Overview

PaperDesk is a multi-service paper exchange for spot and USD-margined perpetuals. It is built to show the path after Buy: a single-writer matching engine, an OMS with a Postgres outbox, a gateway over Redis Streams and SSE, and a separate Timescale writer for history. Balances are paper money. The point of the project is durable order flow, reconnects, and crash windows that a single CRUD API usually hides.

Highlights

• › Spot + perpetual markets
• › Single-writer matching engine
• › WAL and snapshot recovery
• › OMS outbox over Redis Streams
• › SSE reconnect with catch-up
• › Margin, mark, liquidation, funding
• › Timescale market history
• › Grafana ops dashboard

Overview

ColabCanvas was built to explore the challenges of real-time collaboration at scale. It uses WebSockets for low-latency communication and a monorepo to share types across the frontend, REST API, and collaboration service.

Highlights

• › Real-time Drawing
• › Multi-room collaboration
• › Live presence cursors
• › Infinite canvas with drawing tools
• › Secure authentication

Overview

SSH leaves you with docker ps, ss, and systemctl, and none of them answer how the box is wired. wtfisrunning discovers containers, listening ports, nginx proxy paths, and systemd units over a local scan or SSH, then draws that as a topology in the terminal. Nothing is installed on the server.

Highlights

• › Local or remote scan over SSH
• › Services, ports, and proxy topology
• › Inspect logs and blast radius
• › No agent on the host