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Web & HTML Email Developer
SaaS Founder / Solo Developer

Full-stack developer who builds web applications and email systems. Built MintyEmailTester.com a production SaaS serving 350+ developers. Built a workers' compensation EHR system (Demo). Specializes in Python/Flask, and HTML email development. Former Orthopedic technician with 13 years in clinical healthcare.

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David Gutierrez
Full-Stack Web Developer
Los Angeles, CA

About

Web and email developer who built MintyEmailTester, a production SaaS serving 350+ users with Stripe subscriptions. Specializes in Python/Flask, JavaScript, PostgreSQL, and hand-coded HTML email development. 13 years in healthcare provides strong attention to detail and understanding of compliance requirements.

Key Skills

  • HTML / CSS
  • Responsive Web Design
  • JavaScript
  • Responsive Email Design
  • Python/Flask Development
  • Hand-coded HTML/CSS Email Templates
  • PostgreSQL/Databases
  • Cross-Client Testing (Minty)
  • Version Control (Git)
  • Email Accessibility Standards
  • Authentication & Payments
  • Klaviyo Platform Experience
  • API Integration
  • CAN-SPAM
  • WordPress
  • Healthcare Applications

Tech Stack

HTML5 icon
HTML
CSS3 icon
CSS
CSS3 icon
javascript
CSS3 icon
Python
Flask
Flask
Figma icon
Figma
Klaviyo email platform icon
Klaviyo

Electronic Health Records

Minty Email

Electronic Medical Records

Workers Compensation Project

Workers' compensation electronic health record system featuring comprehensive clinical workflow management. Includes provider portal, medical history tracking (allergies, medications, conditions, surgeries), ICD-10 and CPT code integration, imaging/lab results management, progress notes (PR1/PR2), operative reports, and request for authorization (RFA) processing. Built with modular Flask architecture using blueprints for scalability. Full-stack application: Python/Flask backend, PostgreSQL database (SQLite local fallback), Flask-Login authentication with 30-minute sessions. Demonstrates healthcare application architecture, HIPAA-aware security practices, complex medical forms, multi-role access control, and clinical documentation workflows. Deployed on Render with environment-based configuration.

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SaaS

Minty Email

HTML Email Tools

MintyEmailTester.com

I created this as an alternative to Litmus Putsmail with added tools and features. Full-stack email testing SaaS built with Python Flask, JavaScript, and responsive HTML/CSS. Helps email developers test HTML Email code by sending code to real emails. Features saved email groups automated CSS inlining, accessibility checks, and CSV link merging for efficient workflow management. Features: Saved recipient groups, file size validation, browser preview, Stripe subscription management, Postmark SMTP delivery. Tech: Flask, PostgreSQL, JavaScript, user authentication, deployed on DigitalOcean with SSL. Serving paying customers ($9/month) with active usage from email development community.

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Event Tracking

Minty Email

JavaScript Tag Demo

With Google Tag Manager

Built a demo site to demonstrate JavaScript event tracking with GTM. Tracks button clicks and link clicks using dataLayer.push(). Includes intentional bugs (typos, undefined variables, missing event names) to demonstrate debugging common tracking failures.

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HTML EMAIL PROJECTS

Each project is a unique piece of development

Bike shop promotional email template preview

Promotional Email 🎣

Fishing Gear

Promotional email for Piscifun showcasing a limited-time offer on fishing gear.

Live Demo Code
Shinola promotional email template preview

Promotional Email

Shinola

Promotional Email Shinola. Friends & Family Sale.

Live Demo Code