Senior Staff Software Engineer, Frontend (Web Infra)

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.

Affirm is looking for a Senior Staff Software Engineer to define and lead web platform and infrastructure across all web engineering. You'll shape best practices, lead architectural choices, and drive delivery of critical initiatives. This role requires high technical ability and leadership, experience with design systems, application architecture, CI/CD, observability, performance, and AI tooling for complex web applications. You'll mentor senior engineers and build relationships with architects and product teams.

• Build and drive web development strategy for all frontend teams
• Deliver critical improvements to the large monorepo build and deploy systems, focusing on reliability and performance
• Architect decisions on platform, tools, and technologies for consistency and reliability
• Empower web engineers to leverage AI to improve delivery speed, code quality, and developer experience
• Help define Affirm's web development AI strategy, leveraging agents and agent orchestration
• Design, implement, and extend core platform components to enable new products and features
• Plan and build core platform software to scale with users, features, and business requirements

• 10+ years of experience architecting, building, and scaling web apps for large user bases
• Deep understanding of current and emerging web technologies: React, TypeScript, NX, Oxlint, TurboRepo, RSPack, Vite
• Ability to create and drive a complete technical vision and roadmap
• Track record of leading critical projects and leveraging partner teams for company-wide results
• Experience developing technical strategy that drove change in system reliability and performance
• Previous project management or people management experience
• Strong verbal and written communication skills
• Equivalent practical experience or a Bachelor's degree in a related field

CAN base pay range per year: $209,000 - $269,000. Pay Grade - R, Equity Grade - 9. Total compensation 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. Employees may be eligible for equity rewards.

• Health care coverage - Affirm covers all premiums for all levels of coverage for you and your dependents
• Flexible Spending Wallets - generous stipends for Technology, Food, Lifestyle needs, and family forming expenses
• Time off - competitive vacation and holiday schedules
• ESPP - employee stock purchase plan

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