I implement and repair the integrations that make production web products operate reliably: third-party APIs, authentication and session flows, payment systems, dashboards, webhooks, and production data-processing paths. Deliverables can include: • Integration and dependency review • API request/response implementation • Validation and error handling • Authentication/session fixes • Payment and webhook integration • Database and data-flow work • Production verification • Deployment and handoff notes Focused integration or production fixes typically take 3–7 business days after scope confirmation. Multi-system integration typically takes 1–3 weeks depending on providers, environments, and testing requirements.