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Java Backend Engineer - P0436

Kraków, Lesser Poland Voivodeship, Poland | Marketing and Advertising | Contract

Description


We’re looking for a Java Backend Engineer to join LoopMe — a global AI-powered ad tech company redefining how brands connect with consumers across the open internet.

In this role, you’ll help build and scale our Data Management Platform (DMP) — a massively distributed, high-throughput system processing billions of events daily, creating rich device and audience profiles, and exporting data segments to 50+ global partners and exchanges in real time.

You’ll work on complex backend challenges around performance, scalability, data pipelines, and real-time processing, helping power the infrastructure behind large-scale advertising auctions and audience targeting.

This is an opportunity to work on truly high-load systems, collaborate with experienced engineers, and have direct impact on a product used by some of the biggest players in the ad tech ecosystem.

What you'll be doing:

  • Developing features and optimizing performance for large-scale data pipelines (Spark jobs, HBase, Kafka)
  • Designing and optimizing data schemas for relational and NoSQL databases
  • Building microservice applications

Core qualifications:

  • 2+ years of engineering experience
  • Proficiency in Java with a strong understanding of concurrency and distributed systems
  • Experience with Spring Framework or similar IoC frameworks
  • Experience with JPA or other ORM frameworks
  • Strong knowledge of SQL and experience with modern RDBMS (PostgreSQL)
  • Self-motivated, reliable, and comfortable working across a large multi-module codebase

Additional experience we’d value:

  • Experience with Apache Spark or other large-scale data processing frameworks
  • Experience with HBase or other NoSQL/columnar stores
  • Experience with Kubernetes
  • Experience with Kafka
  • Experience with AI/LLM integrations in backend services

Benefits

  • Flexible working schedule with a hybrid type of work
  • Annual performance bonus
  • One month of workation (you can work from any part of the world for one month)
  • Multikafeteria

To all recruitment agencies: LoopMe does not accept agency resumes. Please do not forward resumes to our jobs career page, LoopMe employees or any other company location. LoopMe is not responsible for any fees related to unsolicited resumes.

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