Staff Software Engineer, Backend (Cost Engineering)
- Role
- Backend
- Experience
- Staff
Open to CA only. Set where you work from to check your eligibility.
No BS summary
Staff backend/cost engineer with 8+ years building backend systems at scale. Needs distributed systems experience with cloud infrastructure, FinOps/cost-visibility tooling, automation, cloud billing data, SQL, and Canada residency in eligible provinces.
Core skills
Required skills
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Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest.
Engineering owns cost visibility and optimization across Affirm's cloud and AI infrastructure. We're the team that tells the business what it's spending, why it's changing, and what to do about it — from AWS resource waste and tagging strategy to the newer frontier of AI/LLM spend across the company's growing set of AI tools. We treat cost anomalies with the same rigor as production incidents: we've built a severity framework (mirroring Affirm's SEV0–3 incident model but mapped to dollar impact) with defined detection sources, TTD/TTR metrics, and escalation paths, and we operate a clear RACI with partner orgs — we own visibility and alerting, and partner teams own remediation (at times we may dig in deep and own remediation too!), so accountability never gets diffuse.
As a Staff Cost Engineer, you'll operate at the intersection of finance, infrastructure, and data engineering — designing the tooling, automation, and processes that scale cost governance across a fast-growing multi-cloud and multi-AI-vendor footprint. You'll set technical direction for the team, influence cost strategy with infra and platform leaders across the org, and turn ambiguous "why did spend spike" questions into durable systems and self-service tooling. We're a small, high-leverage team — you'll have outsized influence on how Affirm thinks about cost.
What You'll Do · You will be responsible for setting technical strategy for your team on a year-long time scale, and help your team tie it together with critical, business-impacting projects. · You will collaborate across teams in the product development lifecycle by collaborating with product management, design & analytics to ensure technical sustainability, risks and trade-offs are well understood and managed. · You will act as a force-multiplier for your team through your definition and advocacy of technical solutions and operational processes. · You take ownership of your team’s operations and availability by ensuring you have the right monitoring, triage rotations, playbooks, polcities, testing and alerting in place to support “keep the lights on” & on-call efforts. · You will foster a culture of quality and ownership on your team by setting code review and design standards for your team, and advocating for them beyond your team through your writing and tech talks. · You will help develop talent on your team by providing feedback and guidance, and leading by example.
What We Look 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. · Experience with a FinOps or cost-visibility platform (e.g., FinOut, CloudHealth, Kubecost, or an internal equivalent) — building dashboards, anomaly detection, or savings/waste reporting rather than just consuming them. · Track record of building automation or tooling (Python, Terraform, or similar) that turns a manual cost-review process into a scalable, self-service system — not just one-off analysis. · Hands-on experience with cloud billing/cost data at scale (AWS Cost & Usage Reports, Snowflake or similar warehouses) — comfortable writing complex SQL to model spend, allocate cost, and build unit-economics views from raw billing data. · You have experience delivering major features, system components or deprecating existing functionality in a system through the definition of a technical and execution plan. You write high quality code that is easily understood and used by others. · You thrive in ambiguity, and are comfortable moving from low level language idioms all the way to the architecture of large systems to understand how they work. · Your growth and impact trajectory demonstrates that you have mastered gathering and iterating on feedback from your engineering and cross-functional peers. · You have strong verbal and written communication skills that support effective collaboration with our global engineering team.
Pay Grade - P Equity Grade - 7
Employees new to Affirm typically come in at the start of the pay range. Affirm focuses on providing a simple and transparent pay structure which is based on a variety of factors, including location, experience and job-related skills.
Base pay is part of a total compensation package that may include monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents). In addition, the employees may be eligible for equity rewards offered by Affirm Holdings, Inc. (parent company).
CAN base pay range per year: CAD $181,000 - $241,000.
Location - Remote Canada This remote 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.
This posting is for an existing vacancy.
#LI Remote
Affirm is proud to be a remote-first company! The majority of our roles are remote and you can work almost anywhere within the country of employment. Affirmers in proximal roles have the flexibility to work remotely, but will occasionally be required to work out of their assigned Affirm office. A limited number of roles remain office-based due to the nature of their job responsibilities.
We’re extremely proud to offer competitive benefits that are anchored to our core value of people come first. Some key highlights of our benefits package include:
- Health care coverage - Affirm covers all premiums for all levels of coverage for you and your dependents
- Flexible Spending Wallets - generous stipends for spending on Technology, Food, various Lifestyle needs, and family forming expenses
- Time off - competitive vacation and holiday schedules allowing you to take time off to rest and recharge
- ESPP - An employee stock purchase plan enabling you to buy shares of Affirm at a discount
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What you'll do
- Set technical strategy for the team on a year-long time scale and connect it to critical business-impacting projects.
- Collaborate across the product development lifecycle with product management, design, and analytics to ensure technical sustainability, risks, and trade-offs are understood and managed.
- Act as a force multiplier through definition and advocacy of technical solutions and operational processes.
- Own team operations and availability by ensuring monitoring, triage rotations, playbooks, policies, testing, and alerting support on-call and keep-the-lights-on efforts.
- Foster a culture of quality and ownership by setting code review and design standards and advocating for them through writing and tech talks.
- Help develop talent on the team by providing feedback and guidance and leading by example.
- Design tooling, automation, and processes that scale cost governance across multi-cloud and multi-AI-vendor infrastructure.
- Set technical direction for the team and influence cost strategy with infrastructure and platform leaders.
- Turn ambiguous spend-spike questions into durable systems and self-service tooling.
What they require
- 8+ years of experience designing, developing, and launching backend systems at scale using languages like Python or Kotlin.
- Extensive track record of developing highly available distributed systems using technologies like AWS, MySQL, Spark, and Kubernetes.
- Experience with a FinOps or cost-visibility platform, such as FinOut, CloudHealth, Kubecost, or an internal equivalent, building dashboards, anomaly detection, or savings/waste reporting rather than only consuming them.
- Track record of building automation or tooling, such as Python, Terraform, or similar, that turns manual cost-review processes into scalable self-service systems rather than one-off analysis.
- Hands-on experience with cloud billing/cost data at scale, including AWS Cost & Usage Reports, Snowflake, or similar warehouses.
- Comfortable writing complex SQL to model spend, allocate cost, and build unit-economics views from raw billing data.
- Experience delivering major features, system components, or deprecating existing functionality through definition of a technical and execution plan.
- Writes high-quality code that is easily understood and used by others.
- Thrives in ambiguity and is comfortable moving from low-level language idioms to large-system architecture to understand how systems work.
- Growth and impact trajectory demonstrates mastery of gathering and iterating on feedback from engineering and cross-functional peers.
- Strong verbal and written communication skills supporting effective collaboration with a global engineering team.
- Candidate must reside in Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Nova Scotia, Ontario, Prince Edward Island, or Saskatchewan.
Benefits
- Monthly stipends for health, wellness, and tech spending.
- 100% subsidized medical coverage.
- Dental and vision coverage for employees and dependents.
- Equity rewards may be offered by Affirm Holdings, Inc.
- Health care coverage with all premiums covered for all levels of coverage for employees and dependents.
- Flexible Spending Wallets with stipends for Technology, Food, Lifestyle needs, and family forming expenses.
- Competitive vacation and holiday schedules.
- Employee stock purchase plan enabling employees to buy Affirm shares at a discount.
- Remote-first company.
- Work almost anywhere within the country of employment for most roles.
- Reasonable accommodations during the hiring process.
Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without hidden fees or compounding interest.
What people say about this company
3.7/ 5