Senior Java API Developer Role - Kuala Lumpur (Hybrid Model) - Only Malaysians

Unison Group; Kuala Lumpur; On-site; MYR 90,000 - 120,000; Full time

Benefits offered by this job

Annual Leave (AL): Up to 21 days per year

Medical Leave (ML): 12 days per annum

Medical Coverage provided

Performance Bonus: 2 bonuses per year

Public Holiday Replacement Leave

Optical and Dental Coverage

Job summary

Unison Group in Kuala Lumpur is seeking a Senior Java API Developer to design and optimize scalable backend services and RESTful APIs. This role demands strong hands-on coding ability, architectural thinking, and experience in building production-grade APIs. The ideal candidate will have at least 5 years of backend development experience, solid expertise in Java and Spring Boot, and a commitment to engineering best practices. Benefits include medical coverage and performance bonuses.

Qualifications

• 5+ years of backend development experience required.
• Strong expertise in Java (8/11/17+).
• Solid experience with Spring Boot, Spring MVC, Spring Security.

Responsibilities

• Design, develop, and maintain scalable RESTful APIs and microservices using Java and Spring Boot.
• Optimize application performance, troubleshoot bottlenecks, and resolve production issues.
• Collaborate with frontend developers, DevOps, QA, and product teams.

Skills

Java

Spring Boot

RESTful APIs

Microservices

SQL

API security

Docker

Git

Tools

Hibernate

Maven

Gradle

Job description

Skill: Java API Developer

Nationality Requirement: Malaysian Citizens Only

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.

Key Qualifications

• 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.

Benefits

• Annual Leave (AL): Up to 21 days per year
• Medical Leave (ML): 12 days per annum
• Medical Coverage provided
• Performance Bonus: 2 bonuses per year
• Public Holiday Replacement Leave
• Optical and Dental Coverage