Staff Software Engineer, Backend (Capacity Modeling)

Affirm

Confirmed live today High trust
Remote

Quick summary

Work type
Remote
Location
Canada
Salary
$230,000–$290,000 / yr
Posted
173 days ago
Freshness
Confirmed live today

Market check

Salary context

Above market

How this pay compares to similar roles

Similar $225k
This role $260k
$175k $302k
below market most similar roles pay here above market

This role pays more than 88% of similar roles. Most pay $199,900–$250,250 — the blue band above. At the midpoint, this role pays about $260k versus about $225k for comparable roles.

Based on 240 similar postings.

Employer

About Affirm

Affirm is a buy-now, pay-later (BNPL) financial technology company that offers point-of-sale installment loans to consumers, allowing them to split purchases into fixed monthly payments with transparent terms. Industry: Financial Technology & Consumer Lending

Affirm currently has 64 open roles on FindRole.

Listed pay typically runs $195,000–$255,000 across 60 roles with salary data.

Most-posted roles

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At a glance

TL;DR · Staff Software Engineer, Backend (Capacity Modeling)

The Staff Software Engineer, Backend (Capacity Modeling) joins the Capacity Modeling team to ensure the platform safely handles forecasted traffic during peak sales events. This role involves translating demand forecasts into testable capacity plans by building and maintaining statistical models that map traffic inputs like checkout volume to resource outputs such as CPU, memory, and connections. You will define technical strategy, manage operational availability through monitoring and playbooks, and set code review standards. Key responsibilities include tuning autoscaling, multi-threading, and infrastructure sizing across regions. The role requires expertise in Python, Kotlin, AWS, MySQL, Spark, and Kubernetes. You will solve the technical problem of mapping traffic demands to specific infrastructure requirements for services including ElasticCache, DynamoDB, and AuroraDB to maintain system sustainability.

What does a Software Engineer earn in Remote?

Median $208800 from 354 postings across 50 companies.

See salary data

What you'll do

  • Translate demand forecasts into concrete, testable capacity plans for infrastructure resources.
  • Build and maintain statistical capacity models mapping traffic inputs to resource outputs like CPU and memory.
  • Define recommended capacity settings for pod counts, HPA ranges, and infrastructure sizing across regions.
  • Set the technical strategy for the team on a year-long time scale.
  • Own team operations by establishing monitoring, triage rotations, playbooks, and alerting policies.
  • Set code review and design standards to foster a culture of quality and ownership.
  • Provide feedback and guidance to develop the technical talent on the team.

What we're looking for

  • You have 8+ years of experience designing, developing, and launching backend systems at scale using languages like Python or Kotlin.
  • You have an extensive track record of developing highly available distributed systems using technologies like AWS, MySQL, Spark, and Kubernetes.
  • You have experience supporting the scale up and down of large-scale sales events like Prime Day or Black Friday.
  • You have experience tuning autoscaling, CPU/Memory, and multi-threading for compute type workloads.
  • You have experience delivering major features or system components through the definition of a technical and execution plan.
  • You have strong verbal and written communication skills to support effective collaboration with a global engineering team.
  • This position requires a Bachelor’s degree in a related field or equivalent practical experience.

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