KiezGold
Flea markets across Germany on one map.
As a freelance developer I build KiezGold's app, website, admin panel and data pipeline, in production while people use it. 250+ commits across four repositories since June 2026.
- Role
- Software Developer (freelance) · Grant Developments UG, Berlin
- Period
- 06/2026 – now
What I work on
- New features for the Flutter app on iOS and Android, from UI to backend.
- Live maintenance: bug fixes, performance and regular releases.
- Website and admin panel built further in Next.js.
- An AI market agent that finds, cleans and geocodes new flea markets.
- Data pipeline with scrapers, Supabase Edge Functions and push notifications.
- Product analytics with PostHog: events, funnels and dashboards.
Results
- More flea markets on the map, because new sources are found and checked automatically.
- More reliable listings: fewer duplicates, correct addresses and markets in your own language.
- Better usability, because analytics show where people get stuck and what to build next.
- New features and fixes reach users without the app going down.
Tech stack
App
- Flutter
- Dart
- Riverpod
- go_router
- Mapbox
- Firebase Messaging
Web & admin
- Next.js
- React
- TypeScript
- Tailwind CSS
- Vercel
Data & backend
- Supabase
- Postgres / SQL
- Edge Functions
- Apify
- Crawlee
- Playwright
AI & analytics
- Claude
- Mistral
- PostHog