About CodeNinja CodeNinja is a full-stack AI and engineering delivery firm helping Saudi enterprises and government entities modernize systems and operationalize intelligence across mission-critical workflows. Through embedded engineering teams, AI labs, and global capability centers, CodeNinja builds sovereign AI systems and application infrastructure that clients own permanently — aligned with Vision 2030. CodeNinja operates across Saudi Arabia's priority sectors, including government digitization, energy, financial services, logistics, and healthcare, and is trusted by 240+ organizations across 15+ industries region-wide. About the Role We're hiring a Senior IBM App Connect Developer to design, build, and support enterprise integration solutions connecting a leading Saudi bank's core and peripheral systems. This is a hands-on middleware role requiring deep IBM ACE/IIB expertise and prior banking-sector delivery experience, working onsite in Saudi Arabia on a 6-month (extendable) engagement. Key Responsibilities Design, develop, and deploy integration flows using IBM App Connect Enterprise (ACE) / IBM Integration Bus (IIB) Build message flows and ESQL/Java transformations to integrate core banking and peripheral applications Implement integrations over MQ, REST, SOAP, JMS, and file-based protocols Configure and maintain IBM MQ queues, channels, and messaging infrastructure supporting integration flows Ensure integration security, message reliability, and transactional integrity across interfaces Perform capacity planning, performance tuning, and monitoring of middleware components Diagnose and resolve production integration incidents with timely root-cause analysis Document integration designs, interface specifications, and deployment procedures Requirements Must-Have Requirements 7+ years of hands-on experience with IBM App Connect Enterprise (ACE) or IBM Integration Bus (IIB) Strong knowledge of ESQL, message flow design, and IBM MQ Proficiency in Java, XML/XSD, REST, and SOAP web services Mandatory prior experience delivering middleware/integration solutions within a bank or financial institution Experience with WebSphere and Linux/Unix environments Strong troubleshooting skills for production integration issues Nice to Have Experience with Apache Kafka or other event-streaming platforms Exposure to API Gateway/API Connect solutions IBM App Connect / Integration Bus certification Why Join Us Work on mission-critical integration systems for a leading Saudi banking client Be part of CodeNinja's forward-deployed engineering model, recognized among Clutch's 100 fastest-growing technology companies of 2026 Direct exposure to enterprise-scale banking infrastructure and Vision 2030-aligned digital transformation work Competitive contract terms with extension potential Disclaimer This job description is intended to convey information essential to understanding the scope of the role and is not exhaustive of all responsibilities, skills, or qualifications required. CodeNinja reserves the right to modify duties and responsibilities at any time.