Senior Oracle HCM / ADP Payroll Integration Consultant (Freelance, Europe)

We are supporting a global payroll outsourcing initiative and are looking for an experienced Senior Oracle HCM / ADP Payroll Integration Consultant with strong technical integration expertise. The project focuses on integrating Oracle HCM Cloud with ADP as the global payroll provider. The consultant will support the client in adapting available Oracle HCM standard connectors for ADP, addressing local country-specific payroll requirements, and designing or implementing custom integrations where required. The project involves a tight timeline, multiple country implementations running in parallel, and close coordination between global HR, payroll, IT, local country teams, and ADP. Important: We are looking for candidates based in the DACH region or Nearshore Europe , ideally with a working time zone close to CET/CEST. Offshore delivery locations outside Europe are not in scope for this assignment. Framework Conditions Start: 18.05.2026 Duration: At least until end of Q1 2027, with quarterly assignment and capacity review possible Capacity: Full-time expected, especially during the initial project phase Location: Remote, with possible participation in selected onsite workshops Language: English Level: Senior Contract Type: Freelance Tasks Act as Senior Technical Integration Consultant for a global Oracle HCM to ADP payroll outsourcing project Support the project from kick-off through implementation, rollout, testing, and hypercare Analyze, assess, and adapt available Oracle HCM standard connectors for ADP, especially in relation to local country-specific payroll requirements Support integration scenarios for ADP GlobalView and/or ADP Celergo , depending on project scope and country rollout Design and implement custom integrations between Oracle HCM Cloud and ADP where standard connectors are not sufficient Define and validate payroll-relevant data mappings between Oracle HCM and ADP Work with Oracle HCM Extracts, HDL, BI Publisher, APIs, OIC or comparable middleware/integration technologies Coordinate technical interface requirements with ADP, internal IT, HR, payroll, and local country stakeholders Support multiple country implementations and rollouts running in parallel Prepare and facilitate technical integration workshops Support SIT, UAT, payroll parallel runs, defect resolution, and cutover activities Analyze interface errors, data quality issues, and payroll integration defects Create and maintain technical documentation, interface specifications, mapping documents, and handover materials Support knowledge transfer to the internal client team Requirements Several years of experience as a technical consultant in Oracle HCM Cloud environments Proven hands-on experience with Oracle HCM integrations, ideally in global payroll transformation or payroll outsourcing projects Strong experience with integrations between Oracle HCM and external payroll providers Ideally previous project experience with ADP GlobalView , ADP Celergo , or other ADP payroll solutions Good understanding of payroll-relevant HR master data, compensation data, organizational data, employee lifecycle events, and country-specific payroll requirements Experience with Oracle HCM integration technologies such as: HCM Extracts, HDL / HSDL, BI Publisher, REST / SOAP APIs, Oracle Integration Cloud / OIC File-based and middleware-based interface architectures Ability to translate global and local payroll requirements into scalable integration designs Experience in complex international rollout environments with multiple countries running in parallel Strong analytical skills in data mapping, interface design, defect analysis, and issue resolution Experience working with external payroll providers, implementation partners, and distributed global teams Senior stakeholder management skills across HR, payroll, IT, vendors, and local country organizations Hands-on, structured, and delivery-oriented working style Ability to work independently in a fast-paced project environment with tight timelines Fluent English, spoken and written