Total 20 java developer job vacancies in Hong Kong

Key Responsibilities

• Code, modify, test, correct and document new and existing programs using assigned languages, tools and coding conventions;
• Code, modify, test, correct and document new and existing JCLs;
• Analyse the program specification to produce all testing condition and produce test data based on identified test conditions;
• Prepare JCL to load DB2 table or define VSAM files with the extracted test data for performing the various tests, eg stress test, regression test, performance test etc. When tested successfully, repeat the process for creating production DB2 & VSAM files;
• Prepare and maintain program and system documentation;
• Assist in establishing file structures and processing logic requirements;
• Produce deliverables according to group standards and procedures;
• Assist Project Leaders in the study and design of application systems and work coordination, project management and user training work;
• Troubleshooting and supporting end-users in the implementation and maintenance of application systems;
• Train other contract programmers in the relevant skills; Participate in Disaster Recovery activities eg simulation exercises at Disaster Recovery site;

Qualifications:

• Diploma/Degree In Information Technology
• Have at least three (3) years' post graduate programming experience on IBM mainframe z/OS and CICS operating environment using TSO, ISPF, COBOL for z/OS, CICS COBOL, JCL and other utilities.
• Have at least three (3) years' post graduate hands-on programming experience using COBOL for z/OS and CICS COBOL in processing IBM VSAM and sequential files and able to maintain VSAM file structure.
• Have at least three (3) years' post graduate working experience in preparing JCL for compilation, linkage and execution of COBOL for z/OS programs, Sort and other IBM Utilities. The 3 years’ working experience must be within the past 3 years timeframe;
• Have at least three (3) years' post graduate hands-on programming experience using DB2/SQL in COBOL for z/OS and CICS COBOL programs.

Company Overview

WSH Experts Pte Ltd, based in Singapore, delivers integrated industry services with innovative solutions. Our experienced team combines global expertise and local knowledge to support organizations with tailored, effective strategies.

Job Summary

Develop, test, document, and maintain application programs using Java and related technologies. Support system design, user training, troubleshooting, and disaster recovery activities to ensure reliable system development and maintenance.

Responsibilities

• Code, modify, test, and document new and existing programs using assigned languages and tools following coding conventions to ensure quality deliverables
• Prepare and document test data to validate program functionality and accuracy
• Set up and maintain testing and production environments to support application deployment
• Develop and update program and system documentation to facilitate maintenance and user understanding
• Assist in defining file structures and processing logic requirements to support application functionality
• Produce deliverables that comply with group standards and procedures to maintain consistency and quality
• Support Project Leaders by contributing to application system study, design, work coordination, project management, and user training to enhance project outcomes
• Troubleshoot and resolve end-user issues during application implementation and maintenance to ensure system reliability
• Train contract programmers on relevant programming skills to build team capability
• Participate in Disaster Recovery activities, including simulation exercises at recovery sites, to ensure business continuity
• Acquire new programming skills related to system development and maintenance as assigned by supervisors to stay current with technology
• Perform any other tasks related to system development and maintenance as assigned by supervisors to support team objectives

Required competencies and certifications

• Experience coding with Java, JSP, Servlet, Java Bean, JavaScript, session management, JDBC, and SQL for at least 3 years within the past 4 years
• Experience coding with HTML5, XHTML, AJAX, Web Services (REST API), JSON, Java Server Faces, and EJ for at least 2 years within the past 3 years

Job Responsibilities:

• Code, modify, test, correct and document new and existing programs using assigned languages, tools and coding conventions;
• Prepare and document test data;
• Prepare and set up testing and production environment;
• Prepare and maintain program and system documentation;
• Assist in establishing file structures and processing logic requirements;
• Produce deliverables according to group standards and procedures;
• Assist Project Leaders in the study and design of application systems and work coordination, project management and user training work;
• Troubleshooting and supporting end-users in the implementation and maintenance of application systems;
• Train other contract programmers in the relevant skills;
• Participate in Disaster Recovery activities eg simulation exercise at Disaster Recovery sites;
• Learn / pick up new programming skills related to System Development and Maintenance as assigned by the supervisors;
• Any other tasks related to System Development and Maintenance as assigned by the supervisors.

Job Requirements:

(i) Shall have at least three (3) years’ post graduate experience in designing, programming, testing and maintaining a Lotus Notes workflow system (containing forms, views, navigators, script libraries, pages, outlines, images & agents), within the past 4 years timeframe, which is workable in:

a) Lotus Notes Client (version 9.xx and above)

b) Internet Explorer/Web Browser (when deployed with a Web UI front)

(ii) Shall have at least three (3) years’ post graduate experience, within the past 4 years timeframe, in designing, programming, testing and maintaining a Lotus Notes workflow system, within the past 4 years timeframe, using the following programming languages:

• LotusScript
• JavaScript
• Java
• HTML / XML
• Lotus Notes @Formula
• Lotus Notes SimpleAction

(iii) Be experienced in the application and implementation of Replication, Security and ACL settings in Lotus Notes applications.

