Senior Platform Engineer

ABOUT MUX Mux is video for developers. Our mission is to democratize video by solving the hard problems developers face when building video: video encoding and streaming (Mux Video), video monitoring (Mux Data), and more. Video is a huge part of people’s lives, and we want to help make it better. We’re committed to building a healthy team that welcomes diverse backgrounds and experiences. We want people who care about our mission, are ready to grow, believe in our values (from Be Human to Turn Customers Into Fans), and want to improve the people around them. You’ll join a tight-knit team https://mux.com/team/ with experience at places like Google, YouTube, Twitch, Reddit, Zencoder, Fastly, and more. Our founders previously started (and sold) Zencoder, an early leader in cloud video technology, and authored Video.js, the biggest HTML5 video player on the web. We organize Demuxed https://demuxed.com/, the premier conference for video engineers in the world. We’re backed by top investors like Coatue, Accel, Andreessen Horowitz, and Y Combinator. You’ll get to work with amazing companies: hundreds of startups, plus Strava, Patreon, Vimeo, Robinhood, PBS, and Equinox. Customers, large and small, love working with us and love our team. We are building something big together. We’d love to hear from you! ABOUT THE ROLE As a Senior Platform Engineer focused on CI/CD and Developer Productivity at Mux, you’ll play a key role in evolving the foundation systems that power our high-traffic, distributed products and in shaping how engineers build, test, and ship them every day. You’ll be the force behind a smooth, end-to-end developer experience in our Kubernetes world, wiring together local dev, builds, tests, and deploys into fast reliable pipelines that scale with our Engineering teams. Our Platform Engineering team works cross-functionally with product engineers to reduce friction and increase confidence from their first line of code to production. In this role, you’ll design and run CI/CD systems that improve reliability and velocity across a polyglot monorepo, and partner closely with teams to understand pain points and turn them into delightful, durable tools. Your work will directly influence how quickly we can innovate and how enjoyable that innovation feels for everyone writing and shipping Mux products. We’re looking for a Senior Platform Engineer who loves the craft of building mature, reliable delivery systems, and is excited to accelerate teams as Mux scales from its startup roots. If you’re passionate about build systems, deployment automation, developer experience, and pushing the next generation of infrastructure that powers it all, you’ll feel right at home here. WHAT YOU'LL DO - Create paved paths from local dev to prod. Build and maintain a cohesive developer journey including local coding environments, build tooling, test workflows, artifact management, and deploy ergonomics so engineers can ship with confidence. - Make builds faster, safer, and more observable. Improve performance, reliability, “debuggability”, and visibility across our CI/CD stack, ensuring teams understand what’s happening and can fix issues quickly. - Partner deeply with product engineering teams. Pair with teams to understand friction points, co-design workflow improvements, and deliver tooling that fits real product needs not just theoretical ones. - Raise the bar on engineering standards and release quality. Define and evolve best practices for building software, rollout strategies, release automation, and production readiness as Mux scales its delivery maturity. - Shape the roadmap for developer productivity. Help prioritize and drive high-impact initiatives that keep Mux shipping quickly today and set us up for the next phase of growth. WHO YOU ARE - You’re fluent in modern CI/CD and the principles behind it. You’ve built, operated, and improved real production ready pipelines, and care about the fundamentals: fast feedback, repeatability, safet