_03. Case Study
QuickInvoice
QuickInvoice lets freelancers create, customise, and export PDF invoices without a complex accounting setup. You fill in client details, add line items, and the app calculates totals, VAT, and due dates. Built with Next.js, jsPDF for export, and Node.js for email delivery.
Full Stack
The Problem
As a freelancer I was manually typing up invoices in Google Docs and converting to PDF. It was slow, inconsistent, and looked unprofessional.
The Solution
Built a form-based invoice creator with real-time preview, automatic total/tax calculation, PDF export, and optional email-to-client. Branding stays consistent every time.
The Result
Cut invoice creation time from 15 minutes to under 2. Started sending more consistent, professional invoices which improved payment turnaround.
Impact Metrics
Invoice time: 15min → 2min · Used for all freelance billing
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