Oracle Interface Designer - Consultant

A functional Interface Designer produces the specification that determines whether an integration works the first time or goes through five defect cycles. If your Interface Design Documents are precise enough that a developer can build from them without a single clarifying question, and your integration test cases catch edge cases before UAT, this is your workstream.

ABOUT ROLLING ARRAYS

Rolling Arrays is a private equity-backed, award-winning HR Tech consulting firm — Asia Pacific's premium partner for enterprise HR digital transformation. Headquartered in Singapore and with offices across India, Malaysia, Australia, and Hong Kong, we have delivered more than 200 HR Transformation projects since our founding in 2009, and were recognised as one of Singapore's Top 100 fastest-growing companies in 2025. We specialise in SAP SuccessFactors, Oracle HCM, and Workday across the full delivery spectrum: HR process design and consulting (ALIGN), technology implementation (AUTOMATE), change management and adoption (ADOPT), and managed support services (AMS).

POSITION SUMMARY

RAC is hiring a Functional Interface Designer to produce integration design documentation for Oracle HCM implementations. This is a functional — not a developer — role. You will map HR data flows between Oracle HCM and third-party systems, produce Interface Design Documents, support integration testing, and maintain the interface inventory for your assigned engagement.

WHAT YOU WILL DO

• Elicit integration requirements from client HR and IT stakeholders — running interface workshops that go beyond what data flows where to capture trigger, frequency, error ownership, rejection handling, and the business consequence of a delayed or failed interface
• Produce complete Interface Design Documents for every in-scope integration — covering source and target systems, trigger, direction, frequency, field-level mapping with transformation rules and code conversions, error handling approach, volume estimates, and the reconciliation method
• Map Oracle HCM data objects to target system fields — knowing what is available via REST API, HCM Extract, and SOAP service respectively, and flagging mapping gaps where Oracle does not hold the attribute the target system needs
• Validate built integrations against IDD specifications — working with OIC developers to confirm the build matches the design, raising formal defects with evidence when it does not, and documenting approved deviations
• Prepare and execute integration test cases — positive, negative, and volume scenarios — and drive defects to resolution

WHY ROLLING ARRAYS

Interface design is a delivery-critical workstream at RAC — not a task assigned to a developer with a functional note attached. You will build a rare functional-integration skill set across Oracle HCM's full suite of integration patterns, with a clear pathway to Senior Interface Designer and Integration Workstream Lead.

OUR CULTURE CODE

Six values define how we operate every day at Rolling Arrays:

• Thinking Smart — spot patterns, chase smarter solutions, and illuminate the path to greater productivity
• Never Stop Learning — refine and elevate skills constantly; explore the world with a curiosity lens
• Being Nice to Everyone — treat everyone with genuine warmth and respect, regardless of seniority
• Be Super Patient with Customers — exercise patience and proactivity in every client interaction
• Help Your Teammates — share the load, lighten the stress, nurture a truly collaborative team
• Acknowledge Your Mistakes — embrace mistakes as steppingstones; grow from each one