I’m rolling out a new payment gateway that connects directly to our partner bank, HDFC. I need a developer who can: • Integrate HDFC’s payment and payout APIs into our platform, handling tokenisation, refunds, and settlement callbacks. • Build the business-client onboarding flow—specifically the Business Profile Setup screen and its underlying data model—so new merchants can start transacting in minutes. • Ensure the solution is PCI-DSS compliant, supports webhooks, and exposes clear REST endpoints for future mobile apps. • Produce concise technical documentation and run end-to-end sandbox tests with sample pay-in / pay-out scenarios. If you’ve connected to Indian bank APIs before and can deliver a clean, well-documented codebase, let’s talk.