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optimum solutions (singapore) pte ltd

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Senior Java Developer

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Summary

Senior Java backend developer in Singapore building and supporting production-grade microservices, APIs and event-processing systems on AWS cloud-native infrastructure (ECS/Fargate, RDS, S3), using Spring Boot, messaging middleware like Kafka, and Docker/Kubernetes, plus documentation, testing, code reviews and post-cutover customer support.

Responsibilities : Participate in the requirement elicitation and produce the required technical and operations documentation Work with Solution Architect/Technical Lead on the analysis and design of the code changes according to the finalized requirement specifications Perform code changes and test the system according to the requirements specifications Ensure work performed comply to coding and security standards, and corporate processes Perform quality assurance (QA) activities such as unit testing, system testing and code review Participate in the system integration testing by rendering support to the Test Team and resolving issues reported. Provide support to internal and external parties during the testing stages Provide support to customers during acceptance testing and post-cutover implementation. Assist in the development of training materials and conducting of presentation Requisites : Diploma or bachelor's degree in computer science/engineering or equivalent education Minimum 8 years hands-on experience in

Java backend development

delivering production-grade systems (microservices, APIs, event processing, web-portal, production support). Strong experience with cloud native systems and operations (any of the following): API Gateway / ALB, ECS/Fargate, RDS, S3, CloudWatch/CloudTrail, WAF Familiarity with CI/CD pipelines and tools such as Jenkins / Bitbucket / Octopus / Terraform (or equivalents). Good technical knowledge with at least 5 years of hands-on experience in Java, J2EE, SQL/PLSQL, and XML. Experienced with RESTFul APIs, Spring 5.x, Spring Boot, Spring Framework, Spring Security, Cloud-Based technologies and Micro-services, including Messaging Middleware such as Kafka/IBM MQ/Solace. Experienced with application running in container platform (Docker, OpenShift, Kubernetes). Good verbal and written communication skills Demonstrate good analytical, problem solving and decision-making skills Good team player and positive attitude Domain knowledge and experience in financial industry/payments systems is a plus

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