Software Developer

U3 SOLUTIONS PTE. LTD.; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

U3 Solutions PTE. LTD. seeks an experienced Software Developer to design, develop, and support enterprise web and client-server apps. The role emphasizes Java/J2EE, Spring Boot, microservices, and front-end tech like ReactJS/Angular, with API development and CI/CD expertise.

Candidates should have hands-on experience in architecture, database programming, automated testing, and production support across L1/L2/L3 environments, plus familiarity with financial services payment systems.

Qualifications

• Experience in financial services, banking, payment processing systems.
• Hands-on design, development, and support of enterprise apps.
• Experience with API development and database programming.

Responsibilities

• Design, develop, and maintain scalable enterprise apps using Java/J2EE and microservices.
• Develop and integrate RESTful and SOAP APIs for internal/external apps.
• Build responsive front-ends using ReactJS or Angular.
• Implement OO design, patterns, and SOLID principles.
• Develop and maintain databases (Oracle/SQL Server/MySQL/MongoDB).
• Develop asynchronous messaging using JMS/IBM MQ/Spring Integration.
• Write unit/integration tests (JUnit/Mockito/MockMVC/Cucumber).
• Automate build/deploy with Jenkins/Maven/Gradle/ANT.
• Participate in SDLC phases and provide production support.

Skills

Java/J2EE

Spring Boot

Microservices

RESTful APIs

SOAP Web Services

ReactJS/Angular

CI/CD pipelines

Unit testing

Tools

Jenkins

Maven

Git

Oracle

SQL Server

MySQL

MongoDB

IBM MQ

Job description

Job Summary

We are looking for an experienced Software Developer with experience in designing, developing, enhancing, and supporting enterprise-level web and client-server applications. The ideal candidate should have strong expertise in Java/J2EE, Spring Boot, Microservices, RESTful and SOAP Web Services, and front-end technologies such as ReactJS or Angular.

The candidate should have hands-on experience in application architecture, API development, database programming, automated testing, CI/CD pipelines, and production support across L1/L2/L3 environments.

Must have:

Experience in financial services, banking, payment processing systems.

Key Responsibilities:

• Design, develop, and maintain scalable enterprise applications using Java, Java EE, Spring Boot, Spring MVC, and Microservices architecture.
• Develop and integrate RESTful and SOAP APIs to facilitate communication between internal and external applications.
• Build responsive front-end applications using ReactJS, Angular, JavaScript, HTML, CSS, jQuery, and AJAX.
• Design and implement application modules using object-oriented programming principles, design patterns, and SOLID principles.
• Develop and maintain database components, including SQL queries, PL/SQL, stored procedures, and database integrations using Oracle, SQL Server, MySQL, or MongoDB.
• Develop and maintain asynchronous messaging and integration solutions using JMS, IBM MQ, Spring Integration, and related messaging technologies.
• Implement unit and integration tests using JUnit, Mockito, MockMVC, and Cucumber to ensure application quality and reliability.
• Automate build, deployment, and release processes using Jenkins, Maven, Gradle, and ANT.
• Participate in all phases of the Software Development Life Cycle (SDLC), including requirements gathering, technical design, development, testing, deployment, and maintenance.
• Provide L1/L2/L3 application support, troubleshoot production incidents, perform root cause analysis, and implement permanent fixes.
• Monitor application performance, resolve technical issues, and coordinate with business stakeholders, architects, infrastructure teams, and developers.
• Prepare technical specifications, architecture documents, deployment procedures, standard operating procedures (SOPs), and support documentation.
• Participate in code reviews, technical discussions, effort estimation, risk assessment, and solution design.
• Collaborate with onsite and offshore teams to deliver enhancements and releases within agreed timelines.
• Support CI/CD activities, production releases, and application upgrades while ensuring system stability and business continuity.

Required Technical Skills

• Programming: Java, Java EE/J2EE, OOP, Core Java
• Backend Frameworks: Spring Boot, Spring MVC, Spring Core, Spring Integration, Spring Batch, Hibernate
• Architecture: Microservices, REST APIs, SOAP Web Services, MVC, Design Patterns
• Frontend: ReactJS, Angular, JavaScript, HTML, CSS, jQuery, AJAX
• Databases: Oracle, SQL Server, MySQL, MongoDB, SQL, PL/SQL, Stored Procedures
• Messaging: JMS, IBM MQ, HornetQ
• Testing: JUnit, Mockito, Mock MVC, Cucumber, JMeter
• Build and CI/CD: Jenkins, Maven, Gradle, ANT
• Version Control: Git, SVN, CVS
• API Testing: Postman, SoapUI
• Application Servers: JBoss, Tomcat, IBM WebSphere
• Operating Systems: Linux, Unix, Windows

Preferred Qualifications

• Experience with payment systems, transaction processing, message validation, and integration with external financial systems.
• Experience in production troubleshooting, incident management, root cause analysis, and application modernization.
• Knowledge of Agile/Scrum methodologies and effective collaboration with business and technical stakeholders.
• Experience in automating batch processing and scheduled jobs using enterprise job schedulers such as Control-M or Windows Scheduler.