Senior Data Engineer

🕒 August 21

🇵🇱 Poland – Remote

⏰ Full Time

🟠 Senior

🚰 Data Engineer

👻 Ghost score 36%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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MWDN

WebsiteLinkedInAll Job Openings

51 - 200 employees

💼 Consulting

📦 Logistics

🏥 Healthcare

Consulting • Logistics • Healthcare

MWDN is a comprehensive IT services company that specializes in software development, web design, mobile development (iOS and Android), and desktop development. With over 200 in-house software engineers, MWDN provides a range of services including staff augmentation, dedicated teams, and global IT recruitment. Operating globally with delivery centers in Central and Eastern Europe, MWDN effectively bridges businesses in the USA, Europe, and Israel to top-tier tech talent while focusing on cost-effective solutions and personalized services tailored to client needs.

📋 Description

• Architect and build high-performance systems processing millions of ad transactions in real time • Own the full development lifecycle from architecture to deployment • Design and build scalable pipelines for bid stream, impression, and revenue data • Ingest and normalize data from SSPs, DSPs, ad servers, and third-party reporting APIs • Build real-time and batch processing systems for auction analytics, win-rate analysis, and bid landscape modeling • Develop ETL/ELT workflows transforming raw programmatic data into analytics-ready datasets • Create data models for yield optimization, floor-price analysis, and demand-partner performance • Build and maintain data warehouses and lakes optimized for ad-tech query patterns • Implement data quality monitoring, validation, and anomaly detection for programmatic data streams • Support BI and analytics teams with clean, documented, performant data infrastructure • Ensure GDPR and CCPA compliance in data collection, storage, and processing • Collaborate with a modern, high-performing international engineering team

🎯 Requirements

• 5+ years of professional data engineering experience • 2+ years working with programmatic advertising or ad-tech data • Strong proficiency in Python and SQL • Experience with streaming data platforms: Kafka, Kinesis, Pub/Sub • 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 AWS and GCP cloud platforms • Experience with infrastructure-as-code • Familiarity with SSP reporting APIs and log-level data: Magnite, PubMatic, Index Exchange, Xandr • Google Ad Manager reporting, Data Transfer files, and BigQuery exports familiarity • Familiarity with Prebid Analytics adapters and bid stream data • Familiarity with mobile measurement platforms: AppsFlyer, Adjust, Kochava • Familiarity with RTB log files and auction data • Knowledge of revenue metrics: CPM, eCPM, RPM, fill rate, win rate, bid density • Knowledge of auction analytics: bid landscape, floor optimization, timeout analysis • Knowledge of demand partner performance: SSP/bidder scoring, latency analysis • Knowledge of supply chain data: ads.txt validation, sellers.json mapping, SPO analysis

🏖️ Benefits

• Security through carefully vetted clients and reliable, timely payments • Career support and assistance finding new opportunities • Legal assistance with independent contractor or sole proprietorship status, taxes, and related processes • English courses • Professional growth opportunities • Team-building events • Flexible working hours • 29 days of PTO (18 working days per year plus all national holidays) • 10 paid sick days • Full financial and legal support for independent contractors • Free English classes with native speakers or Ukrainian teachers • Dedicated HR support