I run a small, service-based company and I’m ready to replace spreadsheets with a dedicated billing system. The core of the job is to build (or configure) lightweight software that lets up to five users create, send, and track invoices effortlessly. Essential requirement • Multi-payment options are non-negotiable—I need to offer clients everything from card payments to bank transfer or UPI without jumping between apps. What I expect – Clean, intuitive interface that works on desktop (web-based or installable, I’m open). – Quick setup of client profiles, service items, taxes or discounts. – Automatic invoice numbering and PDF generation. – Dashboard or simple reports so I can see paid, pending, and overdue invoices at a glance. – Secure user roles for 1–5 simultaneous users. – A brief hand-off guide or short video so my team can be up and running within a day. If you have an existing framework that matches these needs, great—just be ready to customize branding and payment flows. If you prefer building from scratch in something like Laravel, Django, or Node, tell me how you’ll keep it lean and maintainable. When you respond, outline: 1. Your recommended tech stack or off-the-shelf platform. 2. How you’ll integrate the multi-payment gateway(s) of your choice. 3. Estimated timeline to first working demo and to final delivery. Ready to get this live and start invoicing smarter.