Senior Oracle Interface Designer - Lead Integration & UAT

ROLLING ARRAYS CONSULTING PTE.LTD.; Singapore; On-site; SGD 120,000 - 160,000; Full time

Job summary

Rolling Arrays is a Singapore-based HR Tech consulting firm seeking a Senior Functional Interface Designer to lead the integration design workstream on Oracle HCM implementations.

You will own the end-to-end interface catalogue—from requirements elicitation and IDD production through developer handoff, testing, and UAT sign-off—acting as the functional integration authority for the delivery team and the primary interface contact for the client's IT architecture team.

Qualifications

• 4–5 years of Oracle HCM experience with proven interface design workstream ownership on at least two implementations through to UAT sign-off.
• Experience owning and managing an interface catalogue of 10+ integrations on a single engagement.
• Demonstrated developer QA experience — has reviewed built integrations against specifications, raised formal defects, and managed rework to sign-off.
• Ability to manage third-party system teams and escalate through the project governance structure when external dependencies are blocking progress.
• Ability to present integration workstream status, risk, and readiness to client IT Directors and project leadership.

Responsibilities

• Own the integration catalogue from day one — producing the full interface inventory within the first two weeks of design phase, classifying each interface by pattern, direction, criticality, and third-party owner, and maintaining it as the single source of truth throughout the project
• Lead integration requirements workshops — extracting trigger conditions, error handling expectations, SLA requirements, and business consequence of failure, and producing workshop outputs that flow directly into IDD authoring
• Produce and own all Interface Design Documents — at a level of precision that an OIC developer can build from without functional re-engagement, with a client IT sign-off process before development begins
• Drive interface prioritisation and phasing — recommending development sequence based on go-live criticality, third-party readiness, and data migration dependencies, and escalating when a third-party team is blocking sign-off
• Review and approve OIC developer builds against IDD specifications — logging formal defects with reference to specific IDD fields and distinguishing design deviations from legitimate technical implementation decisions
• Own integration UAT — designing the test plan, coordinating third-party test environment availability, and driving defect resolution to formal sign-off

Skills

IT architecture credibility

Third-party system management

Integration risk communication

IDD governance

Workstream leadership

Developer quality review

Job description

Rolling Arrays is a Singapore-based HR Tech consulting firm seeking a Senior Functional Interface Designer to lead the integration design workstream on Oracle HCM implementations.

You will own the end-to-end interface catalogue—from requirements elicitation and IDD production through developer handoff, testing, and UAT sign-off—acting as the functional integration authority for the delivery team and the primary interface contact for the client's IT architecture team.