Java Full Stack Developer

RAPSYS TECHNOLOGIES PTE. LTD.; Singapore; On-site; SGD 90,000 - 140,000; Full time

Job summary

RAPSYS TECHNOLOGIES PTE. LTD. is seeking a skilled software engineer to design responsive UI frameworks and robust backend services in Singapore. The role requires hands-on experience across Java, JavaScript and modern frontend frameworks.

You will collaborate in an Agile environment, write high-quality code, and contribute to API design, UI tests, and system documentation to deliver scalable business applications.

Qualifications

• 3+ years of relevant experience.
• Strong JavaScript fundamentals including closures and prototypes.
• Frontend automation testing experience.

Responsibilities

• Design and develop responsive UI frameworks and reusable web components using HTML5, JavaScript and CSS3.
• Develop microservices and APIs using Java, Spring Boot, REST, GraphQL and Reactive principles.
• Build extensible frontend frameworks and reusable components for business applications.
• Work with QA to develop UI automation tests.
• Troubleshoot and resolve frontend and backend issues.
• Collaborate with IT teams in an Agile environment.
• Develop high-quality code within deadlines and maintain technical documentation.

Job description

Key Responsibilities

• Design and develop responsive UI frameworks and reusable web components using HTML5, JavaScript and CSS3.
• Develop microservices and APIs using Java, Spring Boot, REST, GraphQL and Reactive principles.
• Build extensible frontend frameworks and reusable components for business applications.
• Work with QA to develop UI automation tests.
• Troubleshoot and resolve frontend and backend issues.
• Collaborate with IT teams in an Agile environment.
• Develop high-quality code within deadlines and maintain technical documentation.

Primary Requirements

• Minimum 3 years of relevant experience.
• Experience with Java, Java State Machine, Hibernate and PostgreSQL.
• Strong JavaScript fundamentals including closures and prototypes.
• Frontend experience with Angular, Web Components, Vue, Polymer or ReactJS.
• Backend experience with Spring, Spring Boot, NodeJS or Express.
• Experience with Redux and TypeScript or other type-safe JavaScript.
• Frontend automation testing experience.
• Experience with HTML, CSS, JavaScript and libraries such as ExtJS, KnockoutJS or JQuery.
• Experience with Git/SVN and binary repository tools such as JFrog Artifactory/Nexus.
• Familiarity with JIRA, Confluence and Bitbucket.
• Experience with Java web services, Apache CXF, REST, XML, JSON and WSDL.
• Experience with Oracle/H2/HSQLDB, SQL and PL/SQL, including hierarchical queries.