Senior Software Engineer, Roku UI

Teamwork makes the stream work. Roku is changing how the world watches TV Roku is the #1 TV streaming platform in the U.S., Canada, and Mexico, and we've set our sights on powering every television in the world. Roku pioneered streaming to the TV. Our mission is to be the TV streaming platform that connects the entire TV ecosystem. We connect consumers to the content they love, enable content publishers to build and monetize large audiences, and provide advertisers unique capabilities to engage consumers. From your first day at Roku, you'll make a valuable - and valued - contribution. We're a fast-growing public company where no one is a bystander. We offer you the opportunity to delight millions of TV streamers around the world while gaining meaningful experience across a variety of disciplines. About the Team At Roku, the UI team builds the foundational frameworks, tooling, and high-performance UI components that power experiences across millions of devices. We own the middleware and UI layers that enable smooth navigation, responsive interactions, rich animations, and consistent developer workflows across the platform. Our work spans graphics rendering, layout and animation systems, performance optimization, and developer APIs that make it easy to create reliable, visually compelling applications at scale. We operate in a collaborative, high-trust environment and partner closely with firmware, platform, and product teams to ensure the end-to-end experience is fast, robust, and future-ready. About the Role As a Senior Software Engineer on the UI team, you’ll design, implement, and optimize systems that underpin Roku’s user experience and developer platform. You’ll work on performance-critical code paths across graphics rendering, animation, layout, and UI frameworks, ensuring smooth visuals and highly responsive interactions across a wide range of devices. You’ll play a key role in shaping core architecture, working across the stack with hardware, firmware, and application teams, and delivering solutions that directly impact tens of millions of users. This role is ideal for engineers who enjoy deep technical problem-solving, care about performance at a systems level, and want to build the foundational layers that power great user experiences. What You’ll Be Doing Build and scale UI frameworks and features optimized for millions of users Design and implement performance-critical systems across rendering pipelines, layout engines, and animation frameworks using C++ Develop and maintain developer-facing tools and UI layers Lead technical investigations and architect solutions across middleware and UI infrastructure Integrate AI/ML capabilities into developer workflows and platform features, leveraging generative AI to improve productivity and user experience Collaborate with cross-functional teams to deliver platform features with measurable gains in performance, reliability, and scalability Create tooling, frameworks, and automation that improve developer efficiency and code quality Mentor junior engineers through design reviews, pair programming, and technical guidance Stay current with advancements in graphics, UI systems, and AI, and proactively identify opportunities for improvement We’re Excited If You Have 6+ years of software engineering experience with a strong focus on UI frameworks, systems, or application development Strong proficiency in C++ for performance-critical systems and rendering pipelines Strong proficiency in TypeScript for Experience with Javascript/BrightScript or similar scripting languages Proficiency in Python for tooling, automation, or AI workflows Hands-on experience integrating AI/ML and generative AI tools into development workflows or product features Solid understanding of graphics systems, rendering, or UI performance optimization Strong debugging and root cause analysis skills Clear and effective technical communication skills A proactive mindset with a focus on ... (truncated, view full listing at source)