Cross-Platform HR Payroll Suite

I need a cloud-hosted HR & payroll platform that runs smoothly on the web and ships with companion Android and iOS apps. Core features must cover employee management, fully-automated payroll processing, and robust leave & attendance tracking.

Please wire the system to recognised time-tracking tools and add geo-tagging so clock-ins can be verified by location. Clean, modular APIs are essential because I want the option to plug in further integrations—accounting or additional HR systems—in future releases.

Deliverables
• Responsive web application with admin panel
• Native or cross-platform Android and iOS apps sharing the same back-end
• Secure database schema, role-based access control, and audit logs
• Payroll engine configured for multiple pay periods, deductions, and statutory compliance
• Real-time leave and attendance dashboard fed by time-tracking/geo data
• REST/GraphQL documentation and deployment scripts for staging and production
• Source code, unit tests, and brief user manual

The build should be performance-oriented, easy to maintain, and packaged for straightforward cloud deployment (AWS, Azure, or similar). Let me know your preferred tech stack, estimated timeline, and how you plan to tackle the geo-tagging and third-party time tracker linkage.