Workday System Integration Engineer

• Our client is seeking a Senior hands-on Integration Engineer with deep Workday expertise and strong system-agnostic integration and software engineering fundamentals.
• This role is responsible for designing, building, and troubleshooting API-driven integrations between Workday and enterprise platforms. Workday serves as the system of record, while Microsoft Power Automate and other tools act as orchestration and execution layers.
• The ideal candidate possesses a deep mastery of Workday APIs, data structures, and business processes, complemented by a robust background in platform-agnostic integration architecture and engineering principles.

Responsibilities

Design and implement Workday integrations using:

• Workday REST APIs
• Workday SOAP APIs (Web Services)
• Workday data model and business process logic

Construct and troubleshoot:

• XML payloads and API requests
• API responses and error handling
• Authentication, security, and integration context

Build integrations that follow sound engineering principles:

• Explicit validation prior to write-back
• Deterministic execution and predictable outcomes
• Robust error handling and retry strategies
• Full observability including logging and audit trails

Diagnose integration issues by analyzing:

• Raw API request and response data
• Workday Business Process state and configuration
• Data integrity and sequencing issues across systems

Partner with engineering teams to support orchestration patterns using tools such as:

• Power Automate
• API layers
• Workflow and automation platforms

Ensure integrations respect system boundaries:

• Workday enforces business rules and approval flows
• External systems orchestrate, not override system-of-record logic.

• 4+ years of hands-on experience in Workday integration.
• Must demonstrate hands-on workday API experience and integration engineering depth.
• Strong proficiency in Workday SOAP APIs (Web Services), Workday REST APIs, and a deep understanding of the Workday data model and object relationships.
• Solid understanding of Workday Business Process-controlled API behavior and the ability to construct API requests manually.
• Proven ability to troubleshoot failures at the request/response level and debug integrations without relying on Studio abstraction layers.
• Strong understanding of XML structure, namespaces, and schema validation.
• Comprehensive knowledge of integration security (ISU, ISSG), authentication, and API connectivity patterns.
• Demonstrated ability to design integrations that are deterministic, resilient, observable, and auditable.
• Strong understanding of core integration patterns, including API-driven architecture, request/response vs. event-driven models, and orchestration vs. system-of-record responsibility.
• Ability to define validation layers before system updates and design safe retry strategies that prevent data duplication or corruption.
• Proficiency in isolating failures across multi-system workflows and experience working across multiple platforms beyond Workday.
• Strong analytical mindset with the ability to demonstrate software engineering fundamentals and solve complex integration challenges.