• Configure Five9 VCC and IVA applications according to solution specifications from Solution Architects and Business Analysts, following established best practice guidelines. • Build and maintain inbound and outbound campaigns, queues, skills, routing profiles, dispositions, pacing, dialing logic, and related system settings. • Configure IVR/Studio IVA flows, including nested call paths, external variables, context tables, foreign scripts, and Studio based IVA logic. • Implement WFA, QM/WEM, AI Insights, Agent Assist, Guidance Cards, Knowledge, dashboards, reports, and Supervisor Desktop configurations. • Perform thorough configuration testing and validation prior to customer UAT or deployment. • Build, test, and troubleshoot connectors, REST/SOAP API integrations, data mappings, and webhooks for CRM/ITSM integrations including support for OAuth/SAML authentication flows, error handling and payload parsing. • Write and maintain JavaScript/HTML/CSS customizations (DOM manipulation, iframes, cookies, UI logic, and embedded components). • Configure CRM/ITSM integrations such as Salesforce, Dynamics, ServiceNow, Zendesk, NetSuite, and Velocify. • Troubleshoot issues across Five9 components and diagnose cross layer problems spanning application, browser, network/SIP/RTP/VoIP, and telecom. Perform log capture, scenario reproduction, and root cause analysis, collaborating with senior engineers/architects on complex issues. • Participate in client calls and technical working sessions, communicating progress, blockers, and status updates clearly to project managers and architects. • Document configuration decisions, integration logic, test cases, and operational details, and contribute to internal best practice libraries, reusable assets, and configuration templates.