Backend Engineer

Requirements:

• Commercial experience in Gambling / iGaming is required.
• Commercial GameDev experience is required (preferably with slot games).
• 3+ years of experience in Java.
• English — Upper-Intermediate (B2).
• Experience with mathematical processing.
• Experience with slot games.
• Structured and analytical thinking.
• Strong problem-solving and communication skills.
• Hands-on experience with AI tools as part of everyday work is a must.

Strong knowledge of:

• Core Java, Collections, Streams, Lambdas.
• Exception handling, Immutability, Records.
• Clean Code principles.
• Spring Boot, Spring MVC (REST APIs), Spring Security (JWT).
• SQL, JPA.
• JWT.

Responsibilities:

• Development and maintenance of backend services.
• Participation in feature development and system improvements.
• Close collaboration with game development teams, QA, and Product.

Nice to Have:

• JVM: Basics (heap/stack, Garbage Collection, memory model).
• Software Design: SOLID principles.
• Spring: Spring MVC (filters, interceptors), Spring Security (filters, authentication flow), Dependency Injection & IoC, Bean Validation.
• API Design: REST principles, versioning, error handling.
• Concurrency: Basic understanding of Java concurrency fundamentals.
• Databases & Persistence: Transactions, indexing basics, Hibernate.
• Security: Secure coding practices, SQL injection prevention, OAuth2.
• Testing: JUnit 5, Mockito, basic integration testing.
• DevOps & Tooling: Docker (basics, build/run), Git (branching, rebase), Maven / Gradle.

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