Senior Software Engineer, Backend Jobs

Senior Software Engineer, Backend

Affirm

Location:
Canada

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

150000.00 - 200000.00 CAD / Year

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Job Description:

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. The Decisions and Pricing Foundations team owns the foundational aspect of Affirm’s beating heart: the Underwriting Engine. We architect, modernize, and optimize Affirm’s Underwriting capabilities to serve an ever increasing number of consumers and merchants while maintaining high availability and excellent economics.

Job Responsibility:

own and deliver quarterly goals for your team, lead engineers on your team through ambiguity to solve open-ended problems, and ensure that everyone is supported throughout delivery
support peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics by participating in ideation, articulating technical constraints, and partnering on decisions that properly consider risks and trade-offs
proactively identify project, process, technology or business issues, advocate for them, and lead in solving them
support the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed, and supporting “keep the lights on” & on-call efforts
foster a culture of quality and ownership on your team by setting or improving code review and design standards for your team, and advocating for them beyond your team through your writing and tech talks
help develop talent on your team by providing feedback and guidance, and leading by example

Requirements:

4+ years of experience designing, developing and launching backend systems at scale using languages like Python or Kotlin
track record of developing highly available distributed systems using technologies like AWS, MySQL and Kubernetes
familiar with processing data offline using frameworks like Spark or Ray
knowledge of stream processing architectures and ability to bridge the gap between online and offline systems with hybrid designs
experience defining a technical plan for the delivery of a significant feature or system component with an elegant, simple and extensible design
write high quality code that is easily understood and used by others
proficient at making significant changes in a large code base, and have developed a suite of tools and practices that enable you and your team to do so safely
experience demonstrates that you take ownership of your growth, proactively seeking feedback from your team, your manager, and your stakeholders
strong verbal and written communication skills that support effective collaboration with our global engineering team

What we offer:

monthly stipends for health, wellness and tech spending
100% subsidized medical coverage, dental and vision for you and your dependents
equity rewards
flexible Spending Wallets - generous stipends for spending on Technology, Food, various Lifestyle needs, and family forming expenses
competitive vacation and holiday schedules
employee stock purchase plan enabling you to buy shares of Affirm at a discount

Additional Information:

Job Posted:
December 15, 2025

Employment Type:

Fulltime

Work Type:

Remote work

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