Buildopsy
Forensic teardowns of production systems: distributed systems, AI infrastructure, telemetry pipelines and cloud bills, down to the cost per request. Every claim reconstructed from public disclosures, every model runnable in your browser.
Edited by Mukul Kumar Mishra · Research desk: Rook · About the publication
Featured System Architecture
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Cursor and Claude Code Postmortem: The Token Meter Is the Real Pair Programmer
A forensic teardown of token limits, context rot, compaction cliffs, productivity math plus the fixes vendors keep postponing.
Recent Engineering Writing
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Perplexity Postmortem: The Answer Engine That Pays for Every Question Twice
A forensic teardown of RAG retrieval, KV cache flaws, prefill tax, 780M monthly queries plus the cost difference at 1M events per second.
Replit Agent Postmortem: The Day the Demo Became Production
A deep teardown of prompt-to-production software, sandbox execution, agent retries, deployment risk plus the cost difference at 1M events per second.
Vercel Fluid Compute: The Serverless Bill Was Waiting for a Response
A forensic look at concurrency, cold starts, compute-resolver, AI Gateway waiting time plus the cost difference at 1M RPS.
Figma's Multiplayer Editor: The Server That Decides Who Wins
A practical teardown of WebSocket collaboration, Rust isolation, conflict resolution plus the hidden price of an always-live canvas.
The Workspace That Ate the Warehouse
A forensic teardown of Notion's block database, 480 logical shards, CDC pipeline, vector search plus modeled cloud bill.
Rethinking Control Planes: Cell-Based Architecture
A control-plane redesign focused on regional isolation, failure containment, Raft plus zero-blast-radius operations.
Tech Layoff Radar
Open live tracker- India737
- United States171
- United Kingdom28
- Singapore11
- Canada9
- Others71
Country mix, daily activity and full history on the live tracker page. Nine engineering instruments live on the calculators page: token bill, error budgets, HPA sizing and six more. No tracking, no backend.