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Mike Brennan

PRO
Shopify Plus Engineer
United States
English
Customer Rating:
5.0(2 reviews)
Starting Price:

$795.00

Local Time: 12:29 PM
Other Links
Phone Number

+17165080295

Business Address
Address Verified

260 E. Main Street Suite 6904 Rochester NY 14606

About

shopexpert since: January 2026

Engineering Capacity for Growth Teams

I help Shopify brands implement the technical improvements that increase conversion and revenue per visitor.

Teams have great ideas to improve performance: cart incentives, product page improvements, promotions, integrations...but engineering capacity often becomes the bottleneck.

My work focuses on translating those initiatives into reliable Shopify implementation so teams can move quickly without disrupting their storefront.

Who I work best with:

I often collaborate with growth teams and marketing agencies that need a reliable Shopify engineering partner. Most of my work involves ongoing storefront optimization and technical implementation supporting growth teams and marketing initiatives.

I help implement those initiatives across the storefront so campaigns can launch quickly and perform reliably.

Typical collaboration includes:

  • cart and checkout improvements

  • product page conversion enhancements

  • promotion and merchandising systems

  • storefront performance optimization

  • integrations and technical troubleshooting

I’ve spent the past 12+ years working to increase engineering capacity for rapid storefront iteration.

Recent work includes Shopify migrations, storefront optimization, and ongoing engineering support for brands such as:

Donald Ross Sportswear (WooCommerce → Shopify Plus migration, build and launch, ongoing customizations and app work supporting marketing and ad teams)

Jeff Dunham (WooCommerce → Shopify migration, build and launch, ongoing technical management)

Just Keep Livin’ (theme refresh, technical adjustments, and Giving Tuesday campaign support).

Services Offered
Development & Troubleshooting
AI & Tech Solutions
Store Setup & Management
Technical Support & Maintenance
Marketing & Sales
Regions Served
United States
Canada
Packaged Services
Shopify Conversion Optimization Sprint
Shopify Conversion Optimization Sprint
Starting Price

$1,499.00

Shopify Storefront Performance & Troubleshooting
Shopify Storefront Performance & Troubleshooting
Starting Price

$795.00

Fractional Shopify Engineering
Fractional Shopify Engineering
Starting Price

$2,499.00/month

AI-Ready Product Data for Shopify
AI-Ready Product Data for Shopify
Starting Price

$795.00

Customer Reviews
Rating:
5.00
(2 Reviews)
5 stars
(2)4 stars
(0)3 stars
(0)2 stars
(0)1 star
(0)
Anonymous M.
Shopify Brand
Rating:
5.00

Mike assisted in our efforts to move over from WooCommerce to Shopify and continues to integrate the backend of our site, so users have a seamless experience for their shopping needs.

Project ValueMore than $100,000
Review Source
invited
PostedFeb 18, 2026
Mariana P.
Shopify Brand
Rating:
5.00

I have had the pleasure of working with Mike and his great team for over 5 yrs. He is quick to reply and always gives a really quick remedy. We have a great working relationship and would recommend his company to others.

Project ValueMore than $100,000
Review Source
invited
PostedFeb 13, 2026
FAQ
What types of Shopify work do you specialize in?

I specialize in storefront engineering that improves conversion and performance. Most projects involve cart improvements, product page UX, storefront speed optimization, integrations, and technical implementation for marketing initiatives. Also experienced with full store builds and store migrations from WooCommerce.

Do you handle Shopify migrations?

Yes. I’ve worked on multiple WooCommerce → Shopify migrations including full storefront builds, data migration, and post-launch optimization.

What size brands do you typically work with?

Most clients are growth-stage ecommerce brands running active marketing programs and looking to continuously improve storefront performance.

Do you offer ongoing Shopify support?

Yes. Many clients work with me through ongoing engagements where I provide dedicated engineering capacity for continuous storefront improvement.

Do you work with marketing teams or agencies?

Yes. Many clients are growth teams and marketing agencies that need Shopify engineering capacity to implement storefront improvements tied to campaigns and CRO initiatives. Milexi works as an extension of the team, complementing existing agencies by handling the technical implementation behind storefront optimization and commerce initiatives. Many agencies bring Milexi in as the engineering partner behind storefront optimization projects.