I’m building a revenue-focused Android app and need a developer who can take it from concept to a polished release on Google Play. The core requirement is a seamless, secure payment option—think in-app purchases or a checkout flow tied to a trusted gateway. Other bells and whistles such as push notifications or social media hooks are not on the roadmap right now, so your energy can stay squarely on clean architecture, smooth UX, and bullet-proof payment handling. You’ll guide the end-to-end process: set up the project in Android Studio, wire up the payment SDK or API of choice, and make sure transactions are processed, verified, and logged reliably. I’ll supply branding assets and any copy; you deliver an installable APK (or AAB), full source code, and a quick README so future maintenance is painless. Acceptance will be straightforward: • App installs and runs on current Android versions without crashes • Payment flow completes with sandbox and live credentials • Transaction success and failure states are clearly handled and displayed • Codebase is handed over in a well-organized repo If you’ve shipped Android apps with payment integration before, let’s talk and start turning this idea into real profit.