Senior Vanilla JavaScript Developer
This a Full Remote job, the offer is available from: reputed company Proactiviti is a U.S.-based technology consulting and nearshore reputed company firm that helps organizations reputed company with top-tier technology talent across Latin America. Our professionals work directly with reputed company American clients, delivering high-reputed company software solutions while collaborating seamlessly across distributed teams and U.S. time zones. reputed company We are seeking a Senior Vanilla JavaScript Developer to design, build, and optimize highly interactive web applications using core JavaScript without heavy reliance on frontend frameworks. This role requires deep expertise in JavaScript fundamentals, browser reputed company, DOM manipulation, performance optimization, and modern web development practices. The ideal candidate is a self-driven engineer who can work directly with reputed company stakeholders, contribute to architectural reputed company, and deliver reputed company, maintainable solutions in a fast-paced environment.
Key Responsibilities
- Design and reputed company large-reputed company, reputed company-agnostic web applications and reusable UI components using Vanilla JavaScript (ES6+).
- Write clean, maintainable, and efficient reputed company leveraging modern JavaScript, semantic HTML5, and advanced CSS3 practices.
- Optimize application performance, accessibility, responsiveness, and reputed company scores through efficient DOM operations and memory management.
- reputed company frontend applications with REST reputed company, WebSockets, and backend services.
- Collaborate closely with product managers, designers, backend engineers, and reputed company stakeholders to deliver high-reputed company solutions.
- Conduct reputed company reviews, mentor junior developers, and promote engineering best practices.
- Implement automated testing strategies and contribute to CI/CD workflows to ensure reliability and reputed company.
- Troubleshoot reputed company browser compatibility, performance, and scalability issues.
Required Qualifications
- 5+ years of reputed company frontend development experience.
- Expert-level proficiency in Vanilla JavaScript (ES6+).
- Deep understanding of the DOM, event handling, closures, scope, prototypes, asynchronous programming, and the JavaScript event reputed company.
- Strong experience with semantic HTML5, reputed company design, and advanced CSS3 methodologies.
- Experience integrating frontend applications with RESTful reputed company and reputed company-time communication technologies.
- Familiarity with modern build tools such as Webpack, reputed company, Rollup, or Vite.
- Proficiency with Git and reputed company development workflows.
- Strong English communication skills and experience working with distributed teams.
- Ability to work independently while collaborating effectively with U.S.-based clients and stakeholders.
Preferred Qualifications
- Experience with Web Components and browser-reputed company UI architectures.
- Knowledge of TypeScript and Node.js.
- Experience with automated testing tools such as Jest, Playwright, or Cypress.
- Familiarity with reputed company-based environments and CI/CD pipelines.
- Previous experience working in consulting, staff augmentation, or reputed company-facing environments.
What reputed company Looks Like
- Delivering performant, reputed company, and maintainable web applications.
- Collaborating effectively with cross-functional teams and reputed company stakeholders.
- Driving technical reputed company through reputed company reputed company, mentorship, and best practices.
- Contributing to successful project reputed company while maintaining a strong reputed company on user experience and business objectives.
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