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Are you interested in working with cutting-edge technologies and developing high-performance applications capable of handling over 2 million data queries per second? If so, we have the perfect job for you at LoopMe!
We are a team of skilled engineers who develop and maintain real-time bidding platforms for global advertisers. As part of our team, you will work alongside other talented engineers on a daily basis, using technologies such as Java, Postgres, Clickhouse, Kafka, and others to scale performance, optimize cloud infrastructure, and create innovative features for our various product lines.
Join us and be a part of our mission to push the boundaries of what is possible in the advertising industry!
What We Need
We are looking for a Senior Java Backend Engineer to help build out our high-load ad serving system, capable of handling over 2M requests/second with 50ms response time.
What You'll Be Doing
We are a team of skilled engineers who develop and maintain real-time bidding platforms for global advertisers. As part of our team, you will work alongside other talented engineers on a daily basis, using technologies such as Java, Postgres, Clickhouse, Kafka, and others to scale performance, optimize cloud infrastructure, and create innovative features for our various product lines.
Join us and be a part of our mission to push the boundaries of what is possible in the advertising industry!
What We Need
We are looking for a Senior Java Backend Engineer to help build out our high-load ad serving system, capable of handling over 2M requests/second with 50ms response time.
What You'll Be Doing
- Developing features and performance optimisation for our Java ad-serving application
- Hardening system architecture to ensure smooth operation during peak-load time
- Implementing complex targeting algorithms into the core ad-serving flow
- Working hand-in-hand with multiple teams providing services and data used by our solutions
- 5+ years experience in engineering
- Strong knowledge of Java, Spring / Spring Boot
- Practical knowledge of SQL and experience with PostgreSQL (or any other database)
- Good understanding of microservices architecture and best practices around that
- Linux shell, Docker
- Concurrency understanding
- Experience with gRPC, Project Reactor (formerly RxJava)
- Experience with Kubernetes
- Experience with Kafka
- DGS framework / GraphQL
- Flexible working schedule with the hybrid type of work
- Annual performance bonus
- One month of workation (you can work from any part of the world for one month)
- Multikafeteria
Key Skills
Ranked by relevance
java
microservices
postgresql
docker
kafka
cloud
grpc
sql
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- Posted
- Jul 30, 2025
- Type
- Full-time
- Level
- Mid-Senior
- Location
- Cracow
- Company
- LoopMe
Industries
IT Services
IT Consulting
Categories
Engineering
Related Jobs
3 roles aligned with this opportunity
View Job Details
Related
Full Stack Software Engineer (all genders)
2026-05-21
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Engineering
View Job Details
Related
Backend Developer - Host Experience (all genders)
2026-05-28
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View Job Details
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DevOps Engineer (all genders)
2026-05-28
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