Invoice Module for Time Tracker

Project Title:
Develop Invoice Extension / Module for Existing Time Registration System

Project Description:
I have an existing time registration / time tracking system and I need an experienced developer to build a complete invoice generation extension for it.
About the Project
The current system is used to track time spent on projects and clients. I want to add seamless invoicing functionality so that billable time can be turned into professional invoices quickly and accurately.
Key Requirements / Features

Pull and filter time entries by client, project, date range, employee, etc.
Automatic calculation of invoice totals based on hourly rates, fixed prices, or project budgets.
Professional, customizable PDF invoice generation (company logo, tax/VAT rates, payment terms, notes, etc.).
Automated invoice numbering and status tracking (Draft, Sent, Paid, Overdue, Partially Paid).
Option to email invoices directly from the system.
Basic invoice dashboard and reporting.

Nice-to-have (optional):

Integration with payment gateways (Stripe, PayPal, etc.)
Export to accounting software (QuickBooks, Xero, etc.)
Multi-currency and multi-language support

Skills & Experience Required

Proven experience building invoicing or billing modules
Strong full-stack development skills (the exact tech stack of the current system will be shared with serious applicants)
Experience integrating new features into existing applications
Clean, well-documented code and good attention to UI/UX

What to include in your proposal

Links to relevant past projects (especially time tracking or invoicing systems)
Your proposed technical approach
Estimated timeline and cost
Any questions you have about the project

I will provide full technical details (database schema, current code access, screenshots, API documentation, etc.) to qualified freelancers after I review proposals.
Looking forward to your bids and building this extension together!

How to use this on Freelancer.com:

Copy the Project Title and Project Description exactly as shown.
In the “Skills” section, add relevant tags such as: Full Stack Development, Invoicing System, Time Tracking, PDF Generation, API Integration, Database Integration (add your specific tech stack if you know it, e.g. PHP, Laravel, Node.js, React, MySQL, etc.).
Set your budget and timeline according to what you’re comfortable with (most similar projects fall in the $500–$2,500 range depending on complexity).

Just paste it in and you’re ready to go! If you want any changes (add specific features, your tech stack, budget preference, etc.), let me know and I’ll update it instantly. Show More