Sr. Software Engineer (Rails/React)

thredUP, San Francisco, CA

Makes secondhand shopping a cinch

About thredUP
thredUP is the largest online marketplace for secondhand clothing. We make buying and selling a cinch for millions of women across the globe. The company resells more than 35,000 brands across hundreds of categories at up to 90% off the original retail value. Headquartered in downtown San Francisco and backed by world-class investors, thredUP is reinventing the secondhand clothing industry and inspiring a new generation of consumers to think secondhand first.

About the Role
At thredUP we’re revolutionizing the clothing industry, and we want your help to design and evolve applications that build the backbone of our company. From image-processing and real-time prediction systems, to distribution center automation and workflow-management, there are a huge number of challenging and fun projects on the horizon that you can make an impact on.  We are also devoting significant time towards decoupled services, machine learning, continuous integration, and scalability.


  • Configure, build, and maintain the services that power our marketplace.
  • Implement experiments and collaborate with stakeholders to cycle iteratively with validated learnings.
  • Collaborate with your peers and other teams to teach, learn and execute efficiently.
  • Proactively seek systems improvements through refactoring and new tools
  • Setting realistic estimates and effective communication to technical/business stakeholders
  • Contribute to improving our processes and engineering culture.


  • 5+ years in production level software engineering experience ideally with JVM languages and frameworks
  • Experience in distributed systems design and best practices
  • Experience with API design & management at scale
  • Strong product comprehension
  • (Bonus) event-driven architecture experience -- Kafka, Kinesis, etc.
  • (Bonus) Kubernetes experience

What We Care About

  • Ownership, trust, responsibility and proactiveness.
  • A data-driven approach towards continuous improvement in the user experience.
  • Building scalable systems using best engineering practices, while understanding the tradeoff between time and perfection.
  • Autonomy. The ability to make, own, and carry out decisions.
  • Influencing outcomes. Thinking big. Speaking UP. Infinite learning. Transparency.

About thredUP

thredUP is the nation's leading online marketplace for women's and kids' like-new apparel. Over 25,000 brands, ranging from Gap to Gucci, are listed on thredUP.com at prices up to 90 percent off retail. 

Want to learn more about thredUP? Visit thredUP's website.