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 organizationThe international work environment will give you the opportunity to interact with the English language on a daily basisScandinavian 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'll Have Design, implement, and optimise data pipelines to support end-to-end capital-markets AML detection scenariosImplement detection logic, rule frameworks, and scoring components to support financial-crime use casesEnsure high-quality engineering across code, data pipelines, and operational processesContribute to a greenfield architecture with a strong sense of ownership, innovation, and delivery excellence Expected competences and knowledge Strong programming skills in Python and JavaAdvanced experience with Apache Spark (PySpark), SQL for large-scale distributed data processingHands-on experience in distributed compute platforms and on-premise cluster environmentsProficiency with CI/CD tools such as Bamboo/Jenkins, and BitbucketExperience working in Agile teams, with the ability to work independently in fast-paced, evolving environmentsStrong 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 etcPrevious experience in Financial Crime, AML, or surveillance use casesExperience implementing rule-based detection systems, scorecards, or alerting frameworksExperience delivering against NFRs such as performance, scalability, observability, data quality, resiliency, and securityExperience with automation, including automated pipeline deployment, data validation, testing frameworks, and workflow orchestrationExperience 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 PythonJavaApache Spark (PySpark)SQLBamboo, Jenkins, BitbucketCI/CDAgile 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.