Senior Software Engineer, Backend

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Senior Software Engineer, Backend in Canada

Affirm
Full time
Email

Canada
10/10/2026
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Remote

Responsibilities

Own and deliver quarterly team goals while leading engineers through ambiguous, open-ended problems.
Collaborate with product management, design, analytics, and other stakeholders on ideation, technical constraints, risks, and trade-offs.
Build reliable backend systems, data pipelines, identity and event data systems, attribution capabilities, and conversion measurement integrations.
Support operations and availability by creating and monitoring metrics, escalating issues, and participating in on-call and keep-the-lights-on efforts.
Set and improve code review and design standards, and advocate for quality and ownership through writing and technical talks.
Develop team talent through feedback, guidance, and leading by example.

Requirements

4+ years of experience designing, developing, and launching backend systems at scale using languages such as Python or Kotlin.
Experience developing highly available distributed systems with technologies such as AWS, MySQL, and Kubernetes.
Hands-on experience building marketing data and measurement systems using Google Tag Manager, GA4, advertising and conversion APIs, customer data platforms, attribution or mobile measurement platforms, and consent management platforms.
Experience building production data pipelines and analytical models using Snowflake, dbt, and Airflow, including event-level data, identity resolution, attribution, or conversion measurement.
Ability to define technical plans for significant features or system components and create elegant, simple, extensible designs.
Ability to make significant changes in large codebases and develop tools and practices that enable safe delivery.
Strong ownership, feedback-seeking, verbal communication, and written communication skills.

Benefits

Remote-first role open to candidates in Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Nova Scotia, Ontario, Prince Edward Island, or Saskatchewan; occasional office work and in-person onboarding may apply.
100% subsidized medical coverage, dental coverage, and vision coverage for employees and dependents.
Monthly tech, health, and wellness spending stipends.
Flexible time off and generous holiday calendars.
Employee stock purchase plan with discounted Affirm stock.
Inclusive interview process with accommodations for candidates with disabilities.

Affirm

Affirm offers a straightforward approach to credit by allowing consumers to buy now and pay later, all while eliminating hidden fees and compounding interest. This commitment to transparency and flexibility sets Affirm apart in the financial services landscape, making credit more accessible and c...

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