topic - 7 posts
Engineering
Deep engineering write-ups - building real systems end to end, the trade-offs, and what broke along the way.
slate: Turning a Phone into a Stream Deck for macOS - One Command, a Pluggable Backend, and the Trade-offs Behind It
How I built slate - a free, open-source phone-as-Stream-Deck for Mac that runs over your LAN with no cloud. One semantic Command, a pluggable Transport, a Zod schema shared across three languages, and the trade-offs (including why not WSS) behind it.
engineering07/01/2620 min
Bear the Tokens: FP16 and Suffix Decoding to 9,000+ Tokens a Second on a Tesla T4
How I pushed Qwen2.5-0.5B to 9,052 tok/s on a free Colab Tesla T4 in the H2Loop inference contest - from AWQ INT4 dead ends to FP16 plus model-free suffix speculative decoding.
engineering06/14/2621 min
Logpipe: Building a Distributed Logging Stack from Scratch with Vector and ClickHouse
How I built Logpipe - a small but real Vector + ClickHouse logging pipeline in Go. Why batching at an aggregator is the whole point, what 'Too many parts' actually means, and how disk buffers stop you from losing logs on a restart.
engineering06/14/2625 min
TapTalk: Building a Free, Local, Open-Source Alternative to SuperWhisper and Whisper Flow
How I built TapTalk - a fully local, privacy-first speech-to-text app for macOS in Rust and SwiftUI. On-device Whisper, Core ML on the Neural Engine, chip-tuned inference, and a global push-to-talk hotkey. No cloud, no subscription.
engineering05/24/2621 min
The Three Levers: Backend-Driven UI, OTA Updates, and the End of Waiting for App Review
How Swiggy, Airbnb, PhonePe, and Nubank ship UI changes without waiting for app store approval - and how I built a working BDUI + OTA system in React Native with Cloudflare Workers and EAS.
engineering04/30/2618 min
Building a Real-Time F&O Fair Value Engine for Indian Markets
How we built a production fair-value calculator on top of Dhan - Black-Scholes, cost of carry, live depth, and mispricing signals - for Saras and NSE F&O.
engineering04/11/267 min
Building a World-Monitor News Engine for Traders: From ~115 Public Sources to a Daily Brief
How we built an agentic pipeline at Saras to scrape public macro and trade intelligence, dedupe at scale, enrich with structured AI, and ship a trader-facing brief - plus why Scrapling's StealthyFetcher sits in the hot path.
engineering04/11/267 min