Frontend/Fullstack Engineer (Senior)

About the Position

We are seeking a Frontend/Fullstack Engineer (Senior) with proven experience developing video players and integrating ads according to IAB standards. This role is remote and part-time (4 hours/day).

Responsibilities

• Develop and maintain video players using HTML5, JavaScript, and TypeScript.
• Integrate ads using VAST, VPAID, and VMAP standards.
• Work with Video.js or hls.js for video playback.
• Implement SSAI (server-side ad insertion) and embed players in mobile apps using Flutter WebView.
• Understand and work around iOS limitations and cross-browser autoplay specifics.

Requirements

• HTML5, JavaScript (ES5, ES6) (including prototypal inheritance and working with the HTMLMediaElement API), TypeScript
• HLS / DASH / MSE
• VAST / VPAID / VMAP
• Experience with Video.js or hls.js
• SSAI (server-side ad insertion)
• Flutter WebView (embedding a player in a mobile app)

Nice to Have

• Node.js and basic DevOps (Docker, CI) for ad-tech integration: VAST proxy, self-hosted ad scripts, server-side VMAP build
• Header bidding / Prebid (client or server)
• Understanding of CDN and content delivery (signed URLs, tokens, segment cache)
• DRM (Widevine / PlayReady / FairPlay)

Format

• Remote, part-time (4 hours/day)