Shopify apps
Index AI, Section Store and Combined Listings – BrandUp – public apps used by merchants worldwide, plus private apps built for a single store.
See the appsDeveloper team · Shopify Partner · Hamburg
We build Shopify apps used by merchants worldwide, engineer the systems behind online stores and automate the repetitive work – as a developer team that runs its own brands on the same code every day.
Brands that ship with us


Built with
What we do
Software for commerce is only useful when it runs in a real store. So we build the product, operate the stores and automate what sits in between.
Index AI, Section Store and Combined Listings – BrandUp – public apps used by merchants worldwide, plus private apps built for a single store.
See the appsMigration, custom themes and day-to-day operations for direct-to-consumer brands. Our own stores are the first place every idea has to work.
Agency servicesOrder, inventory, loyalty and email workflows that run without a human in the loop – connected to your warehouse system and Klaviyo.
How we automateHow we build
We are developers who happen to run stores, not marketers who outsource code. That shows in the stack, the release rhythm and the fact that every tool we sell runs in our own operations first.
1// nightly 03:00 - warehouse -> Shopify -> Klaviyo2const orders = await plenty.orders.since(lastRun, { window: 'month' })3for (const order of orders) {4 const synced = await shopify.orders.upsert(mapOrder(order))5 await loyalty.award(synced.customerId, points(order))6 await klaviyo.track('Order Synced', { order: synced })7}8await monitor.ok('sync:plenty', { count: orders.length })
Apps, dashboard, pipelines and themes share one language and one type system. A type check gates every deploy.
GraphQL Admin API, webhooks, theme app extensions and the Partner API – the way Shopify intends apps to be built.
PostgreSQL with hourly catalogue syncs and a unified order history across Shopify and the warehouse system.
Scheduled pipelines with alerts and rollback paths. If a sync fails at 3 a.m., we know before the merchant does.
AWS for data, Vercel for the web, Heroku for app backends. EU regions where the data requires it.
Themes deploy through GitHub sync, apps through staged rollouts. No big-bang launches, no six-month waterfalls.
Shopify apps
Every app started as a tool we needed ourselves. Free plans to start, paid plans when it earns its keep.
AI searchGet recommended by ChatGPT, Gemini and Perplexity: product data ready for AI shopping channels, AI texts from your store data, visibility and AI revenue measured.
Theme sections100 ready-made Shopify 2.0 sections, customised with live preview and added in one click. 14 free, no page builder, no theme code.
Colour swatchesShow separate products as colour, material or size variants – swatches and switchers on any plan, every product keeps its URL and stock.
Agency services
Each service has its own page with scope, process, references and an inquiry form.
Proof
Not pitches – brands we work with every week.

Shopware 5 to Shopify, full catalogue and order history, international markets – and an operations partnership that has run for eight years.

Shopware 6 to Shopify with a custom theme, loyalty program and member area. 100 % of products, customers and orders migrated.

A direct-to-consumer store built from scratch: custom design, mobile-first theme, Klaviyo flows and a loyalty program we operate daily.
How we work
After a short audit call you get a written price and timeline. No hourly surprises, payment in milestones.
The person who answers your email is the person who writes the code. Weekly status, one point of contact.
Shopify account, theme, apps, Klaviyo and data belong to you from day one. We work as staff and can be removed any time.


The team
A small group of developers and store operators in Hamburg. The people who answer your email write the code, run the stores and take the support calls – there is no layer in between.
Free tools
The checks we run on our own stores, open for everyone. No sign-up.
Knowledge Hub

llms.txt helps AI search engines understand your store. Learn how to write and deploy llms.txt on Shopify with the URL redirect method, verify that AI crawlers can read it, and where it fits next to product data and structured data.

Your competitors get recommended by ChatGPT but you don't? Here's exactly why AI search engines ignore most Shopify stores and the 7 steps to fix it.

The SEO landscape shifted dramatically — AI Overviews dominate results, Core Web Vitals got stricter, and structured data is no longer optional. Here's what Shopify merchants need to know.
Start a project
One message is enough. We come back with a short call slot, a straight answer on what we would do – and a written fixed quote afterwards. No obligation.