Senior Data Engineer

Salary: 1200 - 1450 PLN/day on B2B

Work model: hybrid from Gdańsk / Warsaw / Łódź (2/3 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

We are looking for a GenAI/LLM-oriented engineer to join the team building and operating the Data Packaging Framework within the Availability Layer, transforming source data into canonical messages for end-to-end delivery and provisioning of Data Products across domains.

A key part of the role is to embed AI into the engineering lifecycle - enhancing automation and quality gates around schema evolution, validation, publishing and end-to-end testing, including AI-driven review steps already present in the canonical-message pipeline approach. 

Responsibilities you'll have

• Develop and maintain data packaging pipelines transforming source-specific data into canonical message formats aligned with DRA 3 / Availability Layer patterns
  
• Build and evolve LLM/agent-assisted workflows that improve developer productivity and reliability in data pipeline delivery (e.g., PR automation, quality gates, assistive tooling)
  
• Implement and enhance AI-supported schema review and governance gates as part of canonical message lifecycle automation 
  
• Drive AI-supported test automation, including automated E2E test generation and quality validation approaches 
• Build and manage SQL-based transformation logic and configuration-driven pipelines
• Support the canonical message schema lifecycle: validation, versioning, compatibility checks, and publishing workflows
  
• Contribute to framework releases, operational stability, documentation, and Architecture Decision Records (ADRs)

Expected competences and knowledge

• Strong AI / GenAI capability
• Hands-on experience building LLM-powered automation for engineering workflows (e.g., review gates, quality checks, assistant tooling for dev/test/docs)
• Experience with AI-assisted review/approval flows and integrating AI steps into CI/CD-style pipelines
• Experience with AI-assisted test generation / test automation concepts
• Strong engineering discipline around quality and safety for AI outputs (evaluation mindset, reproducibility, traceability).
  Core data engineering
• Strong experience in data engineering and distributed processing; practical delivery mindset.
• Hands-on experience with Kafka and SQL-based transformations
• Experience with batch/stream processing frameworks (e.g., Flink or Spark)
• Familiarity with schema formats and lifecycle (e.g., JSON/Avro/XSD) and versioning/compatibility concepts.
• Experience working with Git workflows and Kubernetes environments
  CI/CD and build pipeline experience (Bazel + Tekton)

Nice-to-have knowledge and experience

• Experience with Data Reference Architecture / data product model
• Knowledge of Airflow, Snowflake, Iceberg, or similar data platforms
• Exposure to data governance, metadata, and lineage concepts
• Experience in banking or other regulated environments

Technologies you'll work with

• GenAI
• Kafka
• SQL
• Flink / Spark

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.