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SHOPIFY APP & THEME DEVELOPMENT STUDIO

We build the Shopify software merchants actually keep installed.

Techsider is an engineering studio focused entirely on the Shopify ecosystem — embedded apps, checkout extensions, and Online Store 2.0 themes, built on production-grade infrastructure and shipped to the Shopify App Store.

Start a Project Explore Our Apps
★★★★★ 2 apps live on the Shopify App Store · Built with React Router v7 & Cloudflare Workers
RevLoop logo
RevLoop
Subscription management
★★★★★Subscriptions · MRR analytics
Live on Shopify App Store
OneTapCart logo
OneTapCart
Post-purchase upsells
★★★★★One-click offers · AOV growth
Live on Shopify App Store
100%
SHOPIFY-FOCUSED
02
APPS ON THE APP STORE
RR7
REACT ROUTER v7 SSR STACK
CF
RUNS ON CLOUDFLARE WORKERS
What we do

Two disciplines. One ecosystem.

We don't spread across marketing, mobile, and web design. Every engineer at Techsider works inside the Shopify ecosystem, full time.

01 — Apps

Shopify App Development

Custom embedded apps and checkout UI extensions, built for merchants who need more than what the App Store offers off the shelf.

  • Embedded apps with Polaris & App Bridge
  • Checkout UI & post-purchase extensions
  • Billing, Usage Meters & App Events API
  • Admin & Storefront GraphQL integrations
  • Cloudflare Workers backend architecture
02 — Themes

Shopify Theme Development

Online Store 2.0 themes engineered for speed and conversion — not templated builds, but storefronts tuned to a brand's identity.

  • Custom Online Store 2.0 themes & sections
  • Liquid, Tailwind CSS & JavaScript builds
  • Core Web Vitals & performance tuning
  • Platform migrations into Shopify
  • Ongoing theme support & iteration
Shopify CLIRemix / React Router v7Prisma + Postgres Shopify FunctionsMetafields & MetaobjectsApp Store Optimization
Our apps

Built by us. Running in production.

We use our own infrastructure to ship and operate apps on the Shopify App Store — the same standard every client project is held to.

01 — REVLOOP

Grow recurring revenue with confidence.

RevLoop helps Shopify merchants launch and manage subscription products effortlessly — from selling plans to MRR analytics and churn reduction, all from one dashboard.

Subscription selling plans
MRR & churn analytics
Self-service customer portal
Dunning & failed-payment recovery
Visit RevLoop View on App Store
RevLoop logo
RevLoop
Subscriptions for Shopify
★★★★★Subscriptions & recurring revenue
revloop.techsider.co
MRR
Live analytics
↓ Churn
Dunning automation
02 — ONETAPCART

Turn every order into more revenue.

OneTapCart shows one-click upsell offers immediately after checkout. Merchants configure offers, measure accept rates, and grow AOV — all without adding friction to checkout.

One-click post-purchase offers
Thank-you page fallback offers
Accept-rate analytics
Checkout & Thank You extensions
Visit OneTapCart View on App Store
OneTapCart logo
OneTapCart
Post-purchase upsells
★★★★★Post-purchase upsells & AOV
onetapcart.techsider.co
1-click
Post-purchase offers
↑ AOV
Accept-rate tracking
How we work

From brief to the App Store.

A consistent process for every engagement, whether it's a custom app or a full theme rebuild.

01

Discovery

We map merchant workflows, technical constraints, and the Shopify APIs the project depends on before any code is written.

02

Design

Interfaces are designed in Polaris or your brand system, prototyped, and reviewed before development starts.

03

Build

Engineering on React Router v7, Prisma, and Cloudflare Workers, with staging environments mirroring production.

04

Launch & Support

App Store submission, theme QA, and ongoing support once merchants and customers are using it live.

Stack

The infrastructure behind every build.

React Router v7 Remix Shopify Polaris Shopify App Bridge Cloudflare Workers Prisma Liquid Tailwind CSS GraphQL Admin API
About Techsider

A studio built for one platform.

Techsider exists because most agencies treat Shopify as one service among many. We made the opposite choice: every project, every engineer, every hour goes into the Shopify ecosystem.

That focus shows up in the apps we operate ourselves — RevLoop and OneTapCart aren't demos, they're live products on the Shopify App Store, built on the same infrastructure we use for client work.

We work with merchants and agencies who need more than a template: custom embedded apps, checkout extensions, and themes engineered to convert.

"We don't build agency demos. We build software that stays installed after the invoice is paid."

Let's build

Ready to ship on Shopify?

Whether it's a custom app, a checkout extension, or a full theme rebuild — tell us what you're building and we'll take it from there.

hello@techsider.co See Our Apps