Java Application Developer

Optimum Solutions Pte Ltd; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Optimum Solutions Pte Ltd is seeking a seasoned backend engineer to design and implement production-grade microservices on AWS. You will collaborate with a Solution Architect to ensure secure, scalable code, support testing, and assist customers during go-live.

The role requires 6–8 years of backend experience, strong Java/J2EE skills, REST APIs, Spring, and Docker/Kubernetes expertise. Familiarity with financial/payments domains is a plus.

Qualifications

• 6-8 years hands-on backend development delivering production-grade systems.
• Strong experience with AWS-native systems and operations.
• Familiarity with CI/CD pipelines and tools (Jenkins, Bitbucket, Octopus, Terraform).
• 5+ years in Java, J2EE, SQL/PLSQL, and XML.
• Experience with RESTful APIs, Spring 5.x/Boot/Framework/Security, cloud/microservices.
• Messaging middleware such as Kafka/IBM MQ/Solace.
• Container platforms like Docker/OpenShift/Kubernetes.
• Good verbal and written communication, analytical and teamwork skills.
• Domain knowledge in financial/payments is a plus.

Responsibilities

• Analyze and design code changes with Solution Architect/Tech Lead.
• Ensure compliance with coding, security standards, and processes.
• Support system integration testing and resolve issues.
• Assist internal/external parties during testing stages.
• Support customers during acceptance testing and post-cutover.
• Develop training materials and conduct presentations.

Skills

Backend development

AWS

Java/J2EE

APIs & microservices

CI/CD

Spring Framework

Docker/Kubernetes/OpenShift

RESTful services

Messaging middleware

Communication skills

Analytical thinking

Education

Diploma or Bachelor's in CS/Engineering

Tools

Jenkins

Bitbucket

Octopus

Terraform

Kafka

IBM MQ

Solace

Docker

OpenShift

Kubernetes

Job description

• Work with Solution Architect/Technical Lead on the analysis and design of the code changes according to the finalized requirement specifications
• Ensure work performed comply to coding and security standards, and corporate processes
• 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 6-8 years hands-on experience in backend development delivering production-grade systems (microservices, APIs, event processing, web-portal, production support).
• Strong experience with AWS-native systems and operations (any of the following):
• - 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