Senior Vanilla JavaScript Developer
New
Based in the United States, U.S.-aligned teamsFull-TimeSenior
Salary not disclosed
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Job Details
- Languages
- English
- Experience
- 5+ years
- Required Skills
- GitHTMLCSSJavascriptRESTful APIs
Requirements
- 5+ years of professional front-end development experience
- Expert-level proficiency in Vanilla JavaScript (ES6+) and deep understanding of core language concepts (closures, scope, prototypes, event loop, async patterns)
- Strong experience with semantic HTML5, advanced CSS3, and responsive design principles
- Experience integrating front-end applications with RESTful APIs and real-time communication systems
- Familiarity with modern build tools such as Webpack, Babel, Rollup, or Vite
- Experience with Git and collaborative development workflows
- Strong English communication skills and experience working with distributed, cross-functional teams
- Ability to work independently while collaborating effectively with U.S.-based clients and stakeholders
- Experience with testing frameworks (Jest, Playwright, Cypress), TypeScript, or Node.js is a plus
- Exposure to Web Components, CI/CD pipelines, or cloud environments is a bonus
Responsibilities
- Design and build large-scale, framework-agnostic web applications using Vanilla JavaScript (ES6+), HTML5, and CSS3
- Develop reusable UI components and maintain clean, modular, and efficient codebases
- Optimize application performance, responsiveness, accessibility, and Core Web Vitals metrics through advanced DOM and browser API techniques
- Integrate front-end applications with REST APIs, WebSockets, and backend services
- Collaborate with designers, product managers, engineers, and client teams to deliver high-quality user experiences
- Conduct code reviews and mentor junior developers, promoting best practices and engineering excellence
- Implement automated testing strategies and contribute to CI/CD pipelines to ensure reliable deployments
- Troubleshoot and resolve complex browser compatibility, performance, and scalability issues
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