javascript

Javascript

react

ReactJS

node

NodeJS

Docker is a set of platform as a service (PaaS) products that use OS-level virtualization to deliver software in packages called containers

docker

Docker

SQL is a domain-specific language used in programming and designed for managing data held in a relational database management system

PostgresSQL is a free and open-source relational database management system (RDBMS) emphasizing extensibility and SQL compliance. 

Postgressql

PostgresSQL

typescript

TypeScript

Develop and maintain iOS mobile applications using UIKit and SwiftUI · Design and implement new features, optimize and refactor existing code

swift

Swift (IOS Developer)

python

Python

soft-skills

Soft Skills

Frontend System Design is a hard skill—it’s about technical architecture.
But it’s evaluated alongside soft skills (communication & trade-off reasoning).
App architecture & state strategy (SPA/MPA, SSR/ISR, microfrontends)
Performance budgets, caching, CDN/edge, code-splitting
API contracts, schema/versioning, error handling & resiliency
Design system architecture, accessibility, i18n
Testing strategy, observability, security, and deployments

frontend-system-design

Frontend System Design

Check your abilities and showcase the expertise in JavaScript coding with our platform, join us to  take the JavaScript knowledge to the next level!

Basics

Comparisons

Type casting

nullish coalescing

modules

Promises, async/await

Event Loop

Algorithms

Prototypes

Objects

ES2022

Patterns

Array

Memory management

Closures

setTimeout()

Destructuring assignment

IIFE

Local & Session storages

call, apply, bind

Data types

Functions

classes

variable declaration

spread

variables

loops

HTML

HTML: Events

type coercion

CORS

Symbol

Expressions and operators

decorators

theory

Map/Set

generators

Code examples

String

import()

Rest parameters

Symbol.iterator

Express test JavaScript: Junior level

Express test JavaScript: Middle level

Express test JavaScript: Senior level

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Javascript (4)

Express test JavaScript: Junior level

Express test JavaScript: Middle level

Express test JavaScript: Senior level

Quick check JS knowledge