Case studiesCase Studies: How We Build Real Products
How we design, build and run real software, with the stack, the architecture and the lessons. Every fact on these pages is checkable, and we only publish client figures that a client has given us.
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SaaS / Business software
Workspace369: a Flutter and Firebase SaaS for client work
An all-in-one workspace for freelancers and small service businesses: CRM, proposals, invoicing and payments, scheduling, a shared email/SMS/voice inbox, accounting and AI, in one Flutter app on iOS and the web.
- Flutter
- Dart
- Firebase
- +7 more
Consumer / Music
3693: a private music app in Flutter and Firebase
A private music app built with Flutter: search, a now-playing screen with lyrics, a queue, playlists, liked songs, a cloud library, listening stats and light and dark themes, on a typed Firebase backend.
- Flutter
- Dart
- just_audio
- +6 more
AI / Image processing
Deep Dream: a Flutter app and a PyTorch queue behind it
A Flutter app sends a photo to a Python API. A Redis queue hands the job to a PyTorch worker that runs DeepDream on a convolutional neural network, and the dreamed image comes back to save to the gallery.
- Flutter
- Dart
- Python
- +5 more
Consumer / Collectibles
DG Card: scan a trading card and match it on the device
A Flutter app for trading card players. Point the camera at a card, on-device text recognition reads it, and the app matches it against a synced card database. From there you track a collection, build decks and trade with other players.
- Flutter
- Dart
- Firebase ML Vision
- +4 more
Automotive / Security hardware
Bull Horn GPS Alarm: one-tap SMS commands for an alarm
A Flutter app that works as a remote control for GPS vehicle and asset alarms. Each alarm is saved once with its phone number and password, and every command after that is one tap.
- Flutter
- Dart
- sqflite
- +3 more
Landscaping / Field sales
Artificial Grass Masters: a field estimator and job sign-off app
A Flutter app for an artificial-turf installer. A rep measures a yard on a map, prices the grass, delivery and dumpster on the spot, and closes the job with photos, a customer signature and a rating. The company gets a text message when a new rating comes in.
- Flutter
- Dart
- Google Maps
- +5 more
AI integration / Open source
saas-mcp-connector: a safe MCP server for a SaaS API
An MCP server that lets Claude Desktop, Claude Code and other MCP clients use a SaaS product's API safely. Every call is scoped to one user's workspace, writes need explicit confirmation, and the HTTP transport is rate limited.
- TypeScript
- Node.js
- MCP
- +3 more
Fiverr buyers
From Fiverr buyers, in their own words
Three buyers who came back again and again, told through their public reviews on Simon’s Fiverr profile (opens in a new tab). Quotes are word for word. Buyers are shown by first name and country only.
Mark, United States
Sixteen five-star reviews from one buyer: mobile apps, app design and a Shopify store
Mark’s first Fiverr review of Simon, in October 2020, is for a mobile app. Over the next 21 months he left 15 more, for more app development, app design, a Shopify store and custom orders. All 16 are five stars.
A buyer in the United States
A large custom app build, delivered on the back end and the front end
A buyer in the United States first reviewed Simon in February 2022, then reviewed a large app build four times between April and August. All five reviews are five stars.
Rachel, Canada
Four Shopify reviews in under three months, then an app
Rachel left her first review of Simon’s Shopify work in November 2020 and her second nine days later. Her third came in December, a fourth Shopify review in February 2021, and her fifth, in March 2021, is for an app. All five are five stars.
Simon DziakFounder and head developer
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