My Android application is already live on the Play Store, but it currently lacks a way to accept cryptocurrency. I need someone to wire in Cryptomus so users can make simple, one-time payments inside the app. Once Cryptomus confirms a transaction, the app must automatically send a confirmation email to the payer. Here’s how I picture the work: • Hook the existing checkout screen to the Cryptomus API, generating the correct wallet address and invoice for each order • Listen for the Cryptomus callback/webhook, verify payment status, and surface a clear success or failure state in the UI • Trigger our email service (we’re flexible on provider; SMTP, SendGrid, or another API is fine) immediately after a successful payment • Add basic error handling and logging so we can track failed or abandoned transactions • Provide brief instructions or code comments so future maintenance is straightforward Everything should be fully tested in sandbox and then pushed to production without disrupting the current release. If you’ve handled Android payment gateway integrations before—especially with crypto—this should be a quick, focused engagement.