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Offer summary
(Summary generated by AI based on the full job description)
The project focuses on modernizing a data processing platform for the banking sector. Technologies used include Scala, Apache Spark and Java, with work involving SQL and Big Data environments. Responsibilities cover designing, developing and maintaining scalable data pipelines and ETL/ELT for large data volumes. Duties include optimizing Spark performance, integrating data sources, collaborating with data and business teams, and ensuring code quality and CI.
from: 24 September 2026
to: 24 October 2026
salary not specifiedB2B contract
Offer parameters
level:mid
working mode:hybrid • full office
Warszawa, Mokotów
Requirements
Expected technologies
Scala
Apache Spark
Java
SQL
Optional technologies
Apache Airflow
Python
Our requirements
- Minimum 4 years of experience as a Data Engineer working on projects involving large-scale data processing
- Strong knowledge of Scala and Apache Spark
- Practical experience with Java and developing backend applications or data processing solutions
- Experience designing and implementing ETL/ELT processes and data pipelines
- Good knowledge of SQL and relational databases
- Experience working with distributed systems and Big Data environments
- Advanced knowledge of both Polish and English, and residency in Poland
Your responsibilities
- Designing, developing, and maintaining scalable data pipelines using Scala and Apache Spark
- Implementing ETL/ELT processes and transformations for large volumes of data
- Developing and maintaining data processing components using Java
- Optimizing the performance of Spark applications and data processing workflows
- Integrating data from various sources and preparing it for further analysis and use by banking systems
- Collaborating with Data Engineers, Developers, Analysts, and business teams to design and deliver data solutions
- Monitoring code quality and conducting continuous integration
About the project
We are looking for a skilled Data Engineer to join our team in Warsaw, working on a project focused on modernizing the backend data processing platform for an investment bank. This role involves collaborating with feature teams to enhance data processing capabilities using Big Data technology on an internal cloud. You will be part of a modern, data-driven environment, with a hybrid work model that includes 2-3 days in the office each week. If you are passionate about backend development and data engineering, this opportunity may be the right fit for you.
What we offer
- Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
- Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
- We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
- Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
- Comfortable workplace – class A offices or remote work
- Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
- PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
- Investment in your growth – meetups, webinars, training platform and technology blog – you choose
- Fantastic atmosphere created by all Sii Power People
Recruitment stages
- 1.Send your CV
- 2.Talk to us about your expectations
- 3.Learn more about our projects and choose the best
- 4.Start your adventure with Sii!
Sii Sp. z o.o.
Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment.
Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.
This is how we work
Data Engineer - Java & Scala (f/m/x)
I apply to:
Sii Sp. z o.o.
Warszawa, Mokotów
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