Java Backend Engineer (early mid)

14 000 - 16 800 PLNNet per month - B2B

Java Backend Engineer (early mid)

Java

Wadowicka 3a, Kraków

Loopme

14 000 - 16 800 PLN
Net per month - B2B
Full-time
B2B
Mid
Hybrid

Tech stack

    Apache Kafka

    master

    Java

    master

    Postgres

    advanced

    SQL

    advanced

    ClickHouse

    advanced

Job description

Do you want to work with patented AI technology and develop high-performance solutions? If so, we have the perfect job for you at LoopMe!


We are a global team of skilled engineers who develop and maintain real-time bidding platforms for leading advertisers worldwide. Leveraging technologies such as Java, Postgres, Clickhouse, and Kafka, you will be instrumental in scaling performance, optimizing cloud infrastructure, and creating innovative features across our product portfolio. 


As the market leader in AI, LoopMe uses agile methodology to deliver product features at a fast pace. Join us and be a part of our mission to push the boundaries of what is possible in the advertising industry!


Join us and be a part of our mission to push the boundaries of what is possible in the advertising industry!

We are looking for a Java Backend Engineer to help build out our high-load ad-serving system, capable of handling over 2M requests/second under a 50ms response time.


What you'll be doing:

  • Developing features and optimize performance for a high-load Java ad-serving application

  • Implementing data processing streams and gather statistical data

  • Preparing data for other departments and automate report generation


You'll have:

  • 3+ years of engineering experience

  • Understanding of microservice architecture

  • Proficient in Java with a strong understanding of concurrency.

  • Strong knowledge of SQL and experience with modern RDBMS

  • Experience with Kafka


Nice-to-have:

  • Experience with Kubernetes

  • Experience with columnar DB (Clickhouse, Vertica, etc)

  • Be a self-motivated, reliable and flexible team player


Benefits:

  • Competitive compensation package

  • Flexible working schedule and the hybrid type of work

  • Annual performance bonus (up to 8%)

  • One month of workation (you can work from any part of the world for one month)

  • Training budget



Published: 28.08.2025

Meet the company

Loopme

LoopMe is a technology company that uses AI to improve brand advertising performance & outcomes.

Company profile
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