Lead Back-end Java Developer (Spring Boot, Agile)

We are seeking a Lead Java Developer in Singapore. You lead hands-on delivery of banking-grade Back-end services built on Java 21, Spring Boot, microservices and REST APIs. You shape architecture, set engineering standards and partner with DevOps to run containerized workloads on OpenShift/Kubernetes with strong testing, security and observability.

Responsibilities

• Lead the design and implementation of Java 21, Spring Boot Back-end services
• Define microservice boundaries, API contracts, data models and integration patterns
• Build resilient REST APIs with clear error handling, versioning and documentation
• Guide synchronous and event-driven service communication and integration decisions
• Partner with DevOps to containerise, deploy and operate services on OpenShift
• Establish coding standards, reusable patterns and review practices across the team
• Improve quality through automated testing, CI/CD and code scanning tools
• Troubleshoot production issues with SRE and platform teams and drive root-cause fixes

Requirements

• Java expertise including hands-on work with modern Java LTS versions (Java 21 on this project)
• Spring Boot background across Spring Framework and Spring MVC
• Microservices design experience including distributed systems fundamentals
• REST API design skills including API gateway and system integration concepts
• SQL proficiency with relational databases (Oracle, MariaDB, MySQL or PostgreSQL)
• Containers experience with Docker and cloud-native delivery practices
• Kubernetes/OpenShift exposure deploying or supporting containerised applications
• Testing capability using JUnit, Mockito plus unit and integration automation

Nice to have

• Spring Cloud, Apache Kafka or RabbitMQ for event streaming and messaging
• Observability experience with ELK/OpenSearch, AppDynamics or Grafana
• Domain exposure to banking or financial services