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Flintex Consulting Pte Ltd

Senior Java API Developer

Flintex Consulting Pte Ltd Kuala Lumpur, Malaysia · MYR 96K–MYR 120K/yr

Staffing and Recruiting · 11-50 employees

Sep 07
java Senior (5-10 yrs) Full-time Malaysia
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About the role

Design, develop, and maintain scalable RESTful APIs and microservices while ensuring high-performance backend architecture. Collaborate with cross-functional teams to deliver features, mentor junior developers, and implement robust API security standards.

What they look for

Java Spring Boot RESTful APIs Microservices SQL Hibernate JPA OAuth2 JWT Git Maven Gradle Docker CI/CD Multithreading API Security

Requirements

Requires 5+ years of backend development experience with strong expertise in Java, Spring Boot, and microservices architecture. Candidates must have hands-on experience with SQL, ORM frameworks, and API security protocols like OAuth2 and JWT.

Full 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.
  • 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

Working hours:

Mon to Fri 9am-6pm

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