Middle Java Back-end Developer (Freelance)

Hurma; Polska; Hybrid; PLN 180,000 - 290,000; Full time

Benefits offered by this job

Flexible hours

Remote work

Paid vacation 20 days/year and 5 sick/

5 sick days/year

Unlimited unpaid time off

Personal development plan

Skills training

Internal/External mentorship programs

Structured processes and transparency

Team-building events

Family-friendly policies with gifts

Job summary

Hurma is seeking an experienced backend developer with commercial GameDev exposure, preferably in slot games, to build and evolve backend services for our gambling products. You will work closely with game teams, QA, and product to deliver new features and system improvements.

The role requires strong Java expertise (Core, Spring, REST, SQL/Hibernate) and hands-on use of AI tools in daily work. Flexible remote work and growth opportunities are offered.

Qualifications

• 3+ years of Java development in gambling/iGaming context.
• Experience with slot games is required.
• Strong math processing skills.
• Hands-on AI tools in daily work.

Responsibilities

• Develop backend services for games and platform features.
• Collaborate with game teams, QA, and product.
• Contribute to feature development and system improvements.
• Ensure robust REST APIs and security practices.

Skills

Java

Core Java

Spring Boot

Spring MVC

Spring Security

REST APIs

SQL

Hibernate

JUnit/Mockito

Gambling/iGaming knowledge

AI tools usage

Docker

Git

Maven/Gradle

JVM basics

Analytical thinking

Communication skills

Problem solving

Education

B.Sc. in Computer Science

Tools

Hibernate

Spring Boot

Docker

Git

Maven/Gradle

Job description

Commercial experience in Gambling / iGaming is required

Commercial GameDev experience is required (preferably slot games)

-3+ years of experience in Java

-Experience in math processing

-Experience with slot games

-Structured and analytical thinking

-Strong elaboration 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

-Spring Boot, Spring MVC (REST APIs), Spring Security (JWT)

-SQL, JPA

-JWT

-Development and support of backend services

-Participation in feature development and system improvements

-Close collaboration with game teams, QA, and product

-JVM basics (heap/stack, GC, memory model)

-SOLID

-Spring MVC (filters, interceptors)

-Spring Security (filters, auth flow)

-Validation (Bean Validation)

-Java concurrency fundamentals (basic understanding)

-Databases & Persistence: Transactions, Indexing basics, Hibernate

-Testing: JUnit 5, Mockito, Integration testing basics

-DevOps & Tooling: Docker (basics, build/run), Git (branching, rebase), Maven / Gradle

• Flexible working hours and the freedom to work remotely;
• Paid vacation of 20 workdays/year and 5 workdays/year for sick leaves;
• Unlimited unpaid day-offs to take care of personal matters;
• A range of paid benefits to choose from;
• Personal development plan to support your growth
• Skills training to sharpen your expertise;
• Education office featuring internal and external experts and mentorship programs;
• Structured processes through our corporate confluence;
• Open-minded management style with transparent communication of company strategy and plans;
• Performance-based reviews to recognize and reward your contributions;
• Stress management initiatives, including 1-1 meetings and a feedback culture;
• Engaging in corporate team-building events, marathons, and online challenges;
• Family-friendly policies, including special congratulatory gifts for personal milestones like the birth of a child or a wedding.

If you are an ambitious and enthusiastic professional, always eager to learn and achieve the best results, Twin Win Games is the place for you! We offer ample opportunities for personal development and professional growth. Join us as we continue to create innovative and exciting gaming experiences.