Junior Big Data Engineer (Java

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Junior Big Data Engineer (Java in Others new

Allegro
Full time
Email

Others
10/18/2026
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Toruń, Poland

Responsibilities

Develop, test, and maintain production data pipelines, services, and internal tooling with team support.
Work with BigQuery, Cloud Composer (Airflow), Google Cloud Storage, Dataflow, and other Google Cloud services.
Implement data ingestion, validation, data-quality checks, monitoring, alerts, and operational automation.
Process structured, semi-structured, and event data using 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 understanding 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 from feedback.
English proficiency at B2 level or higher.
Projects involving data pipelines, backend services, cloud platforms, or SQL data warehouses are welcomed.
Familiarity with Docker, Git, CI/CD, Linux, cloud infrastructure, DBT, Airflow, Apache Beam, Spark, Kafka, or streaming systems is advantageous.

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.
Annual performance and company-results bonus.
Well-located offices with equipped kitchens, bicycle parking, terraces, ergonomic equipment, and interactive conference rooms.
Choice of a 16-inch or 14-inch MacBook Pro or equivalent Dell Windows laptop with accessories.
Cafeteria-plan benefits including medical, sports, lunch, insurance, and voucher packages.
Company-funded English classes related to the role.
Training budget, inter-team tourism, hackathons, and an internal learning platform.
Additional volunteering day off 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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