Senior Java Software Engineer

Systems Limited - APAC; Kuala Lumpur; On-site; MYR 90,000 - 150,000; Full time

Job summary

Systems Limited - APAC is seeking a skilled Java backend developer in Kuala Lumpur to design and implement scalable backend services using Spring Boot. You will build microservices with REST APIs, enforce proper auth, validation, logging and error handling, and contribute to automated testing and code reviews.

Collaborate with Product, QA, and DevOps across Dev/Test/Prod environments, and participate in CI/CD deployments while optimizing performance and reliability in production.

Qualifications

• Strong hands-on experience in Spring Framework / Spring Boot.
• Solid experience in Microservices architecture (service decomposition, communication, resilience basics).
• Strong Java skills including modern Java (Java 8+): streams, lambdas, optional, concurrency fundamentals.
• Core Java foundations: OOP, collections, exceptions, generics, multithreading basics.
• RESTful APIs, API versioning, backward compatibility.
• SQL/NoSQL: PostgreSQL/MySQL/MongoDB (any).
• Testing: JUnit, Mockito (plus integration testing is a bonus).
• Git and standard branching/version control practices.
• Understanding of CI/CD (Jenkins/GitHub Actions/Azure DevOps).
• Exposure to DevOps practices and Azure/AWS basics.

Responsibilities

• Develop and maintain backend services using Spring / Spring Boot.
• Build microservices with REST APIs, clear service boundaries, and reusable components.
• Implement authentication/authorization, validation, logging, and error handling patterns.
• Write unit and integration tests; participate in code reviews and refactoring.
• Collaborate with Product, QA, and DevOps for delivery across Dev/Test/Prod environments.
• Troubleshoot production issues and optimize performance and reliability.
• Support release activities and CI/CD deployments.

Skills

Spring Framework / Spring Boot

Microservices architecture

Java 8+ (Streams, Lambdas, Optional, 1

Core Java fundamentals

RESTful APIs

SQL/NoSQL databases

JUnit/Mockito

Git

CI/CD (Jenkins/GitHub Actions/AzureDev

DevOps basics (Azure/AWS)

API versioning

Tools

PostgreSQL

MySQL

MongoDB

Job description

Responsibilities:

• Develop and maintain backend services using Spring / Spring Boot
• Build microservices with REST APIs, clear service boundaries, and reusable components
• Implement authentication/authorization, validation, logging, and error handling patterns
• Write unit and integration tests; participate in code reviews and refactoring
• Collaborate with Product, QA, and DevOps for delivery across Dev/Test/Prod environments
• Troubleshoot production issues and optimize performance and reliability
• Support release activities and CI/CD deployments

Requirements:

• Strong hands-on experience in Spring Framework / Spring Boot
• Solid experience in Microservices architecture (service decomposition, communication, resilience basics)
• Strong Java skills including modern Java (Java 8+): streams, lambdas, optional, concurrency fundamentals
• Core Java foundations: OOP, collections, exceptions, generics, multithreading basics
• RESTful APIs, API versioning, backward compatibility
• SQL/NoSQL: PostgreSQL/MySQL/MongoDB (any)
• Testing: JUnit, Mockito (plus integration testing is a bonus)
• Git and standard branching/version control practices
• Understanding of CI/CD (Jenkins/GitHub Actions/Azure DevOps)
• Exposure to DevOps practices and Azure/AWS basics