Big Data Developer

Salary:
PLN/ day on B2B

Work model:
elastic hybrid from Gdynia / Gdańsk / Warszawa / Łódź (at least 2 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 project focused on
building and optimizing large-scale data processing pipelines for analytical and regulatory reporting
. The main goal of the initiative is to
consolidate, transform, and analyze financial and transactional data
to support decision-making, compliance, and risk management. The project leverages support decision-making, compliance, a
Big Data technologies
to ensure high data quality, scalability, and performance across complex data ecosystems.

Responsibilities You'll Have

• Design, develop, and maintain data processing pipelines using Hadoop and Spark ecosystems
• Implement and optimize ETL (Extract, Transform, Load) processes for large volumes of financial data
• Collaborate with analysts, data scientists, and other developers to deliver high-quality, production-ready data solutions
• Ensure data integrity, accuracy, and security across distributed data systems
• Participate in code reviews, contribute to continuous integration and deployment (CI/CD), and maintain development best practices
• Support and troubleshoot Big Data applications running in a multi-cluster environment (e.g., YARN, EMR)
• Work in an Agile (SAFe) team environment, participating in sprints, planning, and retrospectives
• Contribute to the continuous improvement of development processes and data platform architecture

Expected competences and knowledge

• Strong programming experience in Java (8+) and/or Scala
• Proven hands-on experience with Apache Spark for batch and distributed data processing
• Solid understanding of Hadoop ecosystem components (YARN, Sqoop, Hive, Oozie, Impala, MapReduce)
• Experience with Linux Shell scripting and automation
• Proficiency in SQL and working with large, complex datasets
• Knowledge of version control and CI/CD tools (Git, Jenkins, Bamboo, Ansible, etc.)
• Good understanding of data modeling, performance tuning, and data lifecycle management
• Strong problem-solving skills, ownership mindset, and ability to work in a collaborative team environment

Nice To Have

• Familiarity with Flink, Kafka, and streaming data pipelines
• Experience with SAFe Agile methodology and data analysis techniques

Technologies
you'll work with

• Hadoop (YARN, EMR, Sqoop, Hive, Oozie, Impala, MapReduce)
• Java
• Spark
• SQL

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 700 experienced experts
. We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme.

Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what
we have achieved over 15 years of activity
. By supporting indigenous initiatives, we ensure the circulation of good energy.