Hire VanillaJS developers

Hiring Guide: Vanilla JS Developers

Looking to hire Vanilla JS developers? Vanilla JavaScript refers to plain, framework-free JavaScript — the foundational programming language of the web. Skilled Vanilla JS developers have a deep understanding of core browser APIs, DOM manipulation, and modern ES6+ syntax, enabling them to build fast, lightweight, and framework-agnostic web applications. Whether you’re optimizing an existing codebase or developing a new web project, hiring a Vanilla JS expert ensures performance, stability, and flexibility.

Why Hire Vanilla JS Developers?

Hiring Vanilla JS developers gives your project maximum control over performance, compatibility, and scalability without relying on external frameworks or libraries. These developers write efficient, maintainable code that interacts directly with the DOM and browser environment. They’re particularly valuable for teams that want lean, dependency-free solutions or need to optimize for speed and reduced bundle size.

Core Responsibilities of Vanilla JS Developers

 
• Build and maintain interactive, framework-free web applications using pure JavaScript.
 
• Implement DOM manipulation, event handling, and dynamic content rendering without frameworks.
 
• Optimize performance, load times, and rendering across devices and browsers.
 
• Develop reusable JavaScript modules and maintain modular architecture for scalability.
 
• Integrate RESTful and GraphQL APIs using native Fetch or XMLHttpRequest.
 
• Collaborate with designers to create responsive, accessible, and interactive UIs.
 
• Write clean, maintainable, and well-documented code following modern JavaScript standards.

Key Technical Skills to Look For

 
• Languages: JavaScript (ES6+), HTML5, CSS3.
 
• APIs: DOM, Fetch API, Web Storage, WebSockets, Canvas, and Service Workers.
 
• Performance Optimization: Code splitting, lazy loading, debouncing, and throttling.
 
• Testing: Jest, Mocha, Jasmine, or native browser test automation.
 
• Tooling: Webpack, Babel, ESLint, and Prettier for code quality and builds.
 
• Version Control: Git, GitHub, GitLab, or Bitbucket.
 
• Security: XSS prevention, CSP policies, and input validation.
 
• Accessibility: ARIA roles, keyboard navigation, and semantic HTML integration.

When to Hire Vanilla JS Developers

 
• When building fast, dependency-free websites that don’t require large JavaScript frameworks.
 
• When optimizing existing codebases to reduce bundle size and improve performance.
 
• When maintaining legacy systems built without modern frameworks.
 
• When building core functionality for front-end frameworks or libraries.
 
• When improving browser-level scripting, animations, and user interaction logic.

How to Hire the Right Vanilla JS Developer

1. Define Your Application Requirements

Determine whether your project requires core DOM manipulation, performance optimization, or API integration. Vanilla JS developers can focus on low-level front-end logic or full-featured application development.

2. Evaluate Technical Mastery

A great Vanilla JS developer understands how browsers work under the hood — from event loops to rendering pipelines. Review their GitHub repositories or code samples to evaluate their proficiency with ES6+, asynchronous JavaScript (Promises, async/await), and API integrations.

3. Interview Questions

 
• How does JavaScript handle asynchronous code execution?
 
• What’s the difference between var, let, and const?
 
• Explain how the JavaScript event loop works.
 
• How would you optimize a webpage with large DOM elements for faster rendering?
 
• What are closures, and how are they used?
 
• How do you handle browser compatibility and polyfills?

4. Technical Assessment

Assign a coding task where the developer builds a small interactive widget using only Vanilla JS (e.g., a to-do app or a drag-and-drop interface). Evaluate their problem-solving skills, code structure, and DOM manipulation techniques.

Average Cost of Hiring Vanilla JS Developers

The cost depends on experience and project complexity:

 
• Junior Developers (1–3 years): £25–£45/hour
 
• Mid-Level Developers (3–6 years): £50–£75/hour
 
• Senior Developers (7+ years): £80–£120/hour

Through Lemon.io, you can hire pre-vetted Vanilla JS developers who write clean, optimized, and framework-independent JavaScript code tailored to your business needs.

Why Hire Through Lemon.io?

Lemon.io connects you with expert Vanilla JS developers who understand the fundamentals of modern web development without relying on frameworks. Our developers focus on performance, scalability, and clean coding standards to deliver lightweight, efficient, and maintainable solutions.

Hire Expert Vanilla JS Developers →

Related Skills

 
• Hire JavaScript Developers – Build dynamic, interactive, and modern web applications.
 
• Hire Frontend Developers – Enhance UI/UX and ensure responsive, accessible design.
 
• Hire React Developers – Scale your applications with component-based architecture.
 
• Hire Vue.js Developers – Develop reactive, performant user interfaces with Vue.
 
• Hire TypeScript Developers – Improve code reliability with static typing and modern tooling.

FAQs About Hiring Vanilla JS Developers