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Junior Big Data Engineer (Java

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Junior Big Data Engineer (Java in Others new

  • Allegro
  • Full time
  • Email
  • Toruń, Poland

Responsibilities

  • Develop, test, and maintain production data pipelines, services, and internal tooling with team support.
  • Work with BigQuery, Cloud Composer (Airflow), GCS, Dataflow, and other Google Cloud Platform services.
  • Implement data ingestion, validation, data-quality checks, monitoring, alerts, and operational automation.
  • Process structured, semi-structured, and event data using formats including Avro, Protobuf, Parquet, JSON, and CSV.
  • Participate in code reviews, technical discussions, incident follow-ups, and documentation.
  • Collaborate with engineers, analysts, and product stakeholders to understand data product usage.

Requirements

  • Commercial experience with Python, Java, or Kotlin.
  • Basic ability to write clean, tested code and willingness to learn modern software engineering practices.
  • Solid SQL fundamentals and basic knowledge of data modeling, relational databases, APIs, and common data formats.
  • Interest in cloud platforms, distributed systems, and large-scale data processing.
  • Systematic problem-solving skills, willingness to ask questions, and active learning ability.
  • English proficiency at B2 level or higher.
  • Preferred experience includes projects involving data pipelines, backend services, cloud platforms, or SQL data warehouses.
  • Familiarity with Docker, Git, CI/CD, Linux, or cloud infrastructure fundamentals is beneficial.
  • Exposure to DBT, Airflow, Apache Beam, Spark, Kafka, or streaming systems is beneficial.

Benefits

  • Hybrid 4/1 work model with flexible start times between 7:00 a.m. and 10:00 a.m., plus 30 days of occasional remote work.
  • Employment contract with an annual performance and company-results bonus.
  • Well-located offices with equipped kitchens, bicycle parking, terraces, and ergonomic work equipment.
  • Choice of a 16-inch or 14-inch MacBook Pro or corresponding Dell Windows computer with accessories.
  • Cafeteria benefits including medical, sports, lunch, insurance, and purchase voucher packages.
  • Employer-paid English classes, training budget, hackathons, inter-team tourism, and an internal learning platform.
  • Additional paid day off for volunteering and company social events.

Allegro

Allegro is the most popular shopping platform in Poland and the largest e-commerce platform of European origin. We operate a marketplace model which means that customers can buy whatever they need from over 135,000 merchants, who can list an unlimited number of offers on our platform. We offer p...

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