Senior Big Data Engineer (AdTech Cybersecurity)

Sigma Software

Województwo mazowieckie

On-site

PLN 200,000 - 280,000

Full time

14 days+

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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

Are you passionate about building scalable Big Data solutions and optimizing high-load platforms? We are looking for a Senior Big Data Engineer to join a long-term project in the cybersecurity and AdTech domain focused on real-time risk assessment for digital advertising ecosystems.
We at Sigma Software offer the opportunity to work on impactful products, collaborate with experienced engineering teams, and contribute to solutions operating on large-scale datasets in a fast-paced environment. You will have the freedom to influence technical decisions and drive meaningful improvements across the platform.

CUSTOMER

Our Customer operates in the cybersecurity domain and develops solutions aimed at protecting organizations and digital ecosystems from online risks and vulnerabilities. The company focuses on building advanced technologies that improve security, reliability, and operational resilience across various industries.

PROJECT

The project is a real-time risk assessment platform for digital advertising ecosystems. The solution helps customers identify potentially low-quality or fraudulent traffic and automatically make decisions before allocating advertising budgets. The platform processes large-scale data streams and requires continuous improvements in performance, scalability, and cost efficiency.

At the initial stage, the role will focus on Snowflake optimization and identifying inefficiencies in data pipelines and SQL queries. In the long term, the engineer will contribute to backend development, platform architecture improvements, and implementation of scalable Java-based services.

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
Contribute to architecture improvements and implementation of new components
Collaborate with distributed engineering teams to deliver stable platform functionality