Tutorials
Learn to build SaaS.
Practical tutorials on building modern web applications.
13 min read
Managing Cost and Token Budgets for LLM APIs in Production: Caching, Batching, and Fallback Models
Treat LLM spend like database load. Build routing, caching, and cost controls into your request path from day one—not as an afterthought.
aiperformance
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10 min read
Setting Up a CLAUDE.md File on a Real Full-Stack Repo
Set up Claude Code context files that persist across sessions. Load architecture decisions, conventions, and polyglot rules once—then let AI assistants reference them automatically.
aiautomationtypescript
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12 min read
Deploying FastAPI and Next.js to AWS App Runner vs. ECS Fargate: When Managed Wins
Senior engineer's honest breakdown: App Runner for solopreneurs and small teams, ECS Fargate when you need control. Real tradeoffs, no hype.
awsfastapinextjs
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14 min read
The N+1 Query Problem: How to Spot It and Fix It in Django and SQLAlchemy
How the N+1 query problem silently tanks production performance, why it's invisible in dev, and concrete fixes for Django and SQLAlchemy.
djangoperformancepostgres
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13 min read
AWS Cost Optimization for a Dockerised Stack: Right-Sizing ECS, Fargate Spot, and Egress Traps
Right-size ECS, use Fargate Spot, avoid egress traps. Production checklist from 25+ years of SaaS infrastructure decisions.
awsdockerperformance
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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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