Senior Data Engineer: AdTech Data Infra & BI

MWDN; Warszawa; On-site; PLN 240,000 - 420,000; Full time

Benefits offered by this job

PTO 29 days

Recovery days 10

Independent contractor support

Free English classes

HR support

Flexible working hours

Job summary

MWDN is seeking a Senior Data Engineer to build and scale data infrastructure powering our BI platform. You will work with massive volumes of ad server data, CRM data, and other sources to design, maintain, and enhance pipelines delivering real-time analytics.

The role sits at the intersection of ad‑tech and modern data engineering. You will ingest data from SSPs, DSPs, GAM, and third‑party APIs to produce analytics‑ready datasets and dashboards that enable campaign optimization, workflow

Qualifications

• 5+ years of professional data engineering experience
• 2+ years working with programmatic advertising and ad‑tech data (GAM)
• Strong proficiency in Python and SQL
• Hands‑on experience with data warehouses (BigQuery, Snowflake, Redshift, ClickHouse)
• Experience with batch processing frameworks (Spark, dbt, Airflow)
• Understanding of ad‑tech data structures: bid requests, impressions, OpenRTB schemas, log‑level data
• Experience with cloud platforms (AWS, GCP) and infrastructure‑as‑code
• Ability to work partial US work hours (available until 2pm ET)

Responsibilities

• Design, build, and enhance scalable data pipelines for processing data from a variety of ad server and ancillary data sources
• Ingest and normalize data from multiple SSPs, DSPs, ad servers (GAM), and third‑party reporting APIs
• Develop ETL/ELT workflows to transform raw data into analytics‑ready datasets
• Create data models for campaign performance optimization, supply analysis, supply allocations, and profit maximization
• Build and maintain data warehouses and lakes optimized for ad‑tech query patterns
• Implement data quality monitoring, validation, and anomaly detection for data streams
• Support Executive, BI, and analytics teams with clean, documented, and performant data infrastructure
• Ensure data privacy compliance (GDPR, CCPA) in data collection, storage, and processing

Skills

Data engineering

Python

SQL

Programmatic advertising

GAM

Tools

BigQuery

Snowflake

Redshift

ClickHouse

Spark

dbt

Airflow

Terraform

Kubernetes

Job description

MWDN is seeking a Senior Data Engineer to build and scale data infrastructure powering our BI platform. You will work with massive volumes of ad server data, CRM data, and other sources to design, maintain, and enhance pipelines delivering real-time analytics.

The role sits at the intersection of ad‑tech and modern data engineering. You will ingest data from SSPs, DSPs, GAM, and third‑party APIs to produce analytics‑ready datasets and dashboards that enable campaign optimization, workflow