Java Full Stack Developer

RAPSYS TECHNOLOGIES PTE LTD; Singapore; On-site; SGD 70,000 - 110,000; Full time

Job summary

RAPSYS TECHNOLOGIES PTE LTD is seeking an experienced Java Full Stack Developer to join our Technology and Operations team in Singapore. You will design and build responsive user interfaces and robust backend services using Java, JavaScript, and modern frameworks.

You will work on microservices, web components, REST/GraphQL APIs, and data-rich applications in an Agile environment, collaborating with QA and cross-functional teams to deliver high-quality software on tight deadlines.

Qualifications

• Bachelor's degree or higher in Computer Science, Information Technology, or a related field.
• Minimum 3 years of relevant experience in Java full stack development.
• Strong experience with Java development and Java OOP concepts.
• Proficiency with frontend technologies and modern frameworks.
• Experience designing REST and GraphQL APIs.
• Familiarity with microservices and microfrontends is a plus.

Responsibilities

• Design and develop responsive user interfaces using HTML5, CSS3, and JavaScript.
• Develop microservices and REST/GraphQL APIs.
• Build reusable UI components and web components for consumer risk applications.
• Collaborate with QA to develop automation tests for UIs.
• Work within an Agile development team to deliver high-quality software.
• Write maintainable code and documentation, and troubleshoot issues.

Skills

Java development

Java OOP

JavaScript fundamentals

Frontend frameworks

REST

GraphQL

Microservices

Agile development

Education

Degree in Computer Science or Information Technology

Tools

Hibernate

PostgreSQL

Git

Jira

Job description

We are looking for an experienced Java Full Stack Developer to join the Technology and Operations team. The role involves developing and supporting consumer risk applications using modern frontend and backend technologies. The developer will work on microservices, microfrontends, reusable web components, APIs, and high-performance applications in an Agile environment.

Location: Singapore Role: Java Full Stack Developer – Technology and Operations Work Mode: Work from Office

Candidate Eligibility: Singapore Citizens / Singapore PR only

We’re Hiring: Java Full Stack Developer!

What You’ll Do:

• Design and develop responsive user interfaces, web components, and frontend frameworks using HTML5, JavaScript, and CSS3.

• Develop microservice-based APIs using REST, GraphQL, and reactive programming principles where applicable.

• Build highly resilient and high-performance services.

• Develop reusable UI frameworks and web components for consumer risk applications.

• Create interactive and reusable frontend components.

• Work on user experience engineering and frontend development.

• Collaborate with QA teams to develop automation tests for user interfaces.

• Work collaboratively within an Agile development team.

• Write high-quality, maintainable source code and deliver applications within tight deadlines.

• Troubleshoot and resolve frontend and backend issues.

• Develop and maintain technical documentation covering application design and code.

What We’re Looking For:

• Minimum 3 years of relevant working experience.

• Degree in Computer Science, Information Technology, or a related field.

• Strong experience in Java development and Java OOP.

• Experience with Java State Machine.

• Hands-on experience with Hibernate and PostgreSQL.

• Strong understanding of JavaScript fundamentals, including closures and prototypes.

• Experience with JReport.

• Good understanding of functional and object-oriented programming principles.

• Frontend development experience with frameworks/technologies such as Angular, Web Components, Vue, Polymer, or ReactJS.

• Backend development experience with Spring, Spring Boot, NodeJS, and/or Express.

• Experience developing REST and Java web services.

• Experience with GraphQL is an advantage.

• Experience with graph databases such as Neo4j is preferred.

• Experience with TypeScript or other type-safe JavaScript technologies is preferred.

• Experience with Redux for frontend state management.

• Working knowledge of frontend automation testing frameworks.

• Strong frontend development skills in HTML, CSS, and JavaScript.

• Experience with JavaScript libraries such as ExtJS, KnockoutJS, or jQuery is an advantage.

• Experience with Git and SVN source code management tools.

• Experience with binary repository tools such as JFrog Artifactory or Sonatype Nexus.

• Familiarity with Atlassian tools such as Jira, Confluence, and Bitbucket.

• Experience with XML, JSON, WSDL, REST, and Apache CXF.

• Experience with Oracle Database, H2/HSQLDB, SQL, and PL/SQL.

• Ability to construct hierarchical SQL queries.

Good to Have:

• Experience with Drools.

• Experience with Jenkins or other Continuous Integration tools.

• Experience with mobile development using HTML5.

• Experience in Java multithreading.

• Strong understanding of Agile development practices.

• Strong organizational and time-management skills.

• Good communication and collaboration skills with developers, QA teams, project