Java Software Engineer

With over 2600 employees in 28 subsidiaries across the EMEA region, ASBIS is a pre-eminent global value add distributor, OEM, and solutions provider. We are distinguished by our in-depth industry insight and 32+ years of experience as a reliable global partner for clients and suppliers.We are proud of being one of the certified companies by Great Place to Work®, the global authority on workplace culture, as we believe that our true asset is people. ASBIS invests a lot to create a workplace where every employee has consistently positive experience, professional growth, and appropriate support to unlock their potential and build a future with the Company.Whatever your area of expertise and specialization, you will find a range of career opportunities at ASBIS.About the position: We are looking for a highly skilled and experienced Backend Java Developer to join our dynamic team. The ideal candidate will have extensive experience in building scalable client-server applications, with specific knowledge of high-performance networking via Netty (raw sockets) and MQTT for embedded device integration. Proficiency in Spring Boot, REST API design, and Firebase services (FCM/APNS) is required. Experience with State Machine patterns, Sequence Diagrams, and database versioning with Flyway is essential, as the role involves documenting and refactoring complex communication protocols and participating in architectural decisions to drive the continuous improvement of our production environment.Key Responsibilities:Lead the development and maintenance of high-quality backend services using Spring Boot and Java (versions 11 through 21).Implement and manage high-performance networking solutions using Netty to handle raw socket communication with embedded devices.Design and develop scalable messaging logic using MQTT (Mosquitto/RabbitMQ) for seamless interaction between services and nodes.Design and develop RESTful APIs to support mobile application functionality and ensure smooth client-server integration.Utilize State Machine patterns to manage complex device lifecycles and ensure system reliability.Create and maintain technical documentation, including Sequence Diagrams, to describe complex interactions between services and clients.Manage database migrations and persistence using Flyway and MySQL, ensuring data integrity across different service modules.Troubleshoot, debug, and optimize application performance, including analyzing raw logs and monitoring system health via Prometheus and Grafana.Stay current with industry trends, providing expert input on adopting new technologies (e.g., Redis) to enhance the platform’s architecture.Requirements:Proven experience as a Java Backend Developer with a strong portfolio of scalable, production-ready applications.Proficiency in Spring Boot and Java (understanding the nuances between Java 11 and 21).Extensive experience with networking frameworks like Netty and protocols such as TCP/UDP and MQTT.Strong experience in designing and developing RESTful APIs for mobile clients (Android/iOS).In-depth knowledge of database management using MySQL and schema versioning tools (Flyway).Experience with embedded device integration and handling low-level/poorly documented binary protocols.Experience with Firebase services, specifically FCM and APNS, for mobile notification delivery.Familiarity with DevOps tools including Docker, GitLab CI, and HAProxy for load balancing.Excellent problem-solving skills with a proactive approach to refactoring legacy modules and improving system architecture.Working Conditions: Opportunity to work for a financially strong, fast-growing multinational companyConstant interaction with global teams of professionalsInternational career opportunitiesAccess to continuous professional development: training, certification programs, events, and team buildingsCompetitive salary package and motivation schemeLife events’ gifts, corporate presents and awards, years of service bonusesWe are on a mission to bring technology to everyone and are looking for new colleagues. Are you the one? Apply now.By applying for the above position, you will confirm that you have reviewed and agreed to our Privacy Notice https://www.asbis.com/privacy-policy