(iv) Preferably have hands-on experience on:

• Secure web coding to prevent Domino web application vulnerabilities (e.g. Cross-site scripting; Injection vulnerability flaws such as SQL injection, command injection; Race conditions; Improper error / exception handling etc)
• jQuery coding and knowledge
• The management of Web Service Providers/Consumers and Jars in a Lotus Notes application
• Establishing connections between different data stores/platforms for interfacing (e.g. FTP, JDBC)

Job Responsibilities:

• Code, modify, test, correct and document new and existing programs using assigned languages, tools and coding conventions;
• Prepare and document test data;
• Prepare and set up testing and production environment;
• Prepare and maintain program and system documentation;
• Assist in establishing file structures and processing logic requirements;
• Produce deliverables according to group standards and procedures;
• Assist Project Leaders in the study and design of application systems and work coordination, project management and user training work;
• Troubleshooting and supporting end-users in the implementation and maintenance of application systems;
• Train other contract programmers in the relevant skills;
• Participate in Disaster Recovery activities eg simulation exercise at Disaster Recovery sites;
• Learn / pick up new programming skills related to System Development and Maintenance as assigned by the supervisors;
• Any other tasks related to System Development and Maintenance as assigned by the supervisors.

Job Requirements:

(i) Shall have at least three (3) years’ post graduate experience in designing, programming, testing and maintaining a Lotus Notes workflow system (containing forms, views, navigators, script libraries, pages, outlines, images & agents), within the past 4 years timeframe, which is workable in:

a) Lotus Notes Client (version 9.xx and above)

b) Internet Explorer/Web Browser (when deployed with a Web UI front)

(ii) Shall have at least three (3) years’ post graduate experience, within the past 4 years timeframe, in designing, programming, testing and maintaining a Lotus Notes workflow system, within the past 4 years timeframe, using the following programming languages:

• LotusScript
• JavaScript
• Java
• HTML / XML
• Lotus Notes @Formula
• Lotus Notes SimpleAction

(iii) Be experienced in the application and implementation of Replication, Security and ACL settings in Lotus Notes applications.

(iv) Preferably have hands-on experience on:

• Secure web coding to prevent Domino web application vulnerabilities (e.g. Cross-site scripting; Injection vulnerability flaws such as SQL injection, command injection; Race conditions; Improper error / exception handling etc)
• jQuery coding and knowledge
• The management of Web Service Providers/Consumers and Jars in a Lotus Notes application
• Establishing connections between different data stores/platforms for interfacing (e.g. FTP, JDBC)

Responsibilities
As a Full-Stack Engineer, you need to:

• Be responsible for designing, developing, deploying, and maintaining scalable, high-performance, and secure web applications. The role requires expertise in frontend and backend development, cloud technologies, DevOps automation, and application security. Engineers must work in an agile, DevOps-driven environment, ensuring high software quality, security, and maintainability.
• Take full ownership of end-to-end application development, integrating frontend, backend, and cloud infrastructure.
• Design, develop, and maintain responsive, accessible, and performant web applications.
• Implement modern frontend architectures, ensuring reusability, scalability, and security.
• Develop high-performance backend services and APIs, ensuring reliability, security, and observability.
• Work with Quality Assurance (QA) engineers to ensure automated test coverage and proactively fix bugs and defects.
• Optimize full-stack CI/CD deployment strategies, ensuring seamless and automated releases.
• Work with DevOps teams to automate infrastructure provisioning, monitoring, and cloud deployments.
• Ensure full-stack security, including authentication, authorization, API security, and frontend security best practices.
• Continuously evaluate and adopt emerging technologies to improve application performance and developer productivity.

Requirements
As a Full-Stack Engineer, you need to have:

• Degree/Diploma in Computer Science, IT, Engineering, or related field.
• Strong frontend & backend development experience; proficient with Git workflows.

Frontend:

• JavaScript/TypeScript; frameworks like React, Next.js, Vue, Angular, or Svelte
• Mobile: Swift, Kotlin, or React Native
• UI tools: Tailwind, Material-UI, Bootstrap; Figma for design

Backend:

• Node.js (Express/NestJS), Python (Django/Flask/FastAPI), Java/Kotlin (Spring Boot), Ruby on Rails, or Go
• APIs: REST, GraphQL, gRPC, WebSockets

Observability:

• APM tools (Datadog, New Relic, Prometheus, etc.)
• Logging (ELK, Loki); dashboards & alerts

Scalability & APIs:

• API design, caching (Redis), rate limiting
• Scaling strategies (load balancing, autoscaling)

DevOps & Cloud:

• CI/CD (GitHub Actions, Jenkins, etc.)
• Cloud (AWS, Azure, GCP)
• Docker, Kubernetes, IaC (Terraform, CloudFormation)

Security:

• Frontend (CORS, XSS), Backend (OAuth, JWT), Cloud (IAM, OWASP)

Testing:

• Unit & integration testing (Jest, Cypress, Postman, etc.)

Bonus:

• Low-code tools, micro-frontends, edge computing