Senior Full‑Stack Engineer

Who We Are PAJ is a leading manufacturer, distributor, and consultant in GPS tracking technology, based in Windeck-Hurst. We offer the perfect GPS tracker for almost any application. We are a dynamic, growing company with many creative and passionate minds, both in Germany and abroad. We thrive on open communication and exceptional personalities. If you enjoy variety and challenges, you'll feel right at home with us! What makes us special Dynamic & flat hierarchies : Short paths, quick decisions. Familial atmosphere : A warm, supportive team. Active participation : Your voice matters – actively shape our solutions. Varied tasks : Exciting everyday work with growing opportunities Stay healthy & happy : A sports subscription is included, and you'll also get a day off on your birthday . Support for further education : Outstanding performance is rewarded. Flexible working : 100% remote work – or work from anywhere in the world! The Job :

• Backend Development (Java / Quarkus) : Design, implement, and optimize backend services using Java and Quarkus (including Netty and data protocols where applicable), with a focus on performance, reliability, and clean architecture.
• Frontend Development (Vue.js / Vite) : Build and maintain the web frontend using Vue.js and Vite with JavaScript / TypeScript , ensuring a solid user experience and clean integration with backend APIs.
• Database Administration : Deploy, monitor, and maintain scalable database clusters, including MySQL , MongoDB , Cassandra / ScyllaDB , and Redis , ensuring high availability and performance.
• Streamline Data Flow : Manage and enhance data streaming and messaging systems with Kafka and RabbitMQ for reliable and efficient communication.
• Infrastructure Oversight : Administer Linux servers, ensuring their security, reliability, and smooth operation, while implementing and maintaining cutting-edge open-source solutions. The Individual :
• Technical Expertise : Strong backend experience with Java and Quarkus ; solid frontend experience with Vue.js and Vite using JavaScript / TypeScript ; comfortable integrating systems via APIs.
• Database Specialist : Strong experience with MySQL and familiarity with MongoDB , Cassandra / ScyllaDB , and Redis , ideally including deploying and maintaining database clusters.
• Infrastructure Savvy : Hands-on Linux administration skills and the ability to implement open-source tools effectively in a DevOps environment.
• Problem Solver : Adept at identifying and resolving system anomalies, with a proactive approach to ensuring system stability and reliability.
• Team Player : You have a self-sufficient way of working and are always ready to support your team with your expertise. Type of contract : PermanentEmployment Contract Type of position : Full-time Language : Proficient English (Required), German (nice to have) Work location : Remote or Windeck, Hurst 51570 Germany