REQUIREMENTS:

• Experience configuring Webpack, Vite, or Rollup from scratch, including writing custom plugins
• Confident use of Chrome DevTools (performance, memory profiling)
• Solid understanding of Core Web Vitals and how embedded components affect SEO
• Knowledge of CSS encapsulation techniques and working with Shadow DOM
• Strong grasp of Same-Origin Policy, CORS, CSP, and postMessage communication
• Experience working with iframes, including sandbox attributes and various loading scenarios
• Proven experience developing browser extensions
• Excellent command of native JavaScript (ES6+), including async/await and the Event Loop

WOULD BE A PLUS:

• Experience with video streaming technologies such as HLS or MPEG-DASH
• Understanding of hybrid environments (Electron, Web Workers, IPC)
• Front-end performance optimization (load speed, rendering, memory usage)
• Reverse engineering skills

RESPONSIBILITIES:

• Develop and maintain embeddable JavaScript components (iframes, scripts, players)
• Configure and manage project bundlers (Webpack, Vite, Rollup) for complex setups
• Implement style isolation techniques (CSS encapsulation, Shadow DOM)
• Debug and profile performance, including production-level troubleshooting
• Ensure security compliance: CORS, CSP, sandbox, postMessage
• Optimize embedded solutions for SEO and Core Web Vitals
• Build and maintain browser extensions
• Test across different browsers and environments
• Document technical solutions and best practices

WE OFFER:

• Competitive salary
• Friendly and results-oriented team
• Career growth opportunities
• Paid vacation (20+ working days per year) and sick leave
• Corporate English classes
• Medical insurance