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QUANTUM INFOTECH SOLUTIONS PTE. LTD.

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Senior Java Developer

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Summary

Senior Java backend developer building high-throughput, mission-critical digital banking microservices with Java 11/17, Spring Boot/Cloud, and event-driven messaging (Kafka, RabbitMQ, IBM MQ), plus CI/CD on Docker/Kubernetes and cloud (AWS/Azure). On-site in Singapore; 8+ years of Java and prior banking/fintech experience are mandatory.

We are seeking experienced Senior Java Backend Developers to design, build, and maintain high-throughput, mission-critical digital banking applications. The selected candidates will work within Agile delivery teams to develop scalable microservices and resilient API platforms supporting critical banking services.

Key Responsibilities

  • Design, develop, and deploy scalable Microservices using Java 11/17, Spring Boot, and Spring Cloud.
  • Build secure RESTful APIs and integrate backend services with core banking systems, payment gateways, and third-party financial services.
  • Implement event-driven solutions using Apache Kafka, RabbitMQ, or IBM MQ.
  • Optimize database performance and design solutions leveraging Oracle, PostgreSQL, Redis, and MongoDB.
  • Develop and maintain CI/CD pipelines using Git, Bitbucket, Jenkins, SonarQube, Maven/Gradle, Docker, and Kubernetes.
  • Perform code reviews, application testing, production support, and performance optimization.

Mandatory Skills

  • Bachelor's Degree in Computer Science, Information Technology, Software Engineering, or a related discipline.
  • Minimum 8 years of hands-on experience in Java Backend Development.
  • Strong expertise in Java 8/11/17, Spring Boot, Spring Security, Spring Data JPA, and Hibernate.
  • Experience in AWS / Azure Cloud.
  • Experience with Microservices Architecture, REST APIs, Design Patterns, and Distributed Systems.
  • Hands-on experience with Kafka, RabbitMQ, IBM MQ, or JMS.
  • Strong knowledge of Oracle DB, PostgreSQL, Redis, and MongoDB.
  • Experience with Docker, Kubernetes, Git, Jenkins, Maven/Gradle, and CI/CD practices.
  • Prior Banking, Financial Services, or FinTech experience is mandatory.

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