Senior Software Engineer

Role Overview

• A greenfield project with the chance to shape its technical direction
• Scalable, lightweight architecture for publishers, advertisers, and retailers
• AI-driven real-time shopping intent matching based on page context
• Cleanroom data integrations for precise attribution and targeting
• Natural language campaign management via our MCP (Model Context Protocol) and AI agents
• Innovative ad formats tailored for commerce and retail media

Requirements

• 5+ years of backend engineering experience (JVM ecosystem)
• Bring demonstrable experience in building distributed systems
• Know your way around testing (unit, integration)
• Comfortable diving into frontend work when necessary
• Own your work end-to-end from design decisions to production
• AWS or other major cloud provider experience
• Daily use of AI coding tools (eg Claude Code, Copilot, Cursor) with critical thinking
• Be able to communicate clearly and work independently
• Fluent in Polish and English
• Kotlin experience (or willingness to learn
• it's our primary language)
• Kafka or similar event streaming platforms
• Big Data processing using Apache Spark

Tech Stack

• Apache
• AWS
• Cloud
• Distributed Systems
• Kafka
• Kotlin
• Spark

Benefits

• We are collaborative, fair, consciously inclusive, and flexible
• We trust, value, and support our people to make the difference
• We believe that diversity of thought and experience provides the platform for innovation and creativity
• We invest in the development of our people to drive our ambitions forward
• We offer a range of benefits (including your choice of tech) and a competitive package
• We offer a great work environment in an internationally successful enterprise in the online services industry