
Fundlet
Beautiful branded popup shops that turn fundraisers into a real acquisition channel for Shopify stores.
- Custom popup shops, fully branded
- Live progress tracking toward goals
- Orders & items tagged per campaign
I build Shopify apps, ship thoughtful ecommerce products, and partner with founders who care about the details. Based in Manchester, MO — working with clients everywhere.
Both apps hold Shopify's “Built for Shopify” status — their highest bar for performance, design, and integration. I design, build, and support them on my own.

Beautiful branded popup shops that turn fundraisers into a real acquisition channel for Shopify stores.

A library of 150+ polished theme sections, blocks, and product bundles — drop-in page-building for any Shopify theme.

A modern replacement for Stocky's inventory adjustments — history, employee tracking, and custom reasons.
Long-term partnerships where I function as an embedded engineer: strategy, design, build, and ongoing care.
A small selection of what merchants have written on the Shopify App Store.
“Excellent collection of highly customizable sections and blocks. The developer is also highly skilled and responsive.”
“It's elegantly simple which I appreciate — nothing added that doesn't need to be there. I tried other apps and solutions; this is the best.”
“From day one, Matt has been flexible, patient, and incredibly thorough. At no point did I feel rushed or dismissed. It's a partnership.”
“Setup took ten minutes and the popup looked completely on-brand. Matt answered every question within the hour. Couldn't ask for more.”
Pick the bucket of hours that fits your pace. Unused hours roll for 30 days. Month-to-month — cancel any time.
Most retainers draw from a mix of these. I'm one person you can hand ecommerce problems to.
Custom themes and deep theme customization — editorial, fast, and easy for your team to edit.
Private and public apps on Shopify's modern stack — I've done this twice, both Built for Shopify.
High-converting launch pages, seasonal campaigns, and product storytelling for your team.
Audits, Core Web Vitals fixes, structured data, and page-speed work that moves the needle.
Stitching Shopify to the rest of your stack — Klaviyo, ERPs, fulfillment, custom flows.
Your on-call ecommerce engineer. Roadmap, build, ship. I treat your store like it's mine.

I'm Matt — an independent engineer and designer based in Manchester, Missouri. I've spent most of my career in the space where good design meets real code, with a particular soft spot for Shopify and the merchants who live on it.
Today I split my time between two things: running my own Shopify apps — Fundlet and Section Star — and working as a long-term partner for a small number of brands I believe in. I'd rather do a few things really well than a lot of things just okay.
If we work together you'll get one person, fast replies, and the same care I put into my own products.
Your privacy and data are important to us. This policy applies to all apps and services built and supported by Matthew Smith LLC.
Matthew Smith LLC ("we," "us") builds software and services ("the App" or "the Service") used by merchants on platforms such as Shopify. This Privacy Policy describes how personal information is collected, used, and shared when you install or use any of our apps in connection with your store.
When you install an app, we are automatically able to access certain types of information from your store's platform, such as account, billing, and store-configuration data made available through the platform's APIs.
Where an app requires customer- or staff-facing data to function, that data is stored as metadata or assets within your own store whenever possible, rather than in our database.
We use the information we store to operate, maintain, and improve the App. We will not distribute or use your information for anything other than the purpose for which it was gathered, and we never sell your personal information to a third party.
If you are a European resident, you have the right to access personal information we hold about you and to ask that it be corrected, updated, or deleted. If you would like to exercise this right, please contact us using the information below. We note that your information may be transferred outside of Europe, including to the United States.
We retain account and record data for as long as your account remains active, and for a reasonable period afterward for our records, unless you ask us to delete it sooner.
We may update this policy from time to time to reflect changes to our practices or for other operational, legal, or regulatory reasons.
For questions about this policy or our privacy practices, contact us at matt@matthewsmith.com.