Role: Senior Mulesoft Enterprise Integration Engineer Location: Irvine, CA (5 Days a Week Onsite) Duration: 6 Months Contract (Can be Extended) About the Opportunity Our client, a well-established enterprise organization, is adding a Senior Enterprise Integration Engineer to its technology team. This is a hands-on build role for an engineer who is strongest with MuleSoft and modern API development. You will own integrations end to end: designing new connections between systems, improving the ones already in place, and resolving issues when data stops flowing. The work spans many applications and partner teams across a broad technology landscape. Key Responsibilities Build, test, release, and support integration solutions on the MuleSoft platform. Create and maintain APIs and web services that let applications share data reliably. Turn business and technical needs into integration designs that scale. Diagnose and resolve integration problems across development, QA, and production. Contribute to automated build, deployment, and release pipelines. Partner with development, architecture, infrastructure, and other IT groups. Strengthen the security, performance, stability, and maintainability of existing integrations. Review peers' code and help shape engineering standards and best practices. Keep clear documentation for integrations, APIs, and related processes. Qualifications Proven, hands-on background building and supporting enterprise integrations. Direct experience with MuleSoft Anypoint Platform, CloudHub, or both. Solid command of REST and SOAP APIs, web services, and common integration patterns. Comfort working with JSON, XML, and related data and API standards. Working knowledge of microservices and current application architecture approaches. Exposure to messaging, asynchronous processing, or event-driven designs. Coding skills in Java, Python, JavaScript, or a comparable language. Practical use of Git, CI/CD pipelines, and automated deployments. Sharp troubleshooting and analytical problem-solving ability. Background in large, multi-system enterprise IT environments. Clear communicator who works well with both technical and business stakeholders.

Established in 2004, 3Core System is a certified small minority owned business providing ERP Systems Integration, AMS, IT Consulting and Staff Augmentation Services to Fortune 1000, SMB, and State, Local and Education (SLED) customers. While our System Integration services help organizations achieve digital and cloud transformation objectives, AMS Services help increase the availability of critical services of end user applications. On the other hand, our IT Consulting Services would provide subject matter experts to help you assist with specific project needs and the Staff Augmentation services help you balance workload and achieve budget parameters.
>ERP System Integration Services: 3Core Systems is an SAP Silver Partner and authorized service provider offering technical architecture, application design and configuration, integration, testing, data migration and solution adoption services for solutions including SAP SuccessFactors, SAP HCM On-Premises and SAP Business Intelligence
>Application Management Services (AMS): We offer post go-live, System Health Check and Optimization, Function Enhancements, Integration Monitoring, Release, and patch services. Our AMS services span across SAP Solutions including ERP (S/4 HANA), Financial Management, Human Capital Management, Data and Analytics, Supply Chain, CRM, and Customer Experince.
>IT Consulting and Staffing Augmentation Services: Ever since its inception, 3Core Systems has been offering IT Consulting and Staff Augmentation solutions including temporary, long-term, project based and contract staffing services that could be personalized based on your needs. Our staffing services span across emerging technologies and legacy solutions including but not limited to Artificial Intelligence, Machine Learning, Data Science, Cloud, ERP, CRM, BI/BW/ETL, Database, Web & E-Commerce, UI/UX, Network & Security and Mobile.