Next.js Course in Pune with Placement

Next.js from the App Router up. Cover project setup, the file-based routing convention (app directory, layouts, pages, loading.tsx, error.tsx, not-found.tsx), parallel routes and intercepting routes (the patterns most institutes skip but real product teams use), nested layouts, route groups, plus the dev / build / start workflow with Turbopack as the default bundler. By the end of week 2 every student has a multi-page Next.js 16 app with proper layouts and routing.

The App Router beyond folders and `page.tsx`. Route groups for organising files without affecting the URL — the mechanism behind having separate marketing and application layouts in one project. Templates versus layouts, and the specific difference that matters: a layout persists across navigation, a template remounts.

Parallel routes render several independent pages into one layout, which is how a real dashboard with independently loading panels is built. Intercepting routes are what produce the modal-over-a-feed pattern that has a real, shareable URL — the Instagram photo-modal behaviour — and they are genuinely hard to reason about until someone shows you the folder convention.

The biggest mental-model shift from pages-router Next or pure React. Cover the Server vs Client Component boundary (the discipline of `'use client'`), what runs where (the server vs client serialisation rules), the Suspense + streaming model, async Server Components fetching data without hooks, the React 19 `use` API for promise / context unwrapping in Server Components. Plus the discipline of structuring an app as 'mostly Server Components, Client Components only where needed' — the inversion of the React-mental-model that Next.js demands.

The area Next.js 14 / 15 redesigned, where most production bugs live. Cover the fetch() extension with `cache` and `next.revalidate`, the four caching layers (Request Memoisation, Data Cache, Full Route Cache, Router Cache), `revalidatePath` / `revalidateTag` for on-demand revalidation, the new explicit-cache defaults of Next.js 15+, plus dynamic vs static rendering and Partial Prerendering (PPR). We finish with a real product-style data-fetching pattern — list page (static + ISR), detail page (dynamic per request), action that revalidates both.

The single most misunderstood part of Next.js, and the source of most "why is my data stale" bug reports. The caching layers are separated explicitly — request memoisation, the data cache, the full route cache, and the client router cache — because they have different lifetimes and different invalidation rules, and conflating them is what produces the confusion.

You then control them deliberately: cache lifetimes, tag-based invalidation with `revalidateTag`, path revalidation, opting routes into dynamic rendering, and reading the build output to see which routes were static and which were not. The rule taught throughout is to make caching an explicit decision rather than something that happens to you.

Server Actions replace REST APIs for most CRUD work in Next.js apps. Cover the syntax (`'use server'` exports), inline vs separate-file actions, FormData handling, progressive enhancement (forms work without JS), error handling with the React 19 `useActionState` and `useFormStatus` hooks, the `useOptimistic` hook for optimistic UI, plus Zod-based input validation. The honest discussion: when Server Actions earn their place vs when traditional REST API routes are the right tool.

Next.js as a backend, which for a large share of applications is the whole backend. Route handlers — the request and response objects, HTTP methods, dynamic segments, streaming responses and runtime selection between Node and edge.

The architectural framing is backend-for-frontend: an API layer shaped for this application rather than a general-purpose service, which is what makes it worth writing in the same repository. You cover input parsing and validation, consistent error responses, status codes, webhooks with signature verification, and — importantly — when you should not build the backend here and should call a separate service instead.

Production-grade integrations. Authentication with Auth.js (NextAuth) v5 — the dominant Pune choice — covering JWT vs database sessions, OAuth (GitHub / Google / Azure AD), credentials provider, plus the Middleware pattern for route protection. Database — PostgreSQL with Drizzle ORM (the 2026 favourite TypeScript-native ORM in Pune product teams), connection pooling for serverless / edge runtime constraints. Plus production patterns — environment variables, the Vercel deployment story, edge vs Node runtime selection, ISR with PPR.

The request-level layer and the hardening that production requires. Middleware runs before a request is handled — the right place for redirects, locale detection, A/B assignment and coarse auth checks, and the wrong place for database work, which is a mistake with a very visible latency cost.

Security covers what actually applies to a Next.js application: XSS and where React does and does not protect you, CSRF in the context of Server Actions, injection through unvalidated input, secure cookie configuration, and the `server-only` boundary that keeps secrets out of the client bundle. Content Security Policy is set up with nonces properly rather than disabled because it broke something.

The features every real product needs and no tutorial covers together. File uploads done properly — presigned URLs to object storage rather than routing bytes through your server, validation, size limits and image processing. Transactional email with a provider, templates, and the deliverability basics that decide whether your mail reaches an inbox.

Payments cover the checkout flow, webhook-driven fulfilment and idempotency — with the standing rule that you never trust the client to tell you a payment succeeded. Real-time closes the module: Server-Sent Events, WebSocket options, polling as a legitimate choice, and streaming AI responses, which is now a common requirement.

Next.js's performance story is the reason Pune product teams choose it. Cover Core Web Vitals (LCP, INP, CLS) and how Next.js's defaults help / hurt each, the Image component for automatic optimisation, Font optimisation with `next/font`, Script component for third-party scripts, the Metadata API for SEO (replacing the old Head pattern), structured data with JSON-LD, plus the Lighthouse + PageSpeed Insights workflow that signals 'this engineer cares about performance' on Pune product hiring panels.

How you test an application whose components run in two different places. Unit tests with Vitest for pure logic; component tests with Testing Library for client components; and the honest position on Server Components, which are awkward to unit-test today and are better covered by end-to-end tests — a limitation worth stating plainly rather than pretending around.

Route handlers are tested as the API they are. End-to-end testing with Playwright covers the flows that matter — sign-in, checkout, form submission — and the module closes on test data strategy, mocking external services, and running the suite in CI so it actually protects the main branch.

Getting it live, on more than one kind of infrastructure. Vercel first because it is the reference deployment and everything works; then self-hosting honestly, because plenty of Pune employers run on their own infrastructure and need someone who knows what Next.js requires outside Vercel — the Node server, the standalone output mode, and which features need extra work.

Docker covers multi-stage builds and small production images. CI/CD covers a pipeline that lints, tests, builds and deploys on merge, with preview deployments per pull request. Environment variables, secrets and configuration per environment run throughout.

How a Next.js codebase is organised so it survives its second year. A data access layer that every Server Component and route handler goes through, so authorisation is enforced in one place rather than repeated in twelve; repository patterns; and keeping domain logic out of route files.

Observability covers structured logging, error tracking and web-vitals reporting from real users. The module closes on the Pages Router — still running in a great many production applications — what differs, and how an incremental migration to the App Router is actually carried out, since "maintain and migrate an existing Next.js application" is a real Pune job description.

One week of full-time capstone work plus structured interview preparation. Pick one of three capstone projects (see Capstone Projects). Mock interviews calibrated for Pune Next.js hiring panels — Persistent, BMW TechWorks, Mastercard Pune Tech Hub, Amagi, Fyllo, BharatPe, Razorpay. Includes a Server Components / Server Actions whiteboard round (the most common 2026 senior interview question), a caching / revalidation scenario round, and a behavioural round. Resume / LinkedIn / GitHub polish included.