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Senior Software Engineer, Commerce Platform (Fullstack)

Instacart

$162,000 - $217,000
Aug 25, 2025
Remote, US
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Instacart is looking to shape the next generation of its foundational platform and contribute to its exponential growth by ensuring the seamless processing of millions of orders, credit card transactions, and invoice calculations every day.

Requirements

  • 6+ years of software development experience
  • Solid experience in building web applications using HTML, CSS, Rails, and React.js (or comparable frameworks).
  • Strong understanding of UX principles and a keen eye for usability issues in web applications.
  • Proficiency with front-end testing frameworks such as Jest, Mocha, or Enzyme.
  • Familiarity with Ruby on Rails framework and experience using Sorbet for strong-typing.
  • Experience working with client-facing flexible APIs exposed via GraphQL.
  • Knowledge of backend relational data stores like Postgres and Snowflake.

Responsibilities

  • You will work closely with Front-End engineers to set high standards for product and code quality within our web applications.
  • With our server-driven client/server architecture, you will have the opportunity to engage in full-stack development.
  • Your contributions will span the entire development process, from problem understanding to delivering innovative solutions.
  • Maintaining our engineering standards and promoting codebase consistency will be among your key responsibilities.
  • By shipping high-quality, scalable, and robust solutions, you will help us shape the future of Instacart.
  • Furthermore, you will have the freedom to suggest and lead organization-wide initiatives that drive innovation and excellence.
  • You will be part of a small and dynamic group that encourages ownership, fosters collaboration, and values continuous improvement.

Other

  • You will collaborate with product managers, designers, internal and external partners, and other teams to drive successful outcomes.
  • Proactive and adaptable mindset, with the ability to research, propose, implement, and deploy new integrations.
  • In-depth understanding of various payment systems and methods used in eCommerce, including credit/debit cards, digital wallets, mobile payments, and alternative payment solutions.
  • Experience with order management systems (OMS) or eCommerce platforms that handle the end-to-end order lifecycle.
  • Expertise in invoicing and billing processes within an ecommerce environment.