Welcome to frontend development. When we build an app, we generally think like -

• React vs Angular

• Zustand vs zustand

• Tailwind vs Bootstrap

But we forgot the main thing that is architecture. If we don't follow architecture, good code becomes messy over time. This decision is more improtant that chossing tech stack.

Today we will discuss some most common frontend architectures you have to know if you want to be experenced frontend developer.

1. MVC - The Classic Approach

MVC stands for -

• M -> model

• V -> View

• C -> Controller

When the user clicks something, its basiclly

controller handles it-> model updates -> view changes

This is mostly used in traditional web development like Django, Rails, or Laravel.

When is it good?

• When your backend does most of the work.

• When Pages load on every request.

• when seo is important

It's simple and stuecter but it's not flexible for modern apps; it's hard to scale the frontend independently.

2. SPA - Single Page Application

This is what most modern apps use.

The browser loads one page, and after that, everything happens with JavaScript.

No reload on every request. It just feels instant when moving between two pages.

Why do people love it?

• Very smooth experience.

• Highly interactive.

• clear separation of frontend and backend.

If you are building something like a dashboard or learning platform, SPA makes sense.

The downside:

• SEO can be tricky

• State management can get complicated

• Big Js bundle

Most modern SaaS dashboards — like Stripe Dashboard or Notion — follow the SPA model using frameworks like React or Vue.

3. BFF – Backend for Frontend

Now, suppose you have a web app, a mobile app, etc.

If all are talking to the same server/backend, things are getting messy. So you can create a backend layer just for each frontend.

Web -> Web BFF
Mobile -> Mobile BFF

When is this useful?

• When you have multiple client apps

• When using microservices.

Companies like Netflix and Amazon use BFF-style architecture to tailor APIs for web and mobile clients.

4. SSR, SSG, ISR (Rendering Styles)

Now lets about how HTML is generated.

SSR - Server-side Rendering

The server generates HTML every time someone visits.

Good for:

• E-coomerce

• SEO-heavy websites

It's dynamic but slightly heavier. Great for

SSG - Static Site Rendering

Pages are generated at build time.

• Very fast

• Very secure

• Very cheap to scale

perfect for:

• Blogs

• Landing Page

• Documentetion

ISR - Hybrid

Static Pages can be updated in the background

It's a hybrid approach when you need to build large content sites and update them frequently.

5. Modular Frontend Monolith (Very Practical)

This is my favorite for startups.

Instead of splitting into many small frontend apps, you keep:

• one codebase

• one deployment

• one application

For example:

auth/
dashboard/
exams/
certificates/

Each feature lives in its own folder. Each feature owns its logic.

Everthing feature owns its logic.

Many early startups begin with this architecture before splitting into microservices.

Important Note

These patterns are not competing choices.

In real applications, they are often combined together.

For example:

Rendering style → SPA
Frontend structure → Modular Monolith
Backend architecture → BFF

Different parts of the system solve different problems.

So, Which One Should You Choose?

You saw different types architectures. But the real truth is, there is no Best architecture.

It depends on:

• Team size

• Product complexity

• SEO needs

• Groth plans

If you are building:

Marketing website → SSG
Dashboard application → SPA
Multi-client platform → BFF
Startup SaaS product → Modular Monolith

This is the basic idea you can get from which architecture you need.

start simple

Scale when needed

Don't over-engineer early

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