Application Maintenance Engineer

Optimum SolutionsSingaporemycareersfuturepublished 10/19/2026
Must-have:JavaSwiftQA/TestCI/CDMicroservicesFinTech

Your tasks

  • Perform root cause analysis and resolve application, batch processing, database and connectivity issues.
  • Develop, maintain and troubleshoot applications using Java, Spring Boot, REST APIs and microservices.
  • Support FIS Open Payment Framework (OPF), including defect remediation, troubleshooting and production deployment.
  • Conduct SIT, support UAT, validate fixes and coordinate production releases based on defect priority.
  • Monitor application performance and troubleshoot issues across databases, middleware, operating systems and messaging platforms.
  • Manage incident, problem and defect lifecycles, ensuring timely resolution and compliance with closure KPIs.
  • Coordinate with development, QA, infrastructure teams and vendors to maintain production stability and improve application quality.

Requirements

  • Degree in Computer Science, Information Technology or a related discipline, with at least 6 years of relevant experience.
  • Strong hands-on experience in Java, Spring Boot, REST APIs, microservices and Hibernate ORM.
  • Mandatory experience in FIS Open Payment Framework (OPF) troubleshooting, maintenance and deployment.
  • Experience with SQL/Oracle databases, Linux/Solaris, JBoss, OpenShift and Apache.
  • Knowledge of messaging and scheduling tools such as Kafka, IBM MQ, Connect:Direct and Control-M.
  • Experience in production support, incident/problem management, CI/CD tools such as Jenkins, Bitbucket and SonarQube, and defect tracking using Remedy/JIRA.
  • Strong troubleshooting, analytical skills; payment domain and SWIFT messaging experience are advantageous.