Full-stack developer for UK tax and VAT software MVP

I'm looking for a full-stack developer to build the MVP of a secure web-based workflow platform for UK accounting professionals. The application will manage client records,automate data processing,generate calculation from imported financial data and integrate with UK government APIs for submission workflows. The MVP requires: - Secures login and user permission - Client management dashboard - Data import from external software via APIs or file uploads -Calculation engine based on UK tax/VAT rules -Government API integration -Reporting,audit history and status tracking I'm looking for someone with experience building SaaS platforms,API integrations, and scalable web application.Full project will be shared with shortlisted candidates.