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Unison Group (also known as Unison Consulting) is a technology consulting and services firm that specializes in providing specialized IT staff and systems integration for client projects in the banking and financial services sectors.

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Posted 2mo ago

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

@ Unison Group
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Kuala Lumpur, Federal Territory of Kuala Lumpur, Malaysia
HybridFull Time
Responsibilities:Design APIs, Develop microservices, Mentor juniors
Requirements Summary:5+ years backend Java experience; strong Java (8/11/17+); Spring Boot/MVC/Spring Security; RESTful APIs; microservices; SQL with Hibernate/JPA; OAuth2/JWT API security; Git, Maven/Gradle; Docker/CI/CD; concurrency knowledge.
Technical Tools Mentioned:Java, Spring Boot, Spring MVC, Spring Security, REST, OAuth2, JWT, Git, Maven, Gradle, Docker, Hibernate, JPA, MySQL, PostgreSQL, Oracle
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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.