Sr. Java Developer

INFRASOFT TECHNOLOGIES PTE LTD; Singapore; On-site; SGD 70,000 - 100,000; Full time

Job summary

A tech company in Singapore is seeking an experienced Java Developer with a focus on security to develop secure applications. The ideal candidate will have strong skills in Core Java, Spring boot, and RESTful API design. Responsibilities include building microservices, collaborating with teams, and ensuring security best practices. Candidates should have experience with Spring Security and OAuth2.

Responsibilities

• Develop and maintain secure Java-based applications using Spring Boot.
• Implement and configure Spring Security for application authentication and authorization.
• Build scalable REST APIs and microservices.
• Collaborate with front-end teams and DevOps for end-to-end delivery.
• Conduct code reviews, performance tuning, and ensure adherence to security best practices.

Skills

Core Java, Java 8+

Spring Framework, Spring Boot

Spring Security – authentication, authorization, JWT, OAuth2

RESTful API design and integration

Microservices architecture

JPA/Hibernate

SQL / NoSQL Databases

CI/CD, Docker, Kubernetes

Job description

Java Developer – Spring Boot (Security Focus)

Experience: 7+

Key Skills

• Core Java, Java 8+
• Spring Framework, Spring Boot (mandatory)
• Spring Security – authentication, authorization, JWT, OAuth2
• RESTful API design and integration
• Microservices architecture
• JPA/Hibernate
• SQL / NoSQL Databases (MySQL, PostgreSQL, MongoDB, etc.)
• Familiarity with CI/CD, Docker, or Kubernetes (preferred)

Responsibilities

• Develop and maintain secure Java-based applications using Spring Boot.
• Implement and configure Spring Security for application authentication and authorization.
• Build scalable REST APIs and microservices.
• Collaborate with front-end teams and DevOps for end-to-end delivery.
• Conduct code reviews, performance tuning, and ensure adherence to security best practices.

Preferred

• Experience with OAuth2 / OpenID Connect / JWT.
• Exposure to cloud platforms (AWS, Azure, or GCP).