Callsign is seeking a Software Engineer (Full Stack) to design, build, and maintain end-to-end features spanning our high-throughput Java backend services and modern web interfaces. This on-site role is based in Abu Dhabi, United Arab Emirates, and you will own features from architectural design through implementation, testing, deployment, and operational monitoring in an Agile, collaborative environment with Product managers, UX/UI designers, and QA engineers. Responsibilities include building scalable Java-based backend services with Spring Boot and RESTful APIs, developing responsive front-end interfaces with modern JavaScript/TypeScript frameworks (React preferred; Vue or Angular welcomed), and integrating frontend with backend systems. You will write clean, testable code across the full stack, follow engineering best practices, participate in peer code reviews, contribute to architectural discussions, and help reduce technical debt. You will support deployment pipelines, troubleshoot production issues across frontend and backend layers, and drive continuous improvement. Requirements include 3–6 years of commercial full-stack experience, strong backend expertise in Java and Spring Boot, RESTful API design (gRPC a plus), frontend experience with JavaScript/TypeScript and a modern framework, proficiency with HTML5, CSS3/SCSS, and responsive UI, knowledge of build tools such as Vite, Webpack, npm, or yarn, solid experience with relational databases (MySQL, PostgreSQL, Oracle) and SQL, solid OOP and SOLID principles, testing frameworks (JUnit, Mockito, Jest, React Testing L

Callsign is seeking a Software Engineer (Full Stack) to design, build, and maintain end-to-end features spanning our high-throughput Java backend services and modern web interfaces. This on-site role is based in Abu Dhabi, United Arab Emirates, and you will own features from architectural design through implementation, testing, deployment, and operational monitoring in an Agile, collaborative environment with Product managers, UX/UI designers, and QA engineers. Responsibilities include building scalable Java-based backend services with Spring Boot and RESTful APIs, developing responsive front-end interfaces with modern JavaScript/TypeScript frameworks (React preferred; Vue or Angular welcomed), and integrating frontend with backend systems. You will write clean, testable code across the full stack, follow engineering best practices, participate in peer code reviews, contribute to architectural discussions, and help reduce technical debt. You will support deployment pipelines, troubleshoot production issues across frontend and backend layers, and drive continuous improvement. Requirements include 3–6 years of commercial full-stack experience, strong backend expertise in Java and Spring Boot, RESTful API design (gRPC a plus), frontend experience with JavaScript/TypeScript and a modern framework, proficiency with HTML5, CSS3/SCSS, and responsive UI, knowledge of build tools such as Vite, Webpack, npm, or yarn, solid experience with relational databases (MySQL, PostgreSQL, Oracle) and SQL, solid OOP and SOLID principles, testing frameworks (JUnit, Mockito, Jest, React Testing L