Staff Backend Engineer leading telemetry architecture and observability at Affirm, a buy-now-pay-later company. Improving distributed-system reliability, cost efficiency and AI-assisted development practices.
Responsibilities
Own the architecture of Affirm’s telemetry pipeline, balancing reliability, query performance and cost at 200+ TB/day
Design log-sampling strategies that reduce volume and cost while preserving incident-response signal
Shape observability practices for agentic development, AI coding agents and code review
Set technical strategy for the team on a year-long horizon
Drive cross-functional projects with product management, design and analytics
Define and advocate for technical solutions and operational processes
Own team operations and availability, including monitoring, triage rotations, playbooks, policies, testing, alerting and on-call efforts
Establish code-review and design standards
Foster team quality and ownership through writing and tech talks
Mentor and develop a team of six engineers
Define roadmap and partner with infrastructure and product teams
Requirements
8+ years of experience designing, developing and launching backend systems at scale
Experience using languages such as Python or Kotlin
Extensive experience developing highly available distributed systems
Experience with AWS, MySQL, Flink and Kubernetes
Experience building or operating high-volume telemetry systems using OpenTelemetry, Kafka and Terraform
Knowledge of modern observability practices, including structured and wide events, sampling, cardinality management and SLOs
Experience driving adoption of platform standards across many engineering teams
Experience delivering major features or system components, or deprecating existing functionality, through technical and execution planning
Ability to write high-quality, maintainable code
Ability to work across low-level language idioms and large-system architecture
Strong verbal and written communication skills
Ability to collaborate with a global engineering team
Benefits
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 disability accommodations
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