Work from 0xtanzim.

Multi-tenant salon booking platform, built solo end-to-end. 27 domain modules across 110+ tables. Booking writes are protected by a pessimistic row lock plus a partial unique index as a hard backstop; a separate Redis mutex guards the temporary slot-hold cache. Caught and fixed a real production billing bug where two disconnected settings quietly disagreed on the platform's cut of every booking. Live at donebyme.dk.

Modules

27 domain modules

Decisions

11 ADR-level

Architecture

18 signals

VS Code extension to preview and generate project folder trees before files hit disk. 36,000+ installs on the Marketplace, 5.0 average rating. Conflict-aware by design — existing files are never silently overwritten.

downloads

36,000+

Decisions

7 ADR-level

Architecture

Outlined

A TypeScript backend framework monorepo — 20+ packages covering a segment-trie router, a tsyringe-wrapped DI layer, Koa-style middleware, and Node/Bun/Deno/Edge adapters. Benchmarked with autocannon against Fastify, Express, Koa, and Hono: 14% overhead vs raw Node.js, and it wins the middleware-stack scenario outright (32,220 RPS vs Fastify's 28,744).

Status

In progress

Decisions

4 ADR-level

Architecture

5 signals

A Javalin-inspired JVM framework: 5 Maven modules, a real trie-based router, reflection-based dependency injection with classpath scanning, and a JavaPoet annotation processor that generates transactional wrapper classes at compile time. Benchmarked against Spring Boot with autocannon-style load testing — faster on routing and hello-world, slower on JSON body parsing and query-param routing.

Stack

Java / Maven

Decisions

4 ADR-level

Architecture

5 signals