Tax Client Intake Backend Development

IMPORTANT: Do not search for me on LinkedIn, social media, or anywhere else. Do not try to contact me outside this platform. I will immediately reject and block you. I need a robust backend that powers an end-to-end intake workflow for my tax preparation firm... (Budget: $3000 - $5000 USD, Jobs: API Development, Backend Development, Claude (Anthropic), Database Development, Google Cloud Platform, Node.js, OAuth, Python, REST API, Stripe)