I build fast systems for markets and networks: C++ trading infrastructure, quant research tooling, telecom / broadband data pipelines, and open-source developer tools you can run in one command. MS Electrical Engineering @ Columbia (ML + internet systems) · building broadband planning infrastructure at Wireless 20|20 · co-founder of Crowded.
📊 Featured: booktop
A live order book in your terminal, like htop for markets. uvx booktop streams the real BTC-USD book from Coinbase: depth ladder, trade tape, imbalance and flow. No key, no setup. It also replays any stock from a NASDAQ ITCH day.
⚡ Featured: fastitch
NASDAQ TotalView-ITCH 5.0 → Polars / pandas / Parquet, at native speed. One pip install, all 23 message types, streaming in constant memory, plus order-book reconstruction. 51x faster than existing Python parsers on real NASDAQ data.
import fastitch
frames = fastitch.read("12302019.NASDAQ_ITCH50.gz", types="orders", symbols=["AAPL"])
book = fastitch.book("12302019.NASDAQ_ITCH50.gz", "AAPL", depth=5, every="1s")| Tool | Try it | What it does |
|---|---|---|
| subwaytop | uvx subwaytop |
Every NYC subway train, live, on a map in your terminal, plus departure boards and service alerts |
| zombieports | uvx zombieports |
What's running on port 3000? Every listening port, which project started it, how long it's been up, and one key to kill the forgotten ones |
| whoholdsup | uvx whoholdsup |
Who holds up your app? Reads your lockfile and shows how many dependencies are kept alive by one person, untouched for years, or recently changed hands |
| sketchydeps | uvx sketchydeps |
Is anything sketchy installed? Checks node_modules and your Python env for known malware, typosquats, brand-new packages and install-time code |
| isitthewifi | uvx isitthewifi |
Is it the Wi-Fi? Grades your connection A–F (lag under load, jitter, loss, DNS) and tells you in plain English whether it's your Wi-Fi, your router, your ISP or DNS |
| whotalks | uvx whotalks |
Who does your computer talk to? Watches every connection for a minute and groups them by company and app, with a privacy grade |
| slowrc | uvx slowrc |
Why does your terminal take so long to open? Profiles your .zshrc line by line and fixes the slow parts safely |
| loosekeys | uvx loosekeys |
Finds API keys sitting in plain text on your laptop: shell history, forgotten .env files, AI tool & MCP configs. Masked output, nothing leaves your machine |
| shellwrapped | uvx shellwrapped |
Spotify Wrapped for your terminal: top commands, typos, 2am sessions, your shell personality |
| codewrapped | uvx codewrapped ~/code |
Spotify Wrapped for your code, across every git repo on your machine, private ones included |
| Project | What it does |
|---|---|
| Limit Order Book Simulator | Price-time priority matching engine, fixed-point prices, cache-aware layout |
| Lock-Free Queues | SPSC ring buffer + bounded MPMC queue, every memory_order justified |
| Latency Benchmarking Harness | RDTSC cycle counting: caches, syscalls, atomics, branch misprediction |
| ITCH 5.0 Parser & Replay | Book reconstruction + microstructure analytics on real NASDAQ data |
| FIX 4.2 Parser & Order Router | Stream parser, session state machine, smart order routing |
| Multicast Market Data Analyzer | UDP feed timing, gap detection, pcap replay |
| Project | What it does |
|---|---|
| Optimal Execution | Almgren–Chriss with Monte Carlo and TWAP/VWAP benchmarks |
| Factor Model & PCA Alpha | Factor construction → alpha → backtest → attribution |
| Regime & Volatility | HMM regimes; EWMA vs GARCH vs GJR vs HAR-RV out of sample |
| Project | What it does |
|---|---|
| gtp-meter | GTP-U / Diameter parsing with line-rate per-subscriber metering |
| Policy / Authorization Service | 5G PCF / 4G PCRF-style real-time policy decisions |
| 6G Channel Estimation | Neural OFDM estimators: +11.7 dB NMSE over mismatched MMSE |
| Polyglot ASIC | Programmable protocol-emulator chip for Jane Street's Tiny Tapeout contest |
| SignSpeak | On-device ASL fingerspelling on an ESP32-S3 with a BLE Flutter app |
Stack: C++20 · Python · Polars/Arrow · PyTorch · Linux networking · Verilog Find me: arkakhorchidian.com