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Senior Software Engineer

Affirm

$169,000 - $240,000
Oct 17, 2025
Remote, US
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Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest.

Requirements

  • Software application development including Kotlin, Python, React, MongoDB, or Node.js;
  • Leveraging software engineering best-practices including Source Control, Agile Methodology or Code Reviews to develop and deploy projects within an agreed upon timeline;
  • Utilizing modern testing frameworks including Jest to write and maintain unit, integration and functional tests;
  • Debugging code issues utilizing data and stack trace analysis.

Responsibilities

  • Design, develop, and test high quality software systems using JavaScript, React, Python and Kotlin;
  • Create tools and libraries that provide foundational functionality for, or in support of, the web appli-cation using JavaScript and React;
  • Maintain and improve test, build, and release pipelines;
  • Provide guidance on core application architectural decisions and driving implementation;
  • Work with engineers across the organization on project definition, technical specification, task break-down, delivery, monitoring, and maintenance;
  • Engineering and integrating Affirm's systems with third-party servicing solutions such as Salesforce Service Cloud;
  • Debugging code issues utilizing data and stack trace analysis.

Other

  • Incorporate needs and opinions from stakeholders, advocating for ideas and initiatives;
  • Provide support on questions around the software systems and the tooling built around the app;
  • May telecommute.
  • 5% Domestic Travel.
  • Employees new to Affirm typically come in at the start of the pay range.