Senior Software Engineer, Backend – Trust & Safety

Affirm

. Own and deliver quarterly goals for the team .

Posted 11/9/2026full-timeRemote • CanadaSenior💰 CA$153,000 - CA$213,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and developing highly available backend systems at scale, utilizing Python or Kotlin, and leveraging AWS, MySQL, and Kubernetes. Strong leadership in guiding teams through ambiguity while fostering collaboration and maintaining engineering standards.

Highest-signal resume keywords

Backend System DesignPython ProgrammingAWS ProficiencyKubernetes ExperienceDistributed Systems Development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Backend System DevelopmentCode Review StandardsTechnical PlanningHigh-Quality Code WritingDistributed Systems DesignMetrics MonitoringSafe Code Change PracticesReal-Time Systems DevelopmentTechnical Constraints ArticulationProcess Resolution

Soft Skills

Strong Communication SkillsTeam LeadershipMentoringCollaborationProblem Solving

Tools & Technologies

AWSMySQLKubernetesReal-Time SystemsCode Review Tools

Industry Keywords

Engineering StandardsProduct Development LifecycleRisk ManagementFraud ProtectionOn-Call Support

Tech Stack

Tools & technologies

AWSDistributed SystemsKotlinKubernetesMySQLPython

About the role

Key responsibilities & impact

Own and deliver quarterly goals for the team
Lead engineers through ambiguity to solve open-ended problems
Support team members throughout delivery
Collaborate with product management, design and analytics throughout the product development lifecycle
Participate in ideation and articulate technical constraints
Partner on decisions that consider risks and trade-offs
Identify and lead resolution of project, process, technology or business issues
Create and monitor metrics for team artifacts
Escalate issues when needed
Support keep-the-lights-on and on-call efforts
Set or improve code review and design standards
Advocate for engineering standards through writing and tech talks
Develop team talent through feedback and guidance
Lead by example
Build real-time systems, risk signals and tools that protect consumers, merchants and the network from fraud and abuse

Requirements

What you’ll need

4+ years of experience designing, developing and launching backend systems at scale
Experience using languages like Python or Kotlin
Track record developing highly available distributed systems
Experience with AWS, MySQL and Kubernetes
Experience defining technical plans for significant features or system components
Elegant, simple and extensible design skills
Ability to write high-quality, understandable code
Proficiency making significant changes in a large code base
Tools and practices enabling safe code changes
Strong verbal and written communication skills
Role is open only to candidates residing in Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Nova Scotia, Ontario, Prince Edward Island, or Saskatchewan

Benefits

Comp & perks

Equity rewards may be included in the total compensation package
Monthly stipends for health, wellness and tech spending
100% subsidized medical coverage for employees and dependents
Dental and vision coverage for employees and dependents
Flexible time off
Generous holiday calendars
Employee stock purchase plan (ESPP) allowing employees to buy Affirm stock at a discount
Remote-first flexibility
In-person onboarding experience for all new hires
Inclusive interview process and accommodations for candidates with disabilities