Senior Java Engineer - Microservices & AI-Driven Apps

Playtika; Warszawa; On-site; PLN 180,000 - 260,000; Full time

Job summary

Playtika, a global leader in mobile games, is seeking a senior Java developer to design, build, and maintain scalable services. You will own multiple domains across the lifecycle, drive reliability, and contribute to a microservice architecture with an AI-first approach.

The role requires strong Java, Spring, Kafka, SQL skills, plus testing and CI/CD proficiency. Collaboration with product teams and on-call readiness are expected.

Qualifications

• 5+ years of professional experience in software development with Java.
• Strong knowledge of Java Core (collections, multithreading, streams API) and Java 8+ features.
• Solid experience with the Spring stack: Spring Boot, Spring Cloud, Spring Data (JPA, JDBC).
• Hands-on experience with messaging systems like Apache Kafka.

Responsibilities

• Design, develop, and maintain robust, scalable services that meet business requirements and align with company standards.
• Take end-to-end ownership of multiple domains, supporting them throughout their lifecycle (design, development, deployment, monitoring, maintenance).
• Investigate, resolve, and prevent production incidents to ensure minimal impact on users.
• Collaborate with product managers, architects, and other developers to translate requirements into technical designs and deliver new features.
• Drive improvements in development processes, code quality, testing practices, and system reliability.
• Write clean, well-documented code and ensure proper test coverage (unit, integration, and functional).
• Actively contribute to the evolution of our microservice architecture while supporting existing systems.
• Be an AI-first developer who actively builds and leverages agents to scale personal and team productivity.

Skills

Java Core

Spring Framework

Kafka

SQL

Testing (JUnit/Mockito)

CI/CD

DevOps knowledge

Tools

Docker

Kubernetes

Job description

Playtika, a global leader in mobile games, is seeking a senior Java developer to design, build, and maintain scalable services. You will own multiple domains across the lifecycle, drive reliability, and contribute to a microservice architecture with an AI-first approach.

The role requires strong Java, Spring, Kafka, SQL skills, plus testing and CI/CD proficiency. Collaboration with product teams and on-call readiness are expected.