Tutorials
Learn to build SaaS.
Practical tutorials on building modern web applications.
11 min read
Streaming Structured Output from Anthropic and OpenAI APIs to a Next.js UI
Production pattern for streaming JSON schemas from LLM APIs into a Next.js UI, handling Anthropic and OpenAI differences without the blank-screen wait.
nextjsaitypescript
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10 min read
Observability with OpenTelemetry: Distributed Tracing Across Next.js, FastAPI, and Django
Instrument three-tier stacks with OpenTelemetry. Propagate trace context across service boundaries and ship spans to your own collector.
nextjsfastapidjango
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11 min read
Feature Flags and Progressive Rollouts in a Django + FastAPI + Next.js Stack
Production-ready feature flag implementation across Django, FastAPI, and Next.js. Covers bucketing, cache invalidation, and safe rollout workflows with working code.
djangofastapinextjs
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13 min read
Idempotent Webhook Processing: Deduplication and Retry Handling in FastAPI and Next.js
Production-ready webhook handling with deduplication and retry logic in FastAPI and Next.js. Prevent duplicate charges and handle partial failures robustly.
webhooksfastapinextjs
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11 min read
Astro for Content-Heavy Sites: Islands, Partial Hydration, and When to Choose It Over Next.js
Why Astro's zero-JS-by-default architecture outperforms Next.js for marketing sites and docs. Islands architecture, hydration strategy, and the trade-offs explained.
nextjsperformance
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9 min read
Idempotency and Retry Patterns for Payment Webhooks (Stripe) in Next.js and FastAPI
Build production-grade Stripe webhook handlers in Next.js and FastAPI that survive retries without double-charging customers. Idempotency keys and deduplication patterns explained.
webhooksfastapinextjs
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12 min read
Streaming LLM Responses from FastAPI to Next.js with the OpenAI and Anthropic APIs
End-to-end streaming setup for OpenAI and Anthropic APIs across FastAPI and Next.js. Cover backend generators, SDK differences, error handling, and production patterns.
fastapinextjsai
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