Senior Big Data Engineer — Real-Time AdTech Risk Platform

Sigma Software; Warszawa; On-site; PLN 180,000 - 280,000; Full time

Job summary

Sigma Software is seeking a Senior Big Data Engineer to join a long-term project in the cybersecurity and AdTech domain, focusing on real-time risk assessment for digital advertising ecosystems.

You will optimize Snowflake usage, identify inefficiencies in data pipelines and SQL queries, and contribute to backend Java-based services in a fast-paced, high-load environment. English proficiency is required, with opportunities to shape platform architecture and cost efficiency.

Qualifications

• At least 5 years of commercial Big Data engineering experience.
• Strong hands-on Snowflake expertise.
• Proficient in Python and Java.
• Advanced SQL knowledge and query optimization experience.
• Solid Computer Science fundamentals.
• Upper-Intermediate or higher English.

Responsibilities

• Optimize Snowflake usage and improve infrastructure cost efficiency.
• Identify inefficiencies in data pipelines and SQL queries.
• Implement performance and cost optimization improvements.
• Enhance and maintain Java-based services.
• Implement and support new platform features.
• Improve existing engineering processes and platform components.
• Develop scalable and reliable solutions for high-load environments.
• Collaborate with distributed engineering teams to deliver stable platform functionality.
• Contribute to architecture improvements and implementation of new components

Skills

Big Data

Python

Java

SQL

Tools

Snowflake

Job description

Sigma Software is seeking a Senior Big Data Engineer to join a long-term project in the cybersecurity and AdTech domain, focusing on real-time risk assessment for digital advertising ecosystems.

You will optimize Snowflake usage, identify inefficiencies in data pipelines and SQL queries, and contribute to backend Java-based services in a fast-paced, high-load environment. English proficiency is required, with opportunities to shape platform architecture and cost efficiency.