Senior Java Developer

GR8 Tech is a leading B2B provider of iGaming solutions that empowers operators to grow, lead, and win. We deliver high-impact, full-cycle tech solutions designed to scale. From seamless integration and expert consulting to long-term operational support, our platform powers millions of active players and drives real business growth. It's more than just a product — it's the iGaming Platform for Champions, built for those who play to lead. We know the game and how to take it to the next level. With 1000 talented professionals on board, we don't just build tech — we build success stories for iGaming operators all over the world. Our ambition drives us, our people make it real. Join us and be part of building champion-level success What You'll Be Driving: Design and implement scalable and efficient software architectures; Write, test, and debug complex code for new and existing software applications; Provide guidance and mentorship to junior engineers and team members; Conduct thorough code reviews to ensure code quality, security, and best practices; Create and maintain comprehensive technical documentation for software development and system design; Lead and manage software development projects, ensuring timely delivery and quality(shared responsibility with Delivery Manager); Work closely with cross-functional teams, including product management, design, and operations, to align development efforts with business goals; Research and implement new technologies and methodologies to improve software performance and development processes; Identify and resolve complex software issues and technical challenges; Develop and enforce testing protocols to ensure software reliability and performance; Drive continuous improvement in software development practices and processes; Communicate effectively with stakeholders, including presenting technical concepts and project updates; Deliver code to production in timely manner according to business expectations What Makes You a GR8 Fit: Advanced knowledge of Java Programming Proficiency in core Java concepts such as OOP (Object-Oriented Programming), multithreading, collections, exception handling, and memory management; In-depth understanding of Java 8 features, including Streams API, lambda expressions, Optional, and the new Date and Time API; Mastery of Java concurrency and synchronization, thread pooling, and concurrent data structures; Experience with JVM internals, including garbage collection, performance tuning, and profiling. Java Frameworks and Libraries Extensive experience with Spring Framework (Spring Boot, Spring MVC, Spring Data, Spring Security); Proficiency in Hibernate or JPA for ORM (Object-Relational Mapping) and data access; Familiarity with other Java-based frameworks like Apache Camel, Vert.x, or Micronaut; Knowledge of build tools like Maven and Gradle for project management and dependency management. Web Development Proficiency in building RESTful APIs and web services using frameworks like Spring Boot or JAX-RS; Understanding of web technologies such as HTML, CSS, JavaScript, and front-end frameworks (e.g., Angular, React, or Vue.js); Experience with asynchronous programming and handling real-time data using WebSockets. Testing and Quality Assurance Expertise in unit testing with JUnit, TestNG, and integration testing frameworks; Knowledge of mocking frameworks such as Mockito or PowerMock; Familiarity with behavior-driven development (BDD) tools like Cucumber or JBehave; Experience with performance testing tools like JMeter or Gatling. Database and Persistence Advanced skills in SQL and experience with relational databases (e.g., PostgreSQL, MySQL, Oracle); Proficiency in working with NoSQL databases (e.g., MongoDB, Cassandra, Redis); Experience with database migration tools like Flyway or Liquibase. DevOps and Continuous Integration Experience with CI/CD tools specific to Java projects, such as Jenkins, GitLab CI, or Travis CI; Proficiency in using Docker for containerization and Kubernetes for orchestration of Java applications; Knowledge of infrastructure as code (IaC) tools like Terraform or Ansible for provisioning and managing infrastructure. Performance and Scalability Skills in profiling and monitoring Java applications using tools like VisualVM, JProfiler, or YourKit; Experience in optimizing application performance, including memory management, CPU usage, and response time; Understanding of load balancing, caching strategies (e.g., EHCache, Hazelcast), and distributed systems. Security Knowledge of secure coding practices and understanding of common security vulnerabilities (e.g., OWASP Top Ten); Experience with authentication and authorization mechanisms, including OAuth2, JWT, and SAML; Proficiency in implementing security features within the Spring Security framework. Advanced Networking Understanding of network programming using Java NIO and async I/O; Experience with messaging systems like Apache Kafka, RabbitMQ, or ActiveMQ. Additional Tools and Technologies Familiarity with version control systems like Git and collaboration platforms like GitHub or Bitbucket; Knowledge of code quality and static analysis tools such as SonarQube, PMD, or Checkstyle; Experience with logging frameworks like SLF4J, Logback, or Log4j. Why You'll Love Working Here: Benefits Cafeteria An annual fixed budget that you can use based on your needs and lifestyle. You decide how to allocate it: Sports – gym, yoga, or any activity to keep you active; Medical – insurance and wellness services; Mental health– therapy or coaching support; Home office – ergonomic furniture, gadgets, and tools; Languages – courses to improve or learn new skills. Work-life Parental support with paid maternity/paternity leave and monthly childcare allowance; 20 vacation days, unlimited sick leave, and emergency time off; Remote-first setup with full tech support and coworking compensation; Regular team events – online, offline, and offsite; Learning culture with internal courses, career development programs, and real growth opportunities. Our Culture & Core Values GR8 Tech culture is how we win. Behind every bold idea and breakthrough is a foundation of trust, ownership, and a growth mindset. We move fast, stay curious, and always keep it real, with open feedback, room to experiment, and a team that's got your back. FUELLED BY TRUST: we're open, honest, and have each other's backs; OWN YOUR GAME : we take initiative and own what we do; ACCELER8: we move fast, focus smart, and keep it simple; CHALLENGE ACCEPTED: we grow through challenges and stay curious; BULLETPROOF: we're resilient, ready, and always have a plan. To keep things efficient, please apply only for roles that closely match your experience.