Java Developer - Digital Marketing Platform

About the role

A global technology company that helps brands and agencies run programmatic media campaigns is looking for a Java developer. The role focuses on developing and modernizing real-time DSP serving services that process bid requests, deliver ads, integrate with third-party platforms and record measurement events used for reporting and billing. The team builds high-throughput, low-latency systems handling millions of requests per second, with a focus on availability, data correctness, performance tuning and scaling.

Key responsibilities

• Develop critical high-performance, large-scale services for DSP programmatic integrations and platform products
• Work with the Product team to turn business needs and product requirements into technical solutions
• Write clean, efficient, production-ready code focused on high throughput and low latency
• Design, develop, test and improve new and existing platform features
• Help build distributed systems processing billions of transactions per day under strict SLAs
• Improve test coverage, monitoring, automation and system observability
• Follow Agile methodologies in a fast-paced engineering environment

Required profile

• 5+ years of commercial experience in Java backend development, with a focus on scalable backend systems
• Strong knowledge of the JVM ecosystem, including garbage collection, profiling and performance tuning
• Experience with distributed REST APIs, fault tolerance, scalability, consistency and resilience
• Experience with real-time streaming pipelines using Kafka, Kinesis or similar
• Production experience with Docker and Kubernetes
• English at B2 level or higher; readiness to join a PagerDuty rotation (1 week per quarter)
• Ability to explain complex technical trade-offs to technical and non-technical stakeholders

Required skills

• Java, Kafka / Kinesis, Redis, S3, Tomcat
• Docker, Kubernetes, Git and CI/CD pipelines (e.g. GitLab CI/CD)
• Nice to have: prior AdTech experience, Python or Scala

What we offer

• Training and mentorship, internal conferences and meetups
• Health insurance and sports activities
• Flexible work options, including remote and hybrid
• Referral program, work anniversary program and extra vacation days