Tutorials
Learn to build SaaS.
Practical tutorials on building modern web applications.
10 min read
WebSockets in FastAPI and Next.js: Scaling Real-Time Connections Behind a Load Balancer
Build production WebSocket architectures that survive load balancers. Protocol fundamentals, connection management, authentication, and horizontal scaling without message loss.
fastapinextjsperformance
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13 min read
React Router v7 as a Framework: Migrating from Remix and Choosing It Over Next.js
Why React Router v7's three modes make it a genuine Next.js alternative. Architecture decisions from 25 years of production experience.
reactnodejstypescript
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10 min read
Health Checks, Graceful Shutdown, and SIGTERM Handling for FastAPI and Next.js Containers on ECS
Production patterns for health checks, SIGTERM handling, and graceful shutdown in containerised FastAPI and Next.js services on AWS ECS—edge cases included.
fastapinextjsaws
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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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