Senior, Middle+ Data Engineer (AdTech)

About Us

Join SIEMA TECH, a cutting-edge software development company where innovation and technology unite to solve real-world problems. We are at the forefront of developing solutions that empower businesses and individuals worldwide. As we continue to expand, we are looking for a talented and driven Data Engineer to join our dynamic team and accelerate the growth of our high-load advertising technology platform.

The Role

As a Data Engineer at SIEMA TECH, you will play a crucial role in managing our massive datasets, designing scalable data pipelines, and implementing advanced solutions to power our real-time analytical capabilities. You will work closely with our software engineering, data analytics, and product management teams to transform raw, high-velocity data into actionable insights that drive our business forward.

What You Will Do

• Design, build, and maintain scalable, high-performance data pipelines (ETL/ELT) to process billions of advertising events.
• Develop real-time streaming architectures and batch processing workflows using modern Big Data tools.
• Optimize data storage, querying performance, and cost management across cloud data warehouses.
• Collaborate with cross-functional teams to integrate multiple data sources, clickstreams, and advertising logs into a unified lakehouse/warehouse environment.
• Ensure data quality, reliability, and security across all data layers.

Requirements (Mandatory)

• 3+ years of experience as a Data Engineer strictly within the AdTech industry (this is a hard requirement).
• Proven track record of building and maintaining large-scale data pipelines (High-Volume & High-Load).
• Advanced Python and SQL skills (query optimization, complex transformations, and scripting).
• Hands-on production experience with Apache Spark (PySpark/Scala) and Apache Kafka.
• Deep experience with at least one major cloud platform (AWS, Azure, or GCP).
• Strong experience working with modern cloud data warehouses such as Snowflake, Google BigQuery, or Amazon Redshift.
• Strong background in processing high-volume event, clickstream, or advertising data.
• English level: upper intermediate and above.

Preferred / Nice to Have

• Deep understanding of programmatic advertising ecosystems: RTB, DSP, SSP, OpenRTB protocols, multi-touch attribution, or campaign performance analytics.
• Familiarity with orchestration and transformation tools like Apache Airflow and dbt.
• Hands-on experience with containerization and orchestration using Docker and Kubernetes.

What We Offer

• Opportunity to work with truly massive datasets (Petabyte-scale) and low-latency infrastructure.
• Competitive compensation package based on your expertise.
• Professional growth inside a high-tech product environment.
• Flexible working hours and options for remote work.
• Assistance (in the absence) in the registration of the IE (legal and accounting support).

The interview consists of 3 stages: introductory interview, technical interview/interview with the client, technical task.

If you are interested in this vacancy and meet the requirements, send your resume and motivation letter to our email. We look forward to welcoming you to our team!