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Senior Full-Stack Developer (React, Contract)



The Developer Union is partnering with Instacart. We're looking for seasoned Full-Stack Engineers with experience in building web-based applications and tools to join our fast moving team. We work on a range of interesting and challenging problems, from supporting thousands of concurrent shoppers and processing millions of data points in real time, to building tools for ad campaigns and sign-ups.

This is 3 month contract opportunity that could extend much longer. You will be building a brand new product with a React front-end and Ruby on Rails backend.


  • Be part of a distributed team, with a large amount of ownership and responsibility for managing things directly.

  • Ship high-quality solutions with a sense of urgency and speed.

  • Work closely with product managers, other teams, and both internal and external stakeholders, owning a large part of the process from problem understanding to shipping the solution.

  • Have the freedom to suggest and drive organization-wide initiatives.



  • Experience with relational databases [Postgres / MySQL]

  • Experience with HTML/CSS/JS

  • Experience with React

  • Experience with GraphQL APIs

Nice to haves:

  • Experience with Ruby on Rails

  • General knowledge of the modern JavaScript ecosystem, best practices


  • 5+ years relevant web development experience

  • Excited by constantly learning new technologies & skillsets - thrives in a collaborative team environment

  • Ownership over systems and team that you work on