Platforms

Projects and platforms developed under Karwan Stark AB. From social infrastructure to developer tools and protocol research.

Kretsar

Social Platform

Swedish social media with verified identity

Production

kretsar.se

A social media platform built for Sweden, using BankID for authentication and 18+ age verification. Features real-time messaging, rich text posts, media sharing, and community circles — all with verified identities.

Next.js 16React 19PostgreSQLRedisBankIDMinIO

Karwan.dev

Portfolio

Personal portfolio of Karwan Stark

Active

karwan.dev

The personal profile and portfolio of Karwan Stark, founder and CEO of Karwan Stark AB. Showcasing work, writing, and technical projects.

Next.jsTypeScriptTailwind CSS

Modulverket

Platform

Development platform for client work

Active

modulverket.se

Currently runs live products for active clients, operated in connection with Karwan Stark AB.

Next.jsPostgreSQLNginxPM2

Teapot Protocol

Protocol

Custom URL protocol for the open web

Research

A LibreWolf-style Firefox fork introducing teapot:// and teapots:// URL protocols as HTTP/HTTPS aliases. Patch-based approach for easy rebasing on new Firefox versions.

Firefox 133C++RustZig