Job Description

You can take an Interface Design Document, build the OIC integration end-to-end, handle the error cases the document did not cover, deploy it across environments, and hand over technical documentation that the support team can use a year later. That is the standard we build to.

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).

RAC is hiring an Interface Developer to build Oracle HCM integrations using Oracle Integration Cloud (OIC). You will develop, test, and deploy integration flows between Oracle HCM Cloud and third-party systems, working from functional Interface Design Documents and translating them into production-grade OIC implementations.

WHAT YOU WILL DO

• Build Oracle Integration Cloud flows from functional Interface Design Documents — implementing trigger, adapter connections, orchestration logic, data transformation, and error handling without requiring functional re-explanation of the business requirement
• Configure OIC adapters across the full HCM integration surface — Oracle HCM Cloud adapter for REST API calls, HDL-based operations, and Atom Feed subscriptions; REST and SOAP adapters for third-party systems; FTP adapter for SFTP file transfer; and database adapter for ATP persistence patterns
• Build XSLT data transformations — field mapping, conditional logic, array iteration for multi-record payloads, data type conversions, and null value handling
• Configure fault handling — scope-level fault handlers, global error handlers, retry policies, and alert notifications for failures that require human intervention
• Deploy integrations across environments — configuring environment-specific connection parameters, promoting via OIC Projects, deploying to Test/UAT/Prod, and validating post-deployment in each environment
• Perform unit testing and contribute to SIT — building test scenarios for happy path, error conditions, and edge cases, documenting results, and resolving defects to sign-off

WHY ROLLING ARRAYS

Every integration RAC builds goes to a live client environment with a real go-live dependency. You will develop OIC depth across the full Oracle HCM module integration surface in APAC legislative contexts, with a clear pathway to Senior Interface Developer and Integration Architecture roles.

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

Requirements

WHAT WE'RE LOOKING FOR

• 2–3 years of Oracle Integration Cloud (OIC) development experience on live implementation or AMS projects
• Hands-on experience building REST and SOAP integration flows in OIC — not training sandbox experience
• Practical XSLT mapping experience — can build multi-element transformations with conditional logic independently
• Experience configuring OIC fault handling and understanding the error hospital for reprocessing failed instances
• Ability to deploy integrations across environments and validate post-deployment without functional team support

PREFERRED QUALIFICATIONS

• Oracle Cloud Platform Application Integration 2025 Professional — the OIC certification; the primary target credential for an Interface Developer; at Consultant level this should be actively in progress or completed
• Oracle Fusion Cloud Applications HCM Process Essentials certified — the foundational HCM credential; understanding the HCM data model makes integration development significantly more effective
• Oracle ATP (Autonomous Transaction Processing) or ADW hands-on experience for integration persistence and parking lot patterns
• Java or Python scripting for payload pre-processing and transformation logic that OIC cannot handle natively

BUSINESS & CONSULTING SKILLS

• Technical documentation discipline — produces handover documentation that the support team can use 12 months after go-live without calling the SI
• Build-from-spec discipline — implements from the IDD without re-engaging the functional team for clarification; questions the spec before building, not during
• Deployment rigour — validates post-deployment in every environment before declaring a build complete
• Cross-functional collaboration — works alongside functional designers and client IT teams without creating communication gaps
• Fault handling ownership — does not declare an integration complete until error scenarios are handled, not just the happy path
• Learning agility — adapts to new adapter types, system APIs, and integration patterns across engagements without needing extended ramp-up

CAREER PROGRESSION

Consultant → Senior Consultant → Lead Consultant → Solution Architect → Practice Lead