EXASOFT CONSULTING PTE. LTD. Hiring! Full Time Java Developer (Spring Security, JWT, SSO, DDD, OpenShift, Redis, WebSockets, Kafka) in Islandwide (Singapore), Earn up to SGD 8,500 - Ricebowl

Responsibilities

• Lead the design, development, and delivery of scalable enterprise applications using Java and Spring Boot.
• Design and implement microservices-based architectures and modernize legacy monolithic applications into scalable distributed services.
• Develop and integrate high-performance RESTful APIs for enterprise and banking applications.
• Design event-driven solutions using Apache Kafka for asynchronous communication and distributed application workflows.
• Implement application security using Spring Security, OAuth, JWT, SSO, and role-based access control (RBAC).
• Lead technical design activities including high-level and low-level architecture, component design, API integration, deployment, and data-flow design.
• Collaborate with frontend teams to integrate backend services with ReactJS and Angular applications.
• Work with relational and NoSQL databases and contribute to schema design and query optimization.
• Drive application performance, scalability, reliability, maintainability, and troubleshooting of complex production issues.
• Lead and mentor development teams, conduct code reviews, and establish development best practices.
• Collaborate with cross-functional teams to deliver integrated enterprise solutions and resolve complex technical issues.
• Support containerized and enterprise application environments using Docker and OpenShift.

Requirements

• 7+years of technical experience, with strong hands-on experience in architecture development, backend system integration, and application development.  
• Experience in Java, Spring Boot, Microservices, RESTful APIs, and Apache Kafka, with proven experience designing scalable enterprise architectures and leading technical teams.
• Strong hands-on experience in Java and enterprise application development.
• Strong experience in Spring Boot and Microservices architecture.
• Mandatory hands-on experience with Apache Kafka and event-driven architecture.
• Strong experience developing and integrating RESTful APIs.
• Mandatory experience with Spring Security, OAuth2, and JWT.
• Experience in SSO/RBAC is required.
• Hands-on experience with ReactJS or Angular; candidates with exposure to both are preferred.
• Strong experience with JavaScript and TypeScript.
• Experience with Spring Cloud and distributed application architecture.
• Strong database experience with MySQL, PostgreSQL, Oracle, or MongoDB, including schema design and query optimization.
• Experience with Docker and OpenShift in enterprise application environments.
• Experience in GraphQL, Swagger/OpenAPI, WebSockets, or messaging technologies is preferred.
• Experience in Domain-Driven Design (DDD) and event-driven design is preferred.
• Experience with caching technologies such as Redis, Ehcache, or Memcached is an advantage.
• Proven experience leading technical teams, mentoring developers, conducting code reviews, and driving technical delivery.
• Experience with system architecture, performance optimization, debugging, and software development best practices.