Senior Java API Developer

Job ID: 7XW55W65

Location: Kuala Lumpur

Work Mode: Onsite

Employment type: Permanent

Eligibility: No visa sponsorship available

Role Overview

We are looking for a highly skilled Senior Java API Developer to design develop and optimize scalable backend services and RESTful APIs. You will play a key role in architecting secure high-performance systems mentoring junior developers and driving engineering best practices across the team.

This role requires strong hands-on coding ability architectural thinking and experience building production-grade APIs in cloud or enterprise environments.

Key Responsibilities

• Design develop and maintain scalable RESTful APIs and microservices using Java and Spring Boot.
• Architect secure high-availability backend systems with performance optimization in mind.
• Implement clean testable and maintainable code following SOLID principles.
• Optimize application performance troubleshoot bottlenecks and resolve production issues.
• Collaborate with frontend developers DevOps QA and product teams to deliver high-quality features.
• Participate in architecture discussions and technical design reviews.
• Implement API security standards (OAuth2 JWT API Gateway policies).
• Ensure code quality through unit testing integration testing and code reviews.
• Mentor junior developers and promote engineering best practices.
• Contribute to CI/CD pipelines and DevOps improvements.

Technical Requirements

Must-Have

• 5 years of backend development experience.
• Strong expertise in Java (8/11/17).
• Solid experience with Spring Boot Spring MVC Spring Security.
• Hands-on experience building RESTful APIs.
• Experience with microservices architecture.
• Strong knowledge of SQL (MySQL/PostgreSQL/Oracle) and ORM frameworks (Hibernate/JPA).
• Experience with API security (OAuth2 JWT).
• Familiarity with Git Maven/Gradle.
• Experience working with Docker and CI/CD pipelines.
• Strong understanding of data structures concurrency and multithreading.

Good to Have

• Experience with Kafka or RabbitMQ.
• Cloud deployment experience (AWS Azure or GCP).
• Kubernetes knowledge.
• Experience with API documentation tools (Swagger / OpenAPI).
• Experience in fintech or high-transaction systems.

Soft Skills

• Strong analytical and problem-solving skills.
• Ability to work independently and lead technical initiatives.
• Excellent communication and stakeholder management skills.
• Proactive mindset with ownership mentality.