Senior Core Services Engineer

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. Our business model introduces unique problems to solve in order to deliver a delightful personalized experience for our customers - are you up for the challenge? You will work on a broad set of domains, from building new services to support our ever growing marketplace to continuing the decomposition of our Rails monolith into microservices to tackling API design and management for feature development. You will help scale our core systems that serve millions of our customers. To be successful in this role, you’ll need to be passionate about designing, building, and maintaining scalable and robust services.


  • Configure, build, and maintain the services that power our marketplace.
  • Contribute to the API design for our product features.
  • 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.
  • Contribute to improving our processes and engineering culture.

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.


  • 5+ years of production-level engineering experience.
  • Production experience with Ruby on Rails and/or Node.js.
  • Production experience with Search backends (Elasticsearch, SOLR, Lucene, etc.)
  • Experience in distributed systems design and best practices.
  • Experience with API design & management at scale.Believer in automated testing.
  • (Bonus) Kubernetes experience.

What We Offer

  • The opportunity to make a massive impact for our business and customer alongside a team of passionate engineers.
  • The opportunity to influence outcomes for an emerging company.
  • Working within a modern tech stack with a high level of autonomy and trust.
  • Competitive salary, equity and full benefits (health/dental/vision insurance & 401k).
  • Work from home Tuesdays and Thursdays (what we call Maker Days).

Meet Some of thredUP's Employees

Dan D.

VP, Engineering

Dan and his team work with colleagues across the organization to brainstorm and develop empowering engineering solutions for thredUP and its stakeholders.

Jose R.

Distribution Center Manager

Jose oversees the thredUP distribution center in Mechanicsville, Pennsylvania—sending out orders and sorting new materials as they arrive at the facility.

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