Engineering · Systems · AI
Build systems.
Ship products.
I'm Diljit — Engineering Manager at Avoca (YC '23), founder of QRCodeStack. I write about distributed systems, AI agents, and shipping real software. More about me »
I Ran a 397-Billion-Parameter Model on 20 GPUs With 16 GB Each
Splitting Qwen3.5-397B across 20 rented GPUs that can only reach each other through a relay: what limits the speed, what two days of testing fixed, and the real numbers.
OpenAI Realtime on a Phone Line: Telnyx SIP + Cekura Tests
Put OpenAI's gpt-realtime model on a phone number with Telnyx SIP, verify the webhook, fix one-way audio and clipped greetings, and test it with Cekura.
Learning Photography With Codex and a Sony ZV-E10 II
Learning photography with Codex on a Sony ZV-E10 II: all 10 practice photos, camera settings, and lessons in focus, aperture, shutter speed and ISO.
Best Clipboard Manager for Mac in 2026: 4 Worth Installing
Four Mac clipboard managers compared on history limits, search, privacy, sync and price: SnipVault, Paste, Maccy and Raycast. Which one to install, and why.
A Weekend Getaway to VAMA Retreats, Nandi Hills — With Two Dogs, One Pool, and a Lot of Tennis Balls
An honest trip report: two dogs at VAMA Retreats, a pet-friendly resort near Bangalore at the foot of Nandi Hills. Pet pool, camp night, and what to pack.
Your QR Code Is a Redirect — It Should Be an Engagement Layer
Packaging QR codes out-engage email. Raise scan engagement, capture declared customer intent, and turn offline touchpoints into retargeting audiences at scale.
The Essential Metrics for Voice AI Agents — From Milliseconds to Dollars
The complete scorecard of voice AI agent metrics and KPIs — latency, comprehension, CX, compliance, and the money math that turns containment into dollars.
I Lost $12,000 Dropshipping in India — And Why I Think It's a Capital-Intensive Business
I lost $12,000 dropshipping in India. Real numbers on ad costs, 20–40% COD RTO, $350–475 influencer videos, and the fix that got delivery to 92%.
SnipVault — clipboard manager for the Mac
QRCodeStack — dynamic QR code generator