(Senior) Data Developer (m/f/d)

Join our Global Network Analytics area

This is a role for someone who enjoys working close to data, understands both technical quality and business context, and wants to have a real impact on how data is prepared, validated and used by analytical, reporting and product teams.

As a  Data Developer  you will help transform data into a trusted foundation for decision-making, reporting and automation. You will combine technical engineering skills with business understanding, data quality awareness and a critical approach to AI-supported work

In this role, you will

What you will do

• Build and maintain data solutions in Databricks using PySpark and SQL . You will work on new requirements as well as read, understand and extend existing notebooks and data processes.

• Combine data from different systems and prepare reliable datasets for reports, operational processes and business users.

• Create and maintain Delta tables, views and data models, including daily snapshots and reference or mapping datasets.

• Translate business requirements into data logic in cooperation with analysts, Product Owners and international teams.

• Investigate unexpected results, identify data issues and add practical checks for missing, duplicated or inconsistent data.

• Maintain and improve scheduled Databricks jobs that support recurring business processes.

• Keep code understandable and maintainable, and improve performance where it affects reliability or processing time.

• Curiosity about new technologies and openness to exploring solutions beyond traditional data processing, including automation and containerized applications.

• Document data processes, key business rules and common troubleshooting steps.

What we are looking for

• At least 2 years of experience in Data Engineering, Analytics Engineering or data analysis, including experience in designing ETL/ELT processes and building data models or data layers for analytical purposes.

• Experience in maintaining production data processes, including monitoring, issue diagnosis and data quality assurance.

• Experience with cloud solutions, especially Microsoft Azure .

• Practical knowledge of SQL, Python, PySpark and Databricks .

• Understanding of Data Lake / Delta Lake architecture and data modelling principles.

• Practical experience with Git and Azure DevOps , including managing changes across Dev, Test and Prod environments.

• The ability to translate business requirements into technical solutions.

• Advanced English skills, enabling confident communication in an international environment.

• Analytical and logical thinking, attention to detail, proactivity and the ability to prioritize work under time pressure.

Nice to have

• Experience working in a complex operational environment.

• Knowledge of dimensional modelling, including star schema, fact and dimension tables, data grain, and normalization or denormalization approaches for reporting and analytics.

• Knowledge of advanced Databricks and Delta Lake mechanisms.

• Experience with streaming technologies such as Kafka, Structured Streaming or Event Hubs .

• Familiarity with monitoring and alerting tools.

• Knowledge of data security, access control, metadata management and data lineage principles.

• Experience with Jira and Confluence .

• Certifications such as Microsoft Certified: Fabric Analytics Engineer DP-600 or Databricks Data Engineer / Analyst Associate .

Why join the company?

• Real ownership — your data products will directly influence strategic decisions

• Opportunity to cooperate in a diverse, international, and cross-functional environment alongside leading experts

• Space to experiment with new technologies — including AI tooling — and bring innovations into production

• Your impact will be visible immediately

• We offer B2B type of cooperation

The company has revolutionised e-commerce parcel delivery in Poland and is now one of Europe’s leading out-of-home (OOH) e-commerce enablement platforms. Founded in 1999 by Rafał Brzoska, the company provides delivery services through a network of over 64,000 Automated Parcel Machines (APMs) and more than 30,000 pick-up and drop-off (PUDO) points across nine European countries: Poland, the United Kingdom, France, Italy, Spain, Portugal, Belgium, the Netherlands and Luxembourg, alongside to-door courier and fulfilment services for ecommerce merchants.

The company’s extensive OOH network supports rapidly growing parcel volumes across its markets, with 1.4 billion parcels delivered in 2025. Its locker solutions offer consumers a delivery option that is cheaper, more flexible and convenient, environmentally friendly and contactless. As a leading OOH logistics provider, the company is recognised for transforming parcel delivery economics in Europe, appealing to both consumers and merchants through its flexible, technology-driven solutions.