Staff Web Engineer (Streaming Player) — Coupang Play

About Coupang Play Coupang Play is an OTT video streaming service. We offer a wide range of content, including Original Series, TV Shows, Movies, and Sports. We are in the business of delivering exceptional storytelling. We produce award-winning scripted and unscripted Original Series, such as “Boyhood”, “Anna”, and “SNL Korea”. We believe Sports can also be elevated by creative storytelling. Play is now an authoritative destination for Sports, broadcasting K-League, La Liga, Bundesliga, F1, NFL, and other leading leagues and tournaments. We also offer some of the latest movies that were just released in local theaters, bringing more exceptional storytelling to our Customers. To ensure that we deliver the content seamlessly, we invest in Engineering, Product, and Design. Coupang Play is available on all mobile devices, tablets, PC, Smart TV, Apple TV, and Android TV. Our teams keep optimizing how Customers discover and stream both VOD and Live content. That includes investments in frontend, backend, and infrastructural developments. We also embrace Machine Learning to refine our CX. We are still very early in our growth stage. If you enjoy solving complex problems using industry-leading technology or unconventional business approaches, please join us. We are building a world-class team of problem-solvers, all dedicated to delivering exceptional storytelling to our Customers. About the team The Streaming Player and Experience team is responsible for building and optimizing the end-to-end playback experience. We ensure an intuitive, stable and consistently immersive viewing experience by owning the client-side playback pipeline – from the core player engine to user-facing features. Our team collaborates closely with video infrastructure, product, and design to deliver a consistent and delightful experience across browsers, Smart TVs, and other web-based platforms. Role Overview As a Staff Web engineer in the Streaming Player and Experience team, you will help design and evolve the playback app service that powers our web-based streaming experience across web browsers, Smart TVs, and Chromecast web receiver. Your focus will be on building advanced playback features -- such as live time-machine, and multi-view. You will also be responsible for continuously improving playback performances through metric-driven iteration and technical deep dives. You will play a key role in shaping the playback architecture to meet current product needs while ensuring long-term flexibility, enabling a differentiated and immersive viewing experience. What you will do Architect and evolve core components of the playback app service to support feature expansion, modularity, and platform consistency. Improve startup time, rebuffering, ABR logics, and other playback KPIs through technical deep dives and iterative improvements. Work cross-functionally with the streaming pipeline and product teams to provide users with the best streaming quality and user experience. Define and monitor real-time streaming metrics at high-profile live streaming events, and give technical guidance to live operation teams. Basic Qualifications Bachelor’s degree and 7+ years of professional software development experience with strong JavaScript and TypeScript skills. Experience with A/B testing and metrics analysis. Ability to design scalable architecture, to write clean, testable, efficient code, and to measure performance. Strong verbal and written communication and collaboration skills. Preferred Qualifications Experience with media codecs (AAC, AVC, HEVC, or AV1) and streaming protocols (HLS, DASH). Expertise in video streaming players such as Shaka, video.js, dash.js, or hls.js. Experience with web security and network security. Expertise in digital rights management (DRM) such as Widevine, Fairplay and PlayReady. Recruitment Process and Others Recruitment Process Application Review > 1st Tech Coding Interview > 2nd Tech Coding Interview > Offer ... (truncated, view full listing at source)