📖 Vercel SE Technical Study Guide

22 chapters across 7 parts — from platform fundamentals to interview preparation. Click any chapter to read the full content.

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Part I: Role & Platform Foundation

What the Role Actually Is

Day-to-day SE activities, technical discovery, architecture design, code audits, and the business-technical duality

The Vercel Platform — Mental Model

The four-layer model: DX, Compute, Edge Network, AI Cloud. Core value proposition and key company facts

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Part II: Build, Deploy & Serve

The Build Pipeline & Deployment Model

Git push → build → deploy flow, branch previews, deployment protection, Turbopack (700× faster)

Preview Deployments

Live PR previews for design reviews, QA, client approvals. GitHub/GitLab integration with PR comments

Compute — The Three Runtimes

Edge Runtime vs Serverless vs Static. Limits, use cases, and the comparison matrix

Fluid Compute — The 2025 Game Changer

Concurrent request handling, Active CPU pricing, streaming cost reduction, bytecode caching

Edge Network & CDN

Global PoPs, cache hierarchy, Cache-Control headers, Skew Protection for zero-downtime deploys

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Part III: Next.js Framework Mastery

Next.js Rendering Strategies

SSG, ISR, SSR, RSC — full code examples, decision matrix, and when to use each strategy

Caching — The Most Important Topic

Four cache layers, fetch() cache, on-demand revalidation, unstable_cache, anti-patterns

Middleware & Routing

Edge middleware for auth, A/B testing, geo-routing. What middleware should and should NOT do

Core Web Vitals

LCP, CLS, INP deep dives with Next.js fixes. SEO impact and performance optimization

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Part IV: Platform Services

Edge Config & KV Storage

Feature flags, Vercel KV (Redis), Blob storage, Postgres. Ultra-low latency reads at the edge

Observability

Speed Insights, RUM data, OpenTelemetry, log drains. Core Web Vitals measurement and alerting

Security — WAF, DDoS, Access Control

Managed WAF, DDoS mitigation, deployment protection, env vars, SOC 2/HIPAA/PCI compliance

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Part V: AI Cloud

The AI Cloud Layer

AI SDK, Agent abstraction, use-workflow, AI Gateway, Sandbox, v0, and Fluid Compute cost benefits

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Part VI: Architecture & Business

Composable Architecture

Headless CMS + ISR pattern, commerce patterns, the composable stack with best-of-breed services

Common Customer Architectures

E-commerce, media/publishing, SaaS dashboard, and AI application architecture diagrams

Migration Patterns

CRA → Next.js, Gatsby → Next.js, self-hosted → Vercel, Pages Router → App Router

Pricing Model — In Depth

Hobby/Pro/Enterprise plans, cost growth triggers, spend management, upgrade trigger points

Enterprise Features

99.99% SLA, SAML SSO + SCIM, multi-region compute, audit logs, custom WAF rules, log drains

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Part VII: Interview Preparation

SE Interview Topics & Common Questions

7 discovery questions, 5 technical interview Q&As with full answers, 8 codebase red flags

Glossary

25 key terms defined — DX Platform, Fluid Compute, ISR, RSC, Skew Protection, MACH, and more