Full Stack Java Developer (Payment Applications)

Job Title: Java Developer / Software Engineer

Location: Singapore

Experience Required: 6 - 15 Years

Prior Background:

• Minimum 6+ years in Payments Technology solutions as a Full-stack Developer, Integration Developer, or Solution Architect.
• Experience across various SDLC phases: architecture, technical design, development, deployment, go-live, testing, and support.

Technical Skills:

• Core Java, Spring Boot, Kafka, Kubernetes, Postgres, Camunda (workflow), MongoDB, React.js, Spring Batch, Redis (cache)
• Strong skills in key J2EE technologies: Core Java, EJB, JSP, JDBC, Java Mail, XML, JAXP, JAAS, JMS, JSTL, JTA, batch
• Experience with integration design patterns (API, MQ, etc.)
• Frameworks: Spring, Hibernate, Struts, Jasper, Quartz
• Good knowledge of MongoDB (preferred), MySQL
• Fully conversant in Interface design, Database design, OOAD
• Experience with CI/CD processes and tools like Jenkins

Primary Skills:

• Exposure to Banking and Payments domain
• Experience with Payment processing systems/products/applications, payments workflow, various payments schemes and frameworks
• Experience with payments hub integration (e.g., GPP, OPF, Icon, IPF, ACI, UPI)
• Experience in Microservices architecture
• Design and build of integration components
• Data structures and algorithms, design patterns, and object-oriented design principles
• Building highly scalable distributed systems
• Building resilient applications/products supporting high throughput and high-volume/TPS 24x7x365

Responsibilities:

• Execute tasks as per instructions or run books provided by the team lead or architect
• Perform Payment Hub related build and integration activities
• Support system architecture design across business areas
• Own end-to-end application delivery for specified projects, engaging all technical component teams
• Ensure project designs comply with architecture standards
• Lead and manage a team (for Senior Developers)
• Design, develop, implement, and maintain programs, subsystems, and enhancements of existing apps
• Support deployment activities as per defined processes
• Ensure prerequisites are met before deployment; execute rollback procedures if required
• Troubleshoot incidents during deployment
• Perform operational readiness tasks and ensure production acceptance criteria are met
• Ensure functional and NFR requirements (capacity, availability, response times, fault tolerance, etc.) are delivered as agreed