Union.ai builds open source software for orchestrating massively scalable machine learning and data processing pipelines.  These pipelines power some of your favorite apps on your phone, as well as diverse industries including vaccine research and autonomous cars.  ML engineers, data scientists, and system administrators manage these pipelines using a variety of tools, including interactive web consoles that we help build in collaboration with open source developers around the world.  

We seek seasoned senior front-end engineers to deliver delightful web user experiences to the people managing these complicated systems.  You will be challenged to build complex, modern web applications quickly but thoughtfully, balancing speed-to-market with scalability and maintainability.


  • We seek a candidate with at least 3-5 years of experience building modern interactive web experiences
  • Bachelor’s degree in computer science or related field, or equivalent experience
  • Excellent verbal and written communication skills -- we work as a global team integrated with with a global open-source community
  • Proven eloquence in modern TypeScript
  • Thorough understanding of React.js and its core principles
  • Proven unit testing discipline
  • Mastery of cross-browser accessibility standards, and proven commitment to building accessible web applications
  • Expert knowledge of debugging, maintaining, and upgrading live software systems

If this challenge intrigues you please shoot us your CV.  We’d love to talk.  

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