benefits offered by this job

Training funded

Certifications funded

Conference participation

Diversity & inclusion

Job summary

Inetum Polska is seeking an experienced Senior PostgreSQL / Data Engineer to build a high-performance data platform for financial markets. You will work on large-scale PostgreSQL environments, supporting real-time data processing with about 40 million messages daily.

The role focuses on design, development, optimization, and integration with messaging systems like RabbitMQ, ensuring high availability and scalability in a demanding financial setting.

Qualifications

• Strong commercial experience with PostgreSQL.
• Excellent knowledge of PostgreSQL architecture and table partitioning.
• Experience with ETL, large-scale data and Big Data environments.
• Fluent Polish and English.

Responsibilities

• Design, develop and optimize a high-performance data platform.
• Ensure near real-time data updates for downstream teams.
• Collaborate across teams handling multi-currency data and high message volumes.

Skills

PostgreSQL expertise

PostgreSQL architecture

Table partitioning

Indexing & query optimization

Index types (B-tree, Hash, GiST, GIN,)

ETL processes

Big Data / large-scale data

Linux

Performance-critical DB

Polish (Fluent)

English (Fluent)

Python

Kafka / RabbitMQ

CI/CD

Real-time data processing

Finance domain knowledge

Job description

Inetum Polska is part of the global Inetum Group and plays a key role in driving the digital transformation of businesses and public institutions. Operating in cities such as Warsaw, Poznan, Katowice, Lublin, Rzeszow, Lodz the company offers a wide range of IT services. Inetum Polska actively supports employee development by fully funding training, certifications, and participation in technology conferences. Additionally, the company is involved in local social initiatives, such as charitable projects and promoting an active lifestyle. It prides itself on fostering a diverse and inclusive work environment, ensuring equal opportunities for all.

Globally, Inetum operates in 19 countries and employs over 28,000 professionals. The company focuses on four key areas:

• Consulting (Inetum Consulting): Strategic advisory services that help organizations define and implement innovative solutions.
• Infrastructure and Application Management (Inetum Technologies): Designing and managing IT systems tailored to clients’ individual needs.
• Software Implementation (Inetum Solutions): Deploying partner solutions from industry leaders like Microsoft, SAP, Salesforce, and ServiceNow.
• Custom Software Development (Inetum Software): Creating unique software solutions to meet specific client needs.

With strategic partnerships with major technology giants, including Microsoft, SAP, Salesforce, and ServiceNow, Inetum delivers advanced technological solutions tailored to customer requirements. In 2023, Inetum reported revenues of €2.5 billion, underscoring its strong position in the digital services market.

Inetum distinguishes itself by offering a comprehensive range of benefits that meet the diverse needs of employees, providing flexibility, support and commitment. Here's what makes working at Inetum unique:

• A cafeteria system that allows employees to personalize benefits by choosing from a variety of options.
• Generous referral bonuses, offering up to PLN6,000 for referring specialists.
• Additional revenue sharing opportunities for initiating partnerships with new clients.

Professional development and team support:

• Ongoing guidance from a dedicated Team Manager for each employee.
• Tailored technical mentoring from an assigned technical leader, depending on individual expertise and project needs.

Community and Well-Being:

• Dedicated team-building budget for online and on-site team events.
• Opportunities to participate in charitable initiatives and local sports programs.
• A supportive and inclusive work culture with an emphasis on diversity and mutual respect.

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
• 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

Qualifications

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

Additional Information

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: