Most Shopify devs ship code.
Most CRO agencies don't ship code.
We do both.
Senior engineering executed with the rigor of a CRO team. Every build is instrumented. Every change is testable. The code is clean enough to hand to your next dev without an apology.
If you ever leave, everything is documented and yours. No lock-in, no handover fee.
Start with a teardown.
Ten days. We go through your store the way we go through our own code, then hand you the findings, the fixes, and one of them already shipped.
What you get
A written audit, file by file
Theme architecture, bundle weight, Functions, subscription logic, middleware. Code-level specifics, not "improve your CTAs."
A recorded walkthrough
Filmed on your actual store, not on a slide deck. Watch it on your own time. No standing meeting on your calendar.
A prioritized roadmap with effort estimates
Every finding carries where it lives, what it measures, what it costs to fix, and the arithmetic behind the impact, using your traffic and your conversion rate. Hand it to any developer, including one who isn't us.
One fix, already shipped
We take the highest-return item and send it as a merge-ready diff, plus a dev store where you can see it running. Yours whether or not we work together.
Thirty days of questions
Ask us anything about the findings after delivery. No clock running.
How it works
- Day 0 · Access
You grant staff access. The ten days start here, not when you sign.
- Days 1 to 5 · The dig
Baseline capture, then theme architecture, render path, cart and discount logic, subscriptions, middleware, and what you are and aren't measuring.
- Day 6 · We ship one
The highest-return fix, built on a fork. Never on your live theme.
- Days 7 to 9 · Delivery
Document, walkthrough, roadmap, and your next three steps scoped and priced.
Credits 100% toward a project if you move forward within 90 days.
If the teardown doesn't surface three problems worth more than the fee, you don't pay.
Four areas. One senior team.
Theme architecture that survives the next ten apps.
Custom Online Store 2.0 themes built with modern tooling — Vite, Alpine.js, no jQuery rot. Code your next dev won't have to rewrite.
Shopify Functions that move the needle, not the cart UI.
Cart transforms, custom discounts, delivery and payment customization. Native to Shopify. No app dependency, no checkout flicker.
Subscription work past the off-the-shelf widget.
Recharge and Skio — migrations, Affinity portal customization, PDP toggles that default the right way. Built to hold up at 10K+ subscribers.
Middleware where Shopify stops and your business starts.
Cloudflare Workers, Pipedream, custom Remix apps. The integrations your ops team needs without bloating the storefront.
The proof.
$1M+/month wellness brand
Migrated a heavy legacy theme to Online Store 2.0 with a modern build system. Removed 280KB of jQuery and legacy tooling. Cut LCP by 1.8s.
Engineering led by Sergio Herrera as Lead E-commerce Developer.
Mid-market DTC
Audited a Recharge program approaching 10K subscribers and migrated to Skio with zero subscriber loss. Rebuilt the PDP subscription widget and Affinity portal customizations.
Engineering led by Sergio Herrera under contractor agreement.
Bilingual retail brand
Custom Cloudflare Worker handling product sync between an internal ERP and Shopify, replacing a flaky third-party connector.
Engineering led by Sergio Herrera under contractor agreement.
Three ways
to engage.
We scope before we sign. Pricing is fixed-fee or retainer, never hourly.
Project
From $8,000. Fixed-fee, milestone-based.
Fixed scope, fixed price. If we misjudge the estimate, that's our problem, not a change order.
Retainer
From $4,000/month. Three-month minimum.
Month to month after the first three. Thirty days notice, no exit fee.
Tell us what's broken.
Or what's working but underperforming. Or what your last dev said couldn't be done. The first reply comes from Sergio.