Software Engineer II, Backend, Online Storage

Affirm

. Build and scale Affirm’s Cache Services on Redis and Valkey .

Posted 10/8/2026full-timeRemote • CanadaJuniorMid-Level💰 CA$133,000 - CA$183,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and scaling cache services using Redis and Valkey, with a strong focus on automating infrastructure operations and managing production environments. Proficient in backend system design and development, with a solid understanding of distributed systems and performance metrics.

Highest-signal resume keywords

Redis Cache ServicesPython ProgrammingKubernetes ManagementTerraform AutomationDistributed Systems Design

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Backend System DevelopmentCache Cluster ManagementProduction OperationsCode ReviewInfrastructure Automation

Soft Skills

Strong Communication SkillsCollaboration

Tools & Technologies

AWSMySQLValkeyTerraformKubernetes

Industry Keywords

Cluster MigrationCapacity PlanningFailover SetupReplicationSLO Definition

Tech Stack

Tools & technologies

AWSDistributed SystemsKotlinKubernetesMySQLPythonRedisTerraform

About the role

Key responsibilities & impact

Build and scale Affirm’s Cache Services on Redis and Valkey
Own cluster migrations end to end and deliver them in phases
Productionize cache clusters through capacity and shard planning, failover and replication setup, upgrades and staged rollouts
Automate provisioning, configuration changes and access through audited self-service workflows
Operate the production fleet by defining SLOs, building alerts and reducing keep-the-lights-on work
Partner with client teams on caching strategy, including key design, TTLs, consistency and client timeouts
Break larger projects into tasks and deliver them in multiple phases
Collaborate with product management, design and analytics on product development decisions and trade-offs
Create and monitor metrics, escalate issues and support on-call operations
Participate in growth and development activities, including interviews

Requirements

What you’ll need

2+ years of experience as a software engineer
Experience designing, developing and launching backend systems
Proficiency in Python or Kotlin
Familiarity with distributed systems, AWS, MySQL, Redis/Valkey, Terraform and Kubernetes
Production experience with Redis, Valkey or a comparable in-memory store
Understanding of replication, persistence, cluster mode, eviction and failure modes
Ability to reason about hit rates, tail latency, hot keys, stampedes and consistency
Experience automating infrastructure operations with Terraform, Kubernetes and Python
Experience carrying on-call for a stateful service
Ability to write clear, well-tested and extensible code across multiple software components
Comfort navigating large codebases, debugging code and conducting code reviews
Strong verbal and written communication skills
Must reside in Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Nova Scotia, Ontario, Prince Edward Island or Saskatchewan

Benefits

Comp & perks

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) to buy Affirm stock at a discount
Inclusive interview process and accommodations for candidates with disabilities
In-person onboarding experience for all new hires