[Remote] Staff Software Engineer, Backend (Capacity Modeling)

Note: The job is a remote job and is open to candidates in USA. 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. The Capacity Modeling team ensures Affirm can safely handle forecasted traffic—especially during peak sales events—by translating demand forecasts into concrete, testable capacity plans.ResponsibilitiesYou 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 projectsYou 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 managedYou will act as a force-multiplier for your team through your definition and advocacy of technical solutions and operational processesYou take ownership of your team’s operations and availability by ensuring you have the right monitoring, triage rotations, playbooks, policies, testing and alerting in place to support “keep the lights on” & on-call effortsYou 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 talksYou will help develop talent on your team by providing feedback and guidance, and leading by exampleSkills8+ years of experience designing, developing and launching backend systems at scale using languages like Python or KotlinExtensive track record of developing highly available distributed systems using technologies like AWS, MySQL, Spark and KubernetesExperience supporting scale up and down of large scale sales event such as Prime Day, Black Friday Cyber Monday, or other sales holidaysTuned autoscaling, CPU/Memory, and multi-threading for compute type workloadsExperience delivering major features, system components or deprecating existing functionality in a system through the definition of a technical and execution planWrite high quality code that is easily understood and used by othersThrive in ambiguity, and are comfortable moving from low level language idioms all the way to the architecture of large systems to understand how they workGrowth and impact trajectory demonstrates that you have mastered gathering and iterating on feedback from your engineering and cross-functional peersStrong verbal and written communication skills that support effective collaboration with our global engineering teamBenefitsMonthly stipends for health, wellness and tech spendingBenefits (including 100% subsidized medical coverage, dental and vision for you and your dependents)Equity rewards offered by Affirm Holdings, Inc. (parent company)Health care coverage - Affirm covers all premiums for all levels of coverage for you and your dependentsFlexible Spending Wallets - generous stipends for spending on Technology, Food, various Lifestyle needs, and family forming expensesTime off - competitive vacation and holiday schedules allowing you to take time off to rest and rechargeESPP - An employee stock purchase plan enabling you to buy shares of Affirm at a discountCompany OverviewAffirm is a financial technology services company that offers installment loans to consumers at the point of sale. It was founded in 2012, and is headquartered in San Francisco, California, USA, with a workforce of 1001-5000 employees. Its website is https://www.affirm.com.Company H1B SponsorshipAffirm has a track record of offering H1B sponsorships, with 11 in 2026, 104 in 2025, 96 in 2024, 133 in 2023, 179 in 2022, 132 in 2021, 57 in 2020. Please note that this does not guarantee sponsorship for this specific role.