Senior Software Engineer, Backend

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

Use this summary to align your resume positioning with the role.

Demonstrates expertise in designing and developing scalable backend systems, with proficiency in Python or Kotlin, AWS, MySQL, and Kubernetes. Strong leadership skills in guiding engineering teams through complex problem-solving and fostering collaboration across departments.

Highest-signal resume keywords

Backend System DesignPython ProgrammingAWS ExperienceKubernetes ManagementDistributed Systems Development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Backend System DevelopmentCode Review StandardsSystem DesignHigh-Quality Code WritingOperational Metrics MonitoringTechnical PlanningSafe Codebase ChangesDistributed SystemsProcess ImprovementTechnical Constraints Articulation

Soft Skills

Strong Communication SkillsTeam CollaborationMentoringProblem-SolvingFeedback and Guidance

Tools & Technologies

AWSMySQLKubernetesCode Review ToolsOperational Monitoring Tools

Industry Keywords

Agile MethodologiesEngineering StandardsTechnical ConstraintsRisk ManagementTrade-Off Decisions

Tech Stack

Tools & technologies

AWSDistributed SystemsKotlinKubernetesMySQLPython

About the role

Key responsibilities & impact

Own and deliver quarterly goals for the team
Lead engineers through ambiguous, open-ended problems
Support team members throughout delivery
Collaborate with product management, design and analytics during ideation and product development
Articulate technical constraints and partner on risk and trade-off decisions
Identify and resolve project, process, technology and business issues
Create and monitor operational metrics
Escalate issues and support keep-the-lights-on and on-call efforts
Set and improve code review and design standards
Advocate for engineering standards through writing and tech talks
Develop team talent through feedback, guidance and example

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 system design skills
Ability to write high-quality, understandable code
Proficiency making significant changes in a large codebase
Tools and practices enabling safe codebase changes
Strong verbal and written communication skills
Ability to collaborate with a global engineering team

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
Inclusive interview process and accommodations for candidates with disabilities
Remote-first flexibility
In-person onboarding experience for all new hires