Index
Case studies
Engineering writeups in depth. Sanitized to remove anything customer- or employer-specific.
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NestJS · TypeScript · PostgreSQL
Building the backend half of surveys
While looking into SurveyJS for a new product at Evolute, I kept encountering the same missing features: versioning, partial saves, analytics, and webhooks. I created it as a standalone open-source NestJS service.
12 min read
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AI · LLM · Azure OpenAI
Shipping LLM features end-to-end on Azure OpenAI
Notes from building a multi-language summarization pipeline on Azure OpenAI: provider abstraction, multi-region failover, structured outputs, function calling, and the cost telemetry that kept us honest.
9 min read
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MongoDB · Performance · Postmortem
How a `$nin` query took down a hot read path
A B2B SaaS I work on saw router pools saturate and p95 pin at 30 seconds. The trigger was one query on one collection. The amplifiers were everywhere. This is the walkthrough.
8 min read