Senior Enterprise Service Bus (ESB) Developer

Fulcrum Digital is an agile and next-generation digital accelerating company providing digital transformation and technology services right from ideation to implementation. These services have applicability across a variety of industries, including banking & financial services, insurance, retail, higher education, food, healthcare, and manufacturing.

About the role

Seeking an experienced IBM Integration Bus (IIB) / IBM App Connect Enterprise (ACE) Developer to design, build, and enhance enterprise-grade integration flows supporting policy administration and downstream booking systems. The ideal candidate will have hands-on experience with IBM MQ, IIB Compute Nodes (ESQL), XML/Flat-File transformations, and proven delivery experience in large-scale enterprise environments.

You will collaborate with architects, Duck Creek SMEs, QA teams, and downstream stakeholders to support a multi-phase core modernization program — enabling both legacy and modernized Duck Creek platforms to seamlessly integrate with WINS and future cloud-based platforms.

Key Responsibilities

· Design and develop IIB message flows to support Duck Creek booking and downstream systems

· Implement ESQL/XPath-based transformations, canonical models, and flat-file mapping logic

· Configure and manage MQInput, Compute, Filter, Mapping, and MQOutput nodes

· Build schema-aware routing and version-based processing for legacy & modern XML payloads

· Develop and maintain error handling, BOQ/DLQ processing, and replay capabilities

· Collaborate with enterprise architects to ensure adherence to integration patterns and standards

· Support integration testing, UAT, performance tuning, and production rollout activities

· Create and maintain technical documentation, mapping specs, and deployment artifacts

· Troubleshoot MQ/IIB flows in lower and production environments

· Contribute to CI/CD pipelines and automation for integration solutions

Required Skills & Experience

· 5+ years hands-on experience with IBM Integration Bus

· Strong ESQL, XML, XPath, XSD and SOAP/REST experience

· Proven expertise in IBM MQ (queues, topics, channels, BOQ/DLQ handling)

· Experience with flat-file and fixed-length transformations (DFDL/ESQL)

· Proficiency in message versioning, schema validation, and routing logic

· Experience working with integration patterns, middleware, and ESB architectures

· Hands-on debugging, performance tuning, and root cause analysis skills

· Familiarity with Git and CI/CD tools (Jenkins/Azure DevOps/Bamboo)

· Strong communication and technical documentation capabilities

Certifications (Nice-to-Have)

· IBM Certified Solution Developer – Integration Bus or ACE

· Cloud certifications (AWS / Azure)