CodeNinja Inc.

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

CodeNinja Inc.  •  Riyadh, SA (Onsite)  •  2 hours ago
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Job Description

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/ 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
  • Containerize applications using Docker and deploy on Kubernetes/OpenShift
  • Implement authentication/authorization using OAuth2/JWT standards
  • Write unit, integration, and contract tests
  • Collaborate with DevOps on CI/CD pipelines
  • Participate in code reviews, design discussions, Agile ceremonies
  • Monitor, troubleshoot, and optimize microservices performance in production

Requirements

  • 5+ years of experience in Java backend development
  • Strong hands-on experience with Spring Boot and Quarkus
  • Solid understanding of microservices architecture
  • Familiarity with API security and performance optimization
  • Java 11+ specifically (not just "Java backend development")
  • OpenShift alongside Kubernetes (currently only Docker/K8s is nice-to-have — should move to required)
  • Proficiency with Git and CI/CD tools (Jenkins, GitLab CI)
  • Working knowledge of SQL/NoSQL databases

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)
  • Apache Kafka or other messaging/event-streaming platforms
  • Observability tools — Prometheus, Grafana, ELK

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.

CodeNinja Inc.

About CodeNinja Inc.

CodeNinja is a Middle Eastern–American Software & AI company helping businesses build AI systems and learning architectures for mission-critical workloads.

With offices in Seattle, San Francisco, Riyadh, and Lahore, our work centers on enabling organizations to develop capabilities across workplaces and factory floors using both open-source and proprietary AI models, spanning generative and deterministic systems.

We believe most workplaces and factory floors are not ready for the post-AGI era of work. Our mission is to help enterprises reimagine how work itself is organized and executed so that human talent and automation not only coexist but thrive. We call this mission: “Reimagining Workplaces for Post-AGI Readiness.”

At the core of our approach is Hyper Tools, our integrated Platform + Services model, designed to accelerate the creation of AI applications and agents in complex domains. Hyper Tools reduces the generality of large models through reinforcement learning, rapid development workflows and purpose built synthetic and manual Data creation.

Our focus spans four core thrust areas:

Physical AI Systems – Building AI/ML systems for physical infrastructure. Some of the world’s leading chemical and energy companies rely on CodeNinja’s outcome-based, vendor-independent models to enhance operational efficiency and revenue.

Work AI – Developing agentic AI systems that transform workplace processes into adaptive, intelligent experiences.

Hyper Core – Enabling enterprises to build software and automation layers in-house instead of outsourcing to Software Services Vendors.

Global Capability & AI Centers – Partnering with universities and developer communities in South Asia and South America to build AI and research talent pipelines, helping global companies scale their capabilities sustainably.

Founded by 4 Engineers and incredible team of operators, CodeNinja is united by this mantra of " Inspiration and Innovation for every knowledge worker in the world"

Industry
IT & Software
Company Size
201-500 employees
Headquarters
Austin, Texas
Year Founded
2014
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