About the Role: We are seeking a skilled Mule Developer to join our Check Challenge Appeal (CCA) development team. We are a dedicated, friendly team made up of product roles and technical developers/testers delivering in an Agile manner to passionate and interested customers on behalf of the Value Office Agency (VOA). The ideal future colleague will be part of a Team of Developers/Testers responsible for our upgrade to Mule 4.4 Responsibilities: The Mule developer will be responsible for the following tasks: Upgrade of APIs: Rebuild existing Mule 3.x APIs in Mule 4.4 adhering to updated best practice specifications. Development of New APIs: Build other required APIs in Mule 4.4 to best practice specifications as directed. Testing and Validation: Collaborate with testers to ensure APIs meet functional, non-functional, and performance criteria. Debug, resolve issues, and conduct regression testing as necessary. Collaboration with Team: Work closely within the wider team of CCA developers and testers to ensure consistency and quality in deliverables. Documentation: Document processes, updates, and lessons learned to provide a reference for future upgrades. Deliverables: Upgraded/enhanced CCA APIs compatible with Mule 4.4. Comprehensive testing results and documentation. Deployment-ready APIs ensuring smooth production transition. Technical documentation for the APIs rebuilt/enhanced during the work. Ongoing/Continuous Improvement: Identify opportunities for process and code improvements within the production environment. Proactively engage in troubleshooting, optimising, and scaling backend services to support growing business needs. Performance Metrics: Successful migration of all identified Mule 3.x APIs to 4.4. Development and deployment of new APIs within defined timelines. Zero critical defects in production post-deployment. Positive feedback from stakeholders and users regarding the upgraded APIs. Technologies: Mule ESB (Enterprise Service Bus) - Key integration platform for managing and orchestrating service connectivity and data flows between applications. Mule Anypoint Studio - Primary development environment for designing and debugging Mule ESB flows. RabbitMQ - messaging bus that facilitates communication between different services/components in the system by reliably queuing, routing, and delivering messages. Java - Core language for backend services, necessary for writing, maintaining, and troubleshooting applications that integrate with Mule ESB. MySQL Database - Database management and querying, essential for accessing, updating, and managing application data. Elastic Stack (Elasticsearch, Kibana) - Primarily used for monitoring and log analysis; leveraging this stack to diagnose production issues, track service performance, and support troubleshooting. Bamboo CI/CD - Continuous integration and deployment tool for automating builds, testing, and deployments in both dev and production environments. Stash (Git) - Version control for managing and tracking code changes, supporting collaboration across the development team. Jira - Issue and project tracking tool, used to coordinate production support requests, development tasks, and release management. Qualifications: Bachelors degree in Computer Science, Engineering, or a related field, or equivalent experience. 3 years of Mule: confident understanding of MuleSofts Anypoint Platform, including API development, integration patterns and Mule 4 architecture. Upgrading knowledge: Experience upgrading from Mule x to Mule 4.4 including migration of code, connectors, and dependencies Connector Upgrades: Familiarity with updating legacy connectors to Mule 4 compatible versions building bespoke or migrating to new connectors. Proficiency in backend programming languages such as Java, Python, Node.js, or similar. Familiarity with production environments and CI/CD pipelines. Experience with service monitoring, debugging, and troubleshooting tools. Ability to work collaboratively in a fast-paced environment, balancing multiple priorities.