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DocuSigner SaaS

Legally compliant e-signature SaaS platform, document signer workflows, and cryptographic audit logs.

89.00 €

/ One-time payment • Full Source Code & Lifetime License

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Tech Stack: PHP Laravel PDFtk / FPDI MySQL WebSockets

✦ Overview & System Architecture

DS PROD CERTIFIED

✦ 1. Executive System Overview & Purpose

DocuSigner SaaS is a secure electronic signature, contract management, and document workflow SaaS platform. Engineered for legal teams, real estate brokerages, HR departments, and sales organizations, it enables businesses to upload PDF agreements, place interactive signature and initial fields, and execute legally binding agreements in minutes.

Featuring multi-party signing order sequences, biometric signature pads, tamper-evident SHA-256 cryptographic audit trail certificates, automated email reminders, and downloadable completed PDFs, DocuSigner SaaS delivers an enterprise alternative to DocuSign and Adobe Sign.

⚡ Document Signing & Contract Studio Features

✅ Interactive PDF Drag-and-Drop Tag Placement

↳ Place Signature, Initials, Full Name, Email, Date Signed, and Custom Text Fields

↳ Checkbox and Dropdown Selection Fields for Signer Choices

↳ Color-Coded Signer Tags with Assigned Signer Mapping

✅ Flexible Signing Methods & Accessibility

↳ Draw Signature on Touchscreen Tablet/Smartphone, Type Signature, or Upload Signature Image

↳ Zero Account Creation Required for Signers (Instant Access via Secure Email Link)

↳ One-Time Passcode (OTP) SMS Signer Verification Option for High-Value Contracts

✅ Multi-Party Signing Workflows & Sequence Order

↳ Set Sequential Signing Order (Signer A Must Sign Before Signer B Receives Document)

↳ Parallel Signing Mode (All Signers Can Sign Concurrently)

↳ CC Inactive Stakeholders for Automatic Final Copy Notification

✅ Cryptographic Audit Trail Certificate

↳ Tamper-Evident Completion Certificate Appended to Completed PDF

↳ Records Signer IP Address, Browser User-Agent, Email Verification, and Timestamp

↳ SHA-256 Document Hash Verification to Prove Integrity

⚡ SaaS Governance & Compliance Features

✅ Envelope Quotas & Subscription Tiers

↳ Monthly Envelope Limits (e.g., Starter: 10 Envelopes, Business: 100 Envelopes, Unlimited)

↳ Automated Document Retention Policies and Secure S3 Storage Archival

↳ Automated Invoicing via Stripe, PayPal, and Card Gateways

✦ 2. Operational Workflows

⚡ Admin Workflow

▸ Configure platform email SMTP branding, digital signature legal disclaimers, and plans

▸ Activate recurring payment processors for envelope subscription plans

▸ Monitor encrypted document storage health and system audit logs

▸ Manage registered organization accounts and track contract volume growth

▸ Maintain compliance with electronic signature legal standards (eIDAS, ESIGN)

⚡ User Workflow

▸ User uploads agreement in PDF format and adds recipient signer details

▸ Drags signature, initials, and date fields onto desired document pages

▸ Sends document out for signature; system emails secure access links to recipients

▸ Signers sign on phone, tablet, or PC; system sends automated reminder to pending parties

▸ All parties receive tamper-evident completed PDF with cryptographic audit certificate

✦ 3. Server Requirements & Technical Specifications:

Built with PHP 8.2+ & Laravel 11.x Digital Signature Engine

✓ BCMath

✓ Ctype

✓ cURL

✓ DOM

✓ Fileinfo

✓ Filter

✓ Hash

✓ JSON

✓ Mbstring

✓ OpenSSL

✓ PCRE

✓ PDO

✓ PDO_MySQL

✓ Tokenizer

✓ XML

✓ Zip

✓ GD / Imagick

⚙️ Technical Architecture Blueprint & Microservice Flow

High-Resolution Blueprint

This blueprint illustrates the end-to-end request lifecycle: Cloudflare edge ingress, Nginx SSL termination, application MVC dispatch, asynchronous Redis queue workers, and encrypted relational persistence.