Senior Full Stack Engineer
Confirmed on the employer's own hiring board on Oct 6, 2026. First seen by Alion on Oct 5, 2026.
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 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, 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 Full Stack Engineer at Mux, you will build and manage scalable and highly available applications and services that can reliably support our products' feature development and growing traffic. The Platform Experience team is focused on providing a consistent, effective platform experience for customers. You will work on ensuring our customer-facing platform is resilient and will also be writing new application code to support product features. We’re looking for engineers that love both systems and application-level challenges across various teams, who will take on strong ownership of critical product infrastructure, and enjoy being part of an inclusive and creative Engineering team.
What You'll Do
Work with your team to collaborate and execute on product goals and technical roadmap.
Develop user-facing, product-focused features in our Elixir and Go backend services and our React frontend.
Building and scaling our billing and usage platform that supports all Mux products.
Working on identity and account management product features.
Working on distributed notifications such as application webhooks and alerting features.
Who You Are
We are hiring mid to senior level software engineers (6+ years of experience).
You’re a strong engineer comfortable working across multiple platforms and environments.
Solid engineering fundamentals (CS degree a plus).
Track record of working on hard problems including job scheduling, concurrency, and scaling.
Experience in JavaScript/TypeScript and React.
Experience building REST APIs that people enjoy using. Elixir experience is a big plus, but Go, Python, Ruby, Node, or other general-purpose programming languages are also great.
Experience deploying complex applications on cloud platforms using a container orchestration platform, such as Kubernetes.
Experience working with SQL databases. ClickHouse experience is a plus.
You enjoy fast-paced, highly collaborative environments and working across many different areas.
Video experience is a plus but not required.
We have a supportive culture that cares about both excellent work and work-life balance. We have office spaces in Downtown San Francisco, New York City, and London
U.S. Benefits
Flexible vacation + 11 company holidays
Weekly no-meeting days + quarterly focus weeks
Competitive health, dental, and vision insurance, including fertility
FSA and HSA available
Short-term and long-term disability insurance
Group life insurance
Travel accident insurance
401(k)
Paid parental leave
Professional Development program
Lunch, internet, & ancillary equipment reimbursements
UK Benefits
Competitive annual leave policy (25 days annual leave plus 8 public holidays)
Weekly no-meeting days + quarterly focus weeks
Private medical and dental insurance, and a vision stipend, including fertility
Short-term and long-term disability insurance
Group life assurance
Travel accident insurance
Matched Pension
Paid parental leave
Professional development program
Team social events
Lunch, cafe, & ancillary equipment reimbursements Mux is an Equal Opportunity employer committed to building a diverse company. We believe diversity makes us better, and we strive to be inclusive and equitable. That’s why we do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status or disability status.