Mayflower is a technology company building highload products used by millions of people worldwide. Operating at the scale of one of the world's top-50 websites, we solve complex engineering challenges and create solutions that power real-time entertainment for a global audience.

We’re hiring a Senior Frontend developer into two teams: the Product team, focused on building new features and improving user experience, and the Technical team, responsible for system architecture, performance, scalability, and fault tolerance. You’ll join one of these teams depending on your strengths and interests.

Job Responsibilities

• Design and implement new functionality for the website and core applications, including performance optimization and enhancement of existing features.
• Continuously improve code quality by refactoring legacy code, resolving performance bottlenecks, and aligning the codebase with modern standards and best practices.
• Participate in the design and implementation of scalable and efficient architectural solutions, including modularization of the codebase and development of fault-tolerant systems for high-load environments.
• Write and maintain unit and integration tests, support ongoing maintenance of existing features, and ensure stability across deployments.
• Identify and resolve security vulnerabilities; support the integration and migration to new API interfaces.
• Research and evaluate new technologies for possible integration; maintain and update shared libraries to align with evolving technical standards.

You’ll thrive here if you have

• 6+ years of experience and knowledge of JavaScript: React.js, Vanilla JS, Event Loop, Scope, Context, Prototype, Server-side render, Isomorphic Application;
• Proficiency in HTML5, CSS, Post & Pre Processing CSS;
• Experience in creating Single Page Applications on React/Preact/Hyperapp and TypeScript;
• Understanding of the principles and operation of AJAX, WebSockets, CORS security policies;