Senior Python&Java Developer with Apache Spark NEW

Jit; Polska; Hybrid; PLN 185,000 - 240,000; Full time

Benefits offered by this job

Flexible work organization

International work environment

Scandinavian culture

Integration meetings

Job summary

Jit Team in Poland is seeking a Senior Python and Java Developer with Apache Spark to join a hybrid team operating from Gdynia, Gdańsk or Warszawa. You will design data pipelines, implement AML detection components, and work on a greenfield platform for financial crime prevention in capital markets.

The role demands PySpark, SQL, and CI/CD experience, plus an ability to work in cross-functional, fast-paced environments with strong ownership and delivery focus.

Qualifications

• Strong programming skills in Python and Java.
• Advanced experience with Apache Spark (PySpark) and SQL for large-scale data processing.
• Hands-on experience with distributed compute platforms and on-premise clusters.
• Proficiency with CI/CD tools such as Bamboo/Jenkins, and Bitbucket.
• Experience in Agile teams and working independently in fast-paced environments.
• Strong analytical and problem-solving skills.

Responsibilities

• Design, implement, and optimise data pipelines to support AML detection in capital markets.
• Implement detection logic, rule frameworks, and scoring components for financial-crime use cases.
• Ensure high-quality engineering across code, data pipelines, and processes.
• Contribute to a greenfield architecture with ownership and delivery excellence.

Skills

Python

Java

SQL

Agile

Analytical thinking

Problem solving

Education

Bachelor's degree in Computer Science

Tools

Apache Spark

PySpark

Bamboo

Jenkins

Bitbucket

Job description

Senior Python&Java Developer with Apache Spark

Salary: 1000-1300 PLN/day on B2B

Work model: hybrid from Gdynia / Gdańsk / Warszawa (3 days per week from the office)

Why choose this offer?

• You can expect a flexible work organization
• The international work environment will give you the opportunity to interact with the English language on a daily basis
• Scandinavian organizational culture will provide you with work-life balance, you will gain time for additional training (financed by Jit)
• The Jit community will bring you a nice time during regular integration meetings

Project

You will be involved in a financial crime prevention initiative within Capital Markets, focused on building and enhancing transaction monitoring and AML detection solutions. The project includes developing large-scale data processing pipelines, implementing detection rules and scoring models, and contributing to a greenfield platform designed to identify suspicious trading and financial activities across products such as FX, Equities, Derivatives, and Bonds.

Responsibilities you'will have

• Design, implement, and optimise data pipelines to support end-to-end capital-markets AML detection scenarios
• Implement detection logic, rule frameworks, and scoring components to support financial-crime use cases
• Ensure high-quality engineering across code, data pipelines, and operational processes
• Contribute to a greenfield architecture with a strong sense of ownership, innovation, and delivery excellence

Expected competences and knowledge

• Strong programming skills in Python and Java
• Advanced experience with Apache Spark (PySpark), SQL for large-scale distributed data processing
• Hands-on experience in distributed compute platforms and on-premise cluster environments
• Proficiency with CI/CD tools such as Bamboo/Jenkins, and Bitbucket
• Experience working in Agile teams, with the ability to work independently in fast-paced, evolving environments
• Strong analytical and problem-solving skills with the ability to adapt quickly

Nice to have

• Understanding of Capital Markets products including FX, Equities, Derivatives, and Bonds etc
• Previous experience in Financial Crime, AML, or surveillance use cases
• Experience implementing rule-based detection systems, scorecards, or alerting frameworks
• Experience delivering against NFRs such as performance, scalability, observability, data quality, resiliency, and security
• Experience with automation, including automated pipeline deployment, data validation, testing frameworks, and workflow orchestration
• Experience in integrating the solutions with the third party systems (like case management systems)
• A strong “can-do” attitude and the ability to collaborate effectively in a cross-functional team

Technologies you'll work with

• Python
• Java
• Apache Spark (PySpark)
• SQL
• Bamboo, Jenkins, Bitbucket
• CI/CD
• Agile

Client – why choose this particular client from the Jit portfolio?

Jit Team has had an over-decade-long relationship with the leading financial group in the Nordic countries, and we are privileged to be our client's premier partner in Poland. At present, over 200 Jit personnel are engaged in the completion of more than 60 projects for this Norwegian major provider of financial services with a global presence and a strong focus on modern technology. Our customer's work atmosphere is epitomized by the Scandinavian culture, which is conducive to people who place emphasis on work-life balance and feedback culture. Furthermore, all projects are executed in international teams, giving constant exposure to the English language.

About Jit Team

The Human Factor of IT - it’s not just a slogan, it’s a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 770 experienced experts, to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams.

Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.