Logo
Home Page

UnifiSign – Secure, Tokenized E-Signatures for Everyone

🔥 Inspiration

The growing demand for paperless documentation—especially in healthcare, legal, and organizational workflows—revealed that most e-signature platforms are either expensive, complex, or inflexible when it comes to custom consent workflows. We built UnifiSign to change that: a simple, secure, and customizable e-signature platform with tokenized public access, perfect for real-world use cases.

✅ What it does

UnifiSign enables users to create and send consent checklists, web forms, and PDF documents for signing—all securely accessible through tokenized links. Here's what it can do:

🔗 Tokenized Signing Links – Signers don’t need to log in. Each form or document is accessible via a secure, expiring link.
✅ Consent Checklists – Create custom forms with field types like text, checkbox, radio, signature, dropdown, and conditional visibility.
📄 PDF Document Signing – Upload PDF documents and place signature fields for completion.
📋 Web Forms for Signing – Custom-built HTML forms that support dynamic field logic.
📂 Dashboard – Users can track all signed items, preview them, and export or download results.
👥 User Roles – Supports SuperAdmin, Admin, User, and Guest access.
🔐 Authentication – Secure login using HttpOnly cookies and CSRF protection.
💳 Subscription Plans – Free, Pro, and Enterprise tiers (Payment integration pending).
🛠️ Custom Form Logic – Support for grouped fields and conditional visibility.

🧱 How we built it

Frontend: React + TailwindCSS (mobile-first responsive UI)
Backend: Custom PHP REST API using a lightweight routing framework
Database: MySQL – structured for user roles, documents, checklists, sign logs, and audit tracking
Authentication: Cookie-based login with SameSite=None and CSRF token validation
Signature Handling: SignaturePad-based drawing canvas, saved in vector or image format
Document Storage: Organized structure with access control and tokenized access
Deployment: Hosted on a Linux cloud server with Nginx + PHP-FPM
To be integrated: Stripe for plan upgrades and billing management

🚧 Challenges we ran into

Designing a modular checklist system with recursive nesting, conditional visibility, and dynamic field rendering.
Managing security for public signing links while ensuring traceability.
Implementing a cross-browser signature pad with accurate vector rendering.
Building a scalable permission system supporting four different user roles.
Ensuring the signing process is frictionless, especially for non-technical users accessing via mobile.

🏆 Accomplishments that we're proud of

Completed a fully working prototype with real-time checklist creation and public signing links.
Achieved a clean signer experience with no login or app installation required.
Developed a modular backend that can scale with future enterprise features.
Created a flexible drag-and-drop checklist builder that supports grouped fields and conditional logic.

📚 What we learned

Deep technical insights on building secure, tokenized systems for public access workflows.
The importance of user-centric UX in reducing drop-offs during signature flows.
How to balance flexibility with simplicity in dynamic form builders.
Practical knowledge of RESTful API architecture with secure authentication and authorization layers.

🚀 What's next for UnifiSign

💳 Stripe Integration for plan upgrades and pay-per-use signing
🧾 Audit Trail with signer IPs, timestamps, and digital fingerprinting
🤖 AI-Powered Checklist Suggestions based on template history
📱 Mobile App Companion for secure sign notifications and offline access
🔌 Embeddable Widget & API Access for B2B integrations

UnifiSign is designed to make e-signatures and consent forms accessible, flexible, and scalable—without compromising on security or user experience.