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Senior Software Engineer, Backend (Consumer Data Platform)

Affirm· Consumer Engineering
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RemoteCA$153k - CA$213kfull-timePosted 1mo ago

About the role

Senior backend-focused role at Affirm within Growth Platform Engineering, designing and building scalable backend systems, APIs, and data models to power growth, experimentation, and personalization for millions of customers.

Responsibilities

  • Drive planning and prioritization of projects based on product, technical, and business goals using data-driven decision making.
  • Design and build scalable backend systems, APIs, and data models that power communications, experimentation, and personalization.
  • Partner with Product Managers, Data Scientists, and Analysts to define and execute strategies for customer acquisition and engagement.
  • Establish and uphold engineering best practices to ensure services are secure, observable, and performant at scale.
  • Mentor and support junior engineers, contributing to a culture of learning, collaboration, and technical excellence.

Qualifications

  • 6+ years of experience as a Software Engineer with a focus on backend systems.
  • Strong understanding of distributed systems, service-oriented architecture, and how architectural choices affect scalability, reliability, and maintainability.
  • Proven track record of delivering complex backend systems in production environments.
  • Excellent written and verbal communication skills, with proficiency in asynchronous communication (design docs, technical specs, project plans, etc.).
  • Demonstrated ability to collaborate effectively across Product, Data Science, Analytics, and Design teams.
  • Proficiency in Python, Kotlin, or similar languages (experience with both is a plus).
  • Experience with AWS or other major cloud providers.
  • Bachelor’s degree in a related field or equivalent practical experience.
  • Experience with experimentation platforms (A/B testing frameworks, feature flagging systems).
  • Familiarity with event-driven architectures and stream processing tools (e.g., Kafka, Kinesis).
  • Exposure to large-scale personalization, recommendation, or messaging systems.

Skills

Required:Backend developmentDistributed systemsPythonAWS
Nice to have:KotlinExperimentation platformsEvent-driven architectures / stream processing

Benefits

  • Base pay range CAD 153,000 - 213,000 per year.
  • Equity rewards as part of total compensation.
  • Monthly stipends for tech setup and health/wellness options.
  • Flexible time off with generous holiday calendar.
  • Employee stock purchase plan (ESPP) to buy Affirm stock at a discount.
  • Health coverage for employees and dependents (no cost to employee premiums).
Last updated Sep 16, 2026. Interested? Apply on the company site.

About Affirm

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