Senior Big Data Engineer for Real-Time AdTech Risk

Sigma Software; Województwo mazowieckie; On-site; PLN 200,000 - 280,000; Full time

Job summary

Sigma Software in Poland is seeking a Senior Big Data Engineer to join a long-term project in cybersecurity and AdTech, 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 while shaping platform architecture for high-load environments.

The role offers collaboration with distributed teams, opportunities to influence technical decisions,

Qualifications

• At least 5 years of commercial experience in Big Data engineering.
• Strong hands-on experience with Snowflake.
• Expertise in Python and Java development.
• Advanced SQL and performance tuning skills.
• Solid Computer Science fundamentals.

Responsibilities

• Optimize Snowflake usage and reduce infra costs.
• Identify inefficiencies in data pipelines and SQL queries.
• Implement performance and cost optimization improvements.
• Enhance and maintain Java-based services.
• Develop scalable solutions for high-load environments.
• Collaborate with distributed teams to deliver platform features.
• Contribute to architecture improvements and new components.
• Support adoption of new platform features.

Skills

Big Data

Snowflake

Python

Java

SQL

English

CS fundamentals

Tools

Snowflake

AWS

Job description

Sigma Software in Poland is seeking a Senior Big Data Engineer to join a long-term project in cybersecurity and AdTech, 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 while shaping platform architecture for high-load environments.

The role offers collaboration with distributed teams, opportunities to influence technical decisions,