Senior Java API Developer
Summary
A senior backend engineer role in Kuala Lumpur focused on designing, building, and optimizing scalable Java Spring Boot microservices and secure RESTful APIs (OAuth2/JWT). The person also mentors junior developers, joins architecture reviews, and contributes to CI/CD and engineering best practices.
Full time | Flintex Consulting Pte Ltd | Malaysia
Posted On 28/09/2026
Job Information
Work Experience 5+ years
Technology
MYR 8000 - MYR 10000
City Kuala Lumpur
State/Province Wilayah Persekutuan Kuala Lumpur
50000
Job Description
Position Summary
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
Requirements
- 5+ years of backend development experience.
- Strong expertise in Java (8/11/17+).
- Solid experience with Spring Boot, Spring MVC, Spring Security.
- 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).
- 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