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Bonus Episode: Growing Your Brand Beyond Technical Fixes with Sia Karamalegos

Honest Ecommerce
Honest Ecommerce
Episode • Apr 3, • 30m

Sia Karamalegos is a freelance web developer and web performance engineer helping ecommerce brands turn faster load times into real revenue. As a Google Developer Expert in Web Technologies and a former engineer on Shopify’s performance team, Sia brings a unique blend of hands-on experience and deep technical insight to the challenge of building faster, more performant online stores.

With a passion for developer education and community building, Sia organizes the Eleventy Meetup, Durham Social Hack Night, and a new global web performance meetup, connecting engineers around the world to share real-world tactics and tools. She’s also a frequent international speaker and writer, known for making complex topics like Core Web Vitals and JavaScript performance approachable and actionable.

In 2024, Sia launched ThemeVitals, a tool that benchmarks Shopify themes using real user data—not lab simulations to uncover which themes actually perform well across the devices your customers use. It’s a mission rooted in impact: helping merchants and theme developers make smarter, faster decisions that drive conversion and long-term growth.

Through her work, Sia is redefining how ecommerce teams think about performance, showing that real user data, smart defaults, and community-driven tooling can transform the way we build the web.

In This Conversation We Discuss: 

  • [00:40] Intro
  • [01:00] Focusing on real-world site speed fixes
  • [02:39] Improving performance metrics for merchants
  • [04:22] Translating Google metrics for merchants
  • [04:56] Understanding how Core Web Vitals work
  • [07:34] Balancing traffic vs technical optimization
  • [10:36] Shifting focus from speed to sales
  • [13:16] Balancing performance with product experience
  • [15:26] Highlighting global device performance gaps
  • [16:54] Uploading giant images the wrong way
  • [21:04] Auditing your tech stack regularly
  • [21:53] Comparing Shopify themes with real data
  • [24:11] Balancing features vs speed in theme choice
  • [26:00] Avoiding minimalist themes that lack function
  • [28:08] Encouraging feedback for future improvements

Resources:

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