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Web & HTML Email Developer
Klaviyo Specialist

Web & Email Developer specializing in responsive HTML email templates and full-stack web applications. I hand-code emails that render perfectly across Gmail, Outlook, Apple Mail, and 30+ clients. Experienced with Klaviyo platform, email automation workflows, and rigorous cross-client testing to ensure optimal deliverability and performance.

David Gutierrez
Web / HTML Email Developer
Los Angeles, CA

About Me

Web & HTML Email Developer with 4 years of experience building responsive email templates, automation workflows, and web applications. I specialize in hand-coded HTML/CSS that renders flawlessly across Gmail, Outlook, Apple Mail, and 30+ email clients. I recently built MintyEmailTester.com - a SaaS tool for email QA - demonstrating my full-stack development skills and deep understanding of email rendering challenges. I bring precision, attention to detail, and clean, maintainable code to every project.

Key Skills

  • Responsive Web Design
  • Responsive Email Design
  • Hand-coded HTML/CSS Email Templates
  • Klaviyo Platform Experience
  • Cross-Client Testing (Litmus)
  • Email Accessibility Standards
  • Version Control (Git)
  • Python/Flask Development
  • WordPress

Tech Stack

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

SaaS

Minty Email

HTML Email Tester

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 campaigns across 30+ email clients with 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.

Email Marketing Website

Minty Email

Email Marketing Agency

MintyEmail.com

Email marketing consultancy website targeting small to medium-sized businesses and e-commerce brands. Focuses on helping business owners seeking fresh strategies to increase sales through custom email campaigns, automated sequences, and responsive template design. Specializes in Klaviyo automation setup, segmentation, and custom template integration.

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.

Shinola promotional email template preview

Promotional Email

Shinola

Promotional Email Shinola. Friends & Family Sale.

Re-engagement email template preview

Re-engagement Email

Bike Shop

Re-engagement email for a bike shop, encouraging inactive customers to return.

Cart abandonment email template preview

Cart Abandonment Email

Bike Shop

Cart abandonment email for a bike shop, reminding customers of items left in their cart.

Bike shop promotional email template preview

Promotional Email

Bike Shop

Promotional email for a bike shop, showcasing a limited-time offer on cycling gear.

Back-in-stock email template preview

Back In Stock Email

Bike Manufacturer

This HTML email alerts customers when a previously out-of-stock product becomes available for purchase.

Newsletter email template preview

Newsletter Email

Tea Shop

Newsletter email for a tea shop, featuring the latest products and promotions.

Transactional email template preview

Transactional Email

Tea Shop

Transactional email for a tea shop, confirming a recent purchase.

Welcome email template preview

Welcome Email

Tea Shop

Welcome email for a tea shop, introducing new customers to the brand.