Senior Java Developer Backend (m/w/d)

Join us as Senior Java Backend Engineer on our existing and upcoming games!

At Twin Harbour Interactive we strive to develop high-quality strategy games and make them accessible for all players around the world. In our eyes game development is a promise for fun and entertainment - that’s what we live and aim for!
As a Senior Java Backend Engineer , 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. In this role, you will collaborate closely with game designers, producers, and other stakeholders to
technical and business English; German language skills are a plus.
You will lead and 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 or Javascript/Typescript as well
Take Ownership for maintaining and extending the Java Backend and actively drive firefighting and quality initiatives
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
Mentor and support other engineers through code reviews, pair programming, and knowledge-sharing sessions
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
7+ 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
• Be familiar with or eager to learn other languages like PHP, NodeJs (JavaScript, Typescript)
• Familiarity with SQL and NoSQL databases, including MySQL, PostgreSQL, MongoDB, or similar
• Deep understanding of computer science fundamentals such as object-oriented design, algorithms, and software architecture patterns
• You are enthusiastic about games and ideally strategy games
• Hands-on experience with agile methodologies such as Scrum or Kanban

A Global Team, A Shared Purpose
With over 30 nationalities represented across our two locations, we’re united by a shared passion for strategy games and a bold vision for the future. Whether you're crafting code from a harbor-view desk in Hamburg or fine-tuning design details under the Maltese sun, we support flexible hybrid work models that empower you to do your best work – wherever you are.
We invest in your growth with language courses, e-learning platforms, and support for conferences and training.
From game nights to casual drinks, quiz nights, and karaoke, we don’t just work together – we connect, play, and support each other like a true crew.

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.