Three systems we
quietly operate.
We don't take on many clients, so the ones we do, we go deep with. Here are three systems we've built and continue to run, in production, today.
Growth App
A centralised operations layer running 985 Android devices and 2,760 social media accounts across 4 production servers, built so 16 partners can scale their outreach without ever opening a phone.
Engagement
The brief
The team was running social-media growth operations the hard way: humans on individual phones, copy-pasting between spreadsheets, manually rotating accounts when one got rate-limited. It worked, barely, and it didn't scale past about ten devices.
What we built
A central app (elselab.io/growth) that talks to 985 physical Android devices over ADB, distributed across 4 servers. Account pipelines, source accounts, AI-driven search, partner-level segmentation, work-time scheduling, follower / following / story tracking, real-time health checks. Operators see one screen, not a thousand.
The result
16 partners now run their day-to-day operations on top of the system, managing 2,760 social media accounts in parallel. The work-time scheduler runs accounts on their own clocks; reply rates went up because messages get sent at the right moments; the team can onboard a new device or partner in minutes, not days.
CatalogOS
Operations system for a Swiss reseller running on Europe's largest online marketplace. Order files in, normalised orders + shipments + invoices out. 98,000 products, 9 providers, real-time EUR/CHF pricing, all in one place.
Engagement
The brief
A Swiss reseller listing on the country's largest online marketplace, running their entire back office out of Excel. Orders arrived as XLSX files, prices had to be re-margined against EUR/CHF every day, nine different providers had different commission structures, and invoicing was a manual Word-to-PDF ritual every week.
What we built
A single operations system that ingests the marketplace's order files, normalises them into a Postgres-backed catalog of 98k+ products, calculates live CHF selling prices off the current FX rate per provider commission, generates shipment manifests and PDF invoices on demand, and keeps a blacklist of 1,055 problem barcodes so they never get re-listed. Plus the side tools (profit calculator, currency converter, bulk product data filler) that the team actually uses every day.
The result
The whole operation runs from one tab. Orders go from Excel inbox to shipped-and-invoiced in minutes, not days. The catalog grew past 98k products without adding people. Every CHF figure on screen recalculates the moment the FX rate shifts. The Monday-morning Excel war is over.
XML Integration
An integration layer for a multi-vendor commerce platform. Providers publish XML, sellers map once, cron syncs every minute. Products land on a Shopify-style storefront ready to sell, dropship handoff included. No human in the import loop.
Engagement
The brief
A multi-vendor commerce platform wanted to let its sellers list bulk inventory from any B2B provider that publishes an XML feed, without the platform team writing a custom integration per provider, and without sellers ever doing a manual import. The catch: every provider's XML schema is different, every seller's commission model is different, and the storefront needed clean, structured product data on the other end.
What we built
A four-piece pipeline. (1) A Providers admin where you paste an XML URL, set a commission %, and you're done. (2) A Mapping UI that connects provider XML fields to the platform's product schema (name, price, stock, variants, attributes), saved per provider. (3) A scheduled sync running off a one-line crontab entry that hits every provider once a minute, normalises, and bulk-pushes products to the seller's storefront. (4) Side tools (Users, Products, API Settings, Clear Cache) wrapped in a clean control panel so the operations team can see what the system is doing without reading logs.
The result
Sellers connect a feed and start selling the same hour. New providers go from "never seen this XML before" to live on the storefront in under fifteen minutes, the time it takes to map the fields once. The cron tick keeps stock and prices fresh without anyone watching. And because the dropship handoff is wired into the same flow, orders forward straight back to the provider with the right margin already taken out.
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