Senior FinTech Full-Stack Developer for Confidential Mobile & Web Platform

I am looking for an experienced full-stack developer to help build an MVP for a private financial technology platform. The product concept, business model, detailed workflows, and UI/UX have already been developed. Figma designs and detailed product requirements will be provided to the selected developer after appropriate confidentiality arrangements are in place. This is not a project where I need someone to invent the product from scratch. I am looking for a developer who can take an established design and product specification and turn it into a secure, scalable, production-quality mobile application and supporting backend. The application will involve user accounts, authentication, user profiles, dashboards, private groups, member management, scheduled transactions, payment-related workflows, notifications, activity/history tracking, administrative controls, and other financial technology functionality. The developer should be comfortable building systems involving sensitive financial information and should understand security, authentication, database architecture, APIs, payment/banking integrations, transaction records, permissions, error handling, and audit trails. Experience with fintech, banking APIs, payment platforms, Plaid, Stripe, Dwolla or similar financial infrastructure is strongly preferred. Experience developing iOS/Android applications using React Native or Flutter is also preferred. The existing Figma design should be followed closely. I want the finished application to maintain the visual identity, simplicity, navigation, and user experience established in the designs rather than having the UI redesigned from scratch. The project will be developed in milestones, beginning with the core MVP. Additional functionality can be added progressively after the initial foundation is working correctly. I am interested in establishing a longer-term relationship with the right developer as the platform grows. Because this is a proprietary startup currently under development, the public job description intentionally does not disclose the complete business model or proprietary workflows. Shortlisted candidates will receive additional information after confidentiality protections are established. When applying, please include examples of mobile applications or fintech/payment-related systems you have personally developed, your preferred technology stack, your experience integrating financial APIs, and a brief explanation of how you normally structure an MVP from Figma designs. Please begin your proposal with the words “FINTECH MVP” so I know you read the entire description. I value clear communication, clean code, documentation, security, reliability, and developers who can explain technical decisions in straightforward language. All source code, design implementation, databases, documentation, credentials, and other work product created for this project must be delivered to and controlled by the client.