Data Engineer - Senior

Worldline; Warszawa; On-site; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Private medical & life insurance

Public transportation allowance

Annual bonus

Job summary

Worldline in Poland is seeking a Data Engineer to design, build, and maintain scalable data pipelines and platforms, enabling reliable data for analytical solutions. You will collaborate with developers, analysts, and stakeholders to ensure data is accessible, accurate, and efficiently processed.

You will join a global payments technology leader, working with data from various sources, optimizing workflows, and helping secure data.

Qualifications

• 4+ years of hands-on experience in a Data Engineer/Data Developer role.
• Advanced proficiency in SQL queries and tuning.
• Java programming skills.
• Experience with cloud providers and cloud data warehouses.
• Familiarity with workflow/orchestration tools.
• Fluent English (written and spoken).

Responsibilities

• Build Data Pipelines: Design, implement, and maintain scalable, robust automated data pipelines.
• Manage Data Architecture: Optimize and structure databases, modern data warehouses, and data lakes.
• Integrate Systems: Connect and ingest data from diverse sources including APIs, CRMs, production logs, and databases.
• Performance Tuning: Write complex, optimized SQL queries and continuously monitor database system performance.
• Data Quality & Governance: Establish data validation frameworks and ensure compliance with internal security and data privacy standards.
• Cross-functional Collaboration: Work closely with Data Scientists, Business Analysts, and Backend Software Engineers to deliver clean datasets.

Skills

SQL

Java

Cloud platforms

Workflow management

English communication

Data orchestration

Tools

CI/CD tools

Containerization

Streaming technologies

Job description

Worldline helps businesses of all shapes and sizes to accelerate their growth journey - quickly, simply, and securely. We are the innovators at the heart of the payments technology industry, shaping how the world pays and gets paid. Our technology powers the growth of millions of businesses across 5 continents. And just as we help our customers accelerate their business, we are committed to helping our people accelerate their careers. Together, we shape the evolution.

The opportunity

As a Data Engineer, you will design, build, and maintain scalable data pipelines and data platforms that enable reliable, high-quality data for business users and analytical solutions. You will work closely with developers, analysts, and business stakeholders to ensure data is accessible, accurate, and efficiently processed. The role involves integrating data from multiple sources, optimizing data workflows, and contributing to the continuous improvement of our data architecture and engineering practices. You will also help ensure that our data solutions are secure, resilient, and aligned with the organization's technology standards.

Day-to-day responsibilities

Core Responsibilities

• Build Data Pipelines: Design, implement, and maintain scalable, robust automated data pipelines.
• Manage Data Architecture: Optimize and structure databases, modern data warehouses, and data lakes.
• Integrate Systems: Connect and ingest data from diverse sources including APIs, CRMs, production logs, and databases.
• Performance Tuning: Write complex, optimized SQL queries and continuously monitor database system performance.
• Data Quality & Governance: Establish data validation frameworks and ensure compliance with internal security and data privacy standards.
• Cross-functional Collaboration: Work closely with Data Scientists, Business Analysts, and Backend Software Engineers to deliver clean datasets.

Who are we looking for

Requirements (Must-Have)

• Experience: 4+ years of professional, hands-on experience in a Data Engineering or Data Developer role.
• SQL: Advanced proficiency in writing and tuning complex SQL queries.
• Programming: Solid programming skills in Java
• Cloud & Modern Data Stack: Hands-on experience with cloud providers and cloud warehouses.
• Data Orchestration: Strong familiarity with workflow management tools
• Communication: Fluency in English (written and spoken) to collaborate effectively with a global team.

Nice-to-Have Skills

• Experience with CI/CD tools and containerization.
• Familiarity with streaming technologies.

Other skills

• SQL and Database Management
• Programming and Data Processing
• ETL/ELT and Data Pipeline Development
• Cloud Data Platforms and Big Data Technologies
• Data Modeling and Problem-Solving

At Worldline, you’ll get the chance to be at the heart of the global payments technology industry and shape how the world pays and gets paid. On top of that, you will also:

• Private medical & life insurance
• Public transportation allowance
• Annual bonus

Shape the evolution

We are on an exciting journey towards the next frontiers of payments technology, and we look for big thinkers, people with passion, can-do attitude and a hunger to learn and grow. Here you'll work with ambitious colleagues from around the world, take on unique challenges as a team, and make a real impact on the society. With an empowering culture, strong technology and extensive training opportunities, we help you accelerate your career - wherever you decide to go. Join our global team of 18,000 innovators and shape a tomorrow that is yours to own.

Learn more about life at Worldline at jobs.worldline.com

We are proud to be an Equal Opportunity employer. We do not discriminate based upon race, religion, color, national origin, sex, sexual orientation, gender identity, gender expression, age, status as an individual with a disability, or any applicable legally protected characteristics.