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. Client numbers are either public, like App Store ratings, or given to us by the client.
Browse All Case Studies
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
Field service software / Contractor CRM
QuoteIQ: a contractor CRM in Flutter, Nuxt and Firebase
A CRM for home service contractors: quotes, scheduling, invoices and payments, customer messaging and AI automations, on iOS, Android and the web. On the App Store since September 2022, with 3,400+ ratings and a 4.7 average.
- Flutter
- Dart
- Nuxt
- +4 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 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.
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Simon DziakFounder and head developer
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