Senior Java Developer

Quantum Infotech Solutions; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Quantum Infotech Solutions is seeking experienced Senior Java Backend Developers to design, build, and maintain high-throughput digital banking applications. You will work in Agile delivery teams to develop scalable microservices and resilient API platforms supporting critical banking services.

The role requires 8+ years of hands-on Java backend development with Java 8/11/17, Spring Boot, and Spring Security; experience in AWS/Azure Cloud, and a strong foundation in microservices, REST APIs, and

Qualifications

• Bachelor's degree in CS/IT/SE or related.
• 8+ years Java backend experience.
• Expertise in Java 8/11/17, Spring Boot, Spring Security.
• Cloud experience with AWS or Azure.
• Microservices, REST APIs, distributed systems experience.
• Kafka, RabbitMQ, IBM MQ, or JMS experience.
• Oracle, PostgreSQL, Redis, MongoDB knowledge.
• Docker, Kubernetes, CI/CD tools familiarity.
• Prior Banking/FinTech experience is mandatory.

Responsibilities

• Design, build, and maintain scalable Java backend systems for digital banking.
• Develop microservices with Java 11/17, Spring Boot, and Spring Cloud.
• Create secure RESTful APIs and integrate with core banking systems.
• Implement event-driven solutions using Kafka, RabbitMQ, or IBM MQ.
• Optimize databases (Oracle, PostgreSQL, Redis, MongoDB) for performance.
• Develop and maintain CI/CD pipelines using Git, Jenkins, Maven/Gradle, Docker, and Kubernetes.

Skills

Java backend

Spring Boot

Microservices

REST APIs

Kafka

Docker

Kubernetes

CI/CD

Security

Distributed systems

Education

Bachelor's Degree in CS/IT/SE

Tools

AWS

Azure

Oracle DB

PostgreSQL

Redis

MongoDB

Job description

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.