The Writing
Field notes on systems & AI
Long-form essays on production architecture, shipping LLM features under real constraints, and 14+ years of lessons from fintech at scale.
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inbound ──▶ Twilio ──▶ realtime
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< 90sAI SystemsJul 1, 2026·6 min read
Shipping AI Voice Agents That Resolve Calls in Under 90 Seconds
Lessons from putting GPT-4o on live phone lines — why the 90-second target is a conversation-design problem, what turn-taking actually costs, and the guardrails and observability that earn production trust.
Read articleArchitectureApr 28, 2026·2 min read
Cutting API Latency 50% Without Rewriting the System
How we re-shaped a credit bureau's core microservices to handle 3× peak volume — caching strategy, service boundaries, and the measurements that actually mattered.
Read articleFintechApr 9, 2026·2 min read
Zero Data Loss: Migrating Millions of Credit Records
A field guide to reconciliation, dual-writes, and the verification harness that let us sleep through a legacy migration of consumer credit data.
Read article