Senior Full Stack SaaS Developer / AWS Architect for Leave Management Platform

We have built a functional demo/prototype of a Leave of Absence Case Management Portal in Replit and are looking for an experienced SaaS developer to help us productionize and deploy it on AWS. The platform is designed for employers to manage employee leave requests, documentation, approvals, and case workflows. Current prototype includes: • Employee leave intake portal • Manager and HR dashboards • File upload capabilities • Leave status tracking • Intermittent leave reporting • Extensions and renewals • Employee data feed integration (HRIS file feeds) • Role-based workflows We need someone to: • Review the current Replit codebase and deployment files • Assess architecture for scalability and security • Rebuild/refactor where necessary for production readiness • Deploy to AWS (best architecture recommendations welcomed) • Set up authentication and user roles • Secure document storage • Configure database structure • Build audit trail/logging • Implement API integrations for HRIS file imports • Establish CI/CD pipeline • Advise on SaaS multi-tenant architecture for future clients Ideal experience: • SaaS application architecture • AWS (Lambda, RDS, S3, Cognito, API Gateway, ECS, or similar) • HIPAA/SOC2 compliant architecture preferred • Secure file handling/document storage • Workflow/case management systems • HR tech or leave management experience is a plus Please include examples of similar SaaS platforms you have built and explain your approach to taking a prototype to production.