Senior Java Backend Developer (Spring Boot / Quarkus / API)

About This Role

About CodeNinja CodeNinja is a next-generation technology consulting firm specialising in AI-powered transformation, enterprise software delivery, and Quality Engineering. Headquartered in the Gulf region and operating across the MENA, South Asia, and global markets, CodeNinja partners with Tier-1 banks, government entities, and large enterprises to design, build, and run mission-critical technology programs.

With deep expertise in QA transformation, test automation, DevOps modernisation, and AI/ML engineering, CodeNinja's teams combine global delivery standards with in-market contextual knowledge — ensuring outcomes that are compliant, scalable, and commercially aligned with client objectives.

For the Client's Test Management Enablement & Automation engagement, CodeNinja brings a dedicated 12-person specialist team spanning Test Management, Automation Engineering, AI/ML, and Performance Testing — all governed under a structured 20-week program delivery framework.

About the Role We are looking for a highly skilled Senior Java Backend Developer with strong expertise in building scalable microservices and APIs. The ideal candidate will have hands-on experience with Spring Boot or Quarkus and API management using IBM API Connect (APIC). Experience in the Open Banking domain will be considered a strong advantage.

Key Responsibilities* Design, develop, and maintain scalable microservices using Spring Boot and/or Quarkus

• Build, publish, and manage APIs using IBM API Connect (APIC)
• Ensure high performance, security, and scalability of backend systems and APIs
• Collaborate with cross-functional teams including product, QA, and DevOps
• Troubleshoot, debug, and resolve production issues efficiently
• Follow best practices for clean code, testing, and system design

Requirements

• 5+ years of experience in Java backend development
• Strong hands-on experience with Spring Boot or Quarkus
• Experience working with IBM API Connect (APIC) and RESTful APIs
• Solid understanding of microservices architecture
• Familiarity with API security and performance optimization

Nice to Have* Experience in Open Banking or financial services domain

• Knowledge of OAuth2, JWT authentication
• Hands-on experience with Docker, Kubernetes, and cloud platforms (AWS, Azure, or GCP)

Why Join Us* Opportunity to work on scalable, enterprise-level systems

• Collaborative and growth-focused environment
• Exposure to modern technologies and architecture

Disclaimer This job description outlines the primary responsibilities and qualifications for the role at the time of posting. It is not exhaustive and may evolve in line with business needs and project requirements. CodeNinja reserves the right to modify role scope as the engagement progresses.

All candidates will be subject to standard background verification. Onsite positions require compliance with the client's site access, security, and NDA policies. CodeNinja is an equal opportunity employer and welcomes applications from all qualified individuals regardless of background.