Backend Developer - Java

7 Months ago • 3 Years +
Backend Development

Job Description

As a Backend Engineer - Java, you will be responsible for designing, building, and enhancing features for our game platform, focusing on our self-build Java game engine that is interfacing with other services written in Java and PHP, which we constantly extend and improve. Your work will align with best practices in stability, performance, scalability, security, and maintainability. You will collaborate closely with game designers, producers, and other stakeholders to implement innovative features that enhance the player experience. You will mainly work on the Java Backend of our existing and upcoming games, designing, developing, testing, deploying, maintaining, and improving software with high-quality, maintainable code.
Good To Have:
  • Be familiar with or eager to learn other languages like PHP, JavaScript, Typescript
  • Experience developing and maintaining high-load backend services and APIs
  • Familiarity with SQL and NoSQL databases, including MySQL, PostgreSQL, MongoDB, or similar
  • Knowledge of unit testing, integration testing, and test automation frameworks
  • Experience with cloud platforms (GCP preferred), CI/CD, and debugging distributed systems
  • Hands-on experience with agile methodologies such as Scrum or Kanban
Must Have:
  • 3+ years of Java development experience with strong coding skills
  • Proficiency in Spring, Spring Boot, JUnit5, and Gradle frameworks
  • Excellent verbal and written communication skills in a cross-functional team

Add these skills to join the top 1% applicants for this job

cross-functional
communication
problem-solving
github
kanban
agile-development
postgresql
mysql
networking
nosql
spring-boot
apache-kafka
gradle
redis
mongodb
ci-cd
docker
sql
github-actions
typescript
php
javascript
multiplayer
java

Join us as Backend Engineer - Java on our existing and upcoming games within our Supremacy franchise!


As a Backend Engineer - Java, you will be responsible for designing, building, and enhancing features for our game platform, focusing on our self-build Java game engine that is interfacing with other services written in Java and PHP, which we constantly extend and improve. Our servers are running on a distributed architecture in the Google Cloud. Your work will align with best practices in stability, performance, scalability, security, and maintainability.
In this role, you will collaborate closely with game designers, producers, and other stakeholders to implement innovative features that enhance the player experience. For this role, you must be fluent in technical and business English; German language skills are a plus.

YOUR MISSION

  • You will mainly work on the Java Backend of our existing and upcoming games. However, you need to be comfortable with working in other languages like PHP as well
  • Design, develop, test, deploy, maintain, and improve our software with high-quality, maintainable code
  • Work closely with game designers and product leads to implement new features with an interest in learning the complementary full-stack technologies
  • Communicate and collaborate within a cross-functional team and with other teams to ensure a smooth daily workflow
  • Actively participate in technical decisions influencing the architecture of our services and platform
  • Drive initiatives to enhance the stability, performance, and scalability of our platform and live games
  • Contribute high-quality, maintainable Java code using a wide range of technologies such as Spring, JUnit5, Gradle, Github, Docker, MySQL, Apache Kafka, Flatbuffers, and Redis

YOUR BACKSTORY
  • 3+ years of proven experience in Java development, demonstrating strong coding and debugging skills

  • Proficiency in popular Java frameworks such as Spring, Spring Boot, JUnit5, and Gradle

  • Excellent verbal and written communication skills, with the ability to work effectively in a cross-functional team environment

  • Be familiar with or eager to learn other languages like PHP, JavaScript, Typescript

  • Excellent analytical and problem-solving skills

  • You have a proactive attitude towards learning new technologies and improving existing skills, including leaving the comfort zone of your programming language

  • You have experience developing and maintaining multi-server, high-load backend services and APIs

  • Familiarity with SQL and NoSQL databases, including MySQL, PostgreSQL, MongoDB, or similar

  • Knowledge of unit testing, integration testing, and test automation frameworks

  • You are enthusiastic about games and ideally strategy games

  • Experience with cloud platforms (GCP preferred), CI/CD (GitHub Actions), networking, and debugging distributed systems is a plus

  • Hands-on experience with agile methodologies such as Scrum or Kanban


Join Twin Harbour Interactive

Where Strategy Meets Vision.

Twin Harbour Interactive is a global strategy game powerhouse, shaping the future of long-term multiplayer gaming. With offices in Hamburg and Malta, we design strategy games that bring people together—across borders and generations.

Whether you’re an expert tactician or an imaginative world-builder, there’s a place here for you to grow, thrive, and leave your mark.

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