Senior Staff Software Engineer, Frontend (Web Infra)

<div class="content-intro"><p>At Affirm, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most.</p></div><p>Affirm is looking for a Senior Staff Software Engineer to take on a critical role in defining and leading web platform and infrastructure across all web engineering.</p> <p>You'll shape best practices, lead architectural choices, and drive the successful delivery of critical initiatives. This role requires a high level of technical ability and leadership, and experience with advancing and improving design systems, application architecture, CI/CD, observability, performance, and AI tooling for complex, mission critical web applications. </p> <p>You’ll help mentor and grow a talented team of senior engineers, and build relationships with architects and product teams across Affirm.</p> <h2><strong>What You'll Do</strong></h2> <ul> <li>Build and drive web development strategy for all frontend teams</li> <li>Deliver critical improvements to our large monorepo build and deploy systems, focusing on high reliability and performance</li> <li>Architect and contribute to decisions on the right platform, tools, and technologies to support consistency and reliability</li> <li>Empower web engineers to leverage AI to improve delivery speed, code quality, and developer experience across all web engineers at the company. Help define Affirm’s web development AI strategy, leveraging agents and agent orchestration, to automate complex workflows.</li> <li>Design, implement, and extend core platform components and functionality to enable new products and features to be built</li> <li>Plan, design, and build our core platform software and systems to scale with an increasing number of users, features, business requirements, partners, and new engineers</li> </ul> <h2><strong>What We Look For</strong></h2> <ul> <li>10+ years of experience architecting, building and scaling Web Apps for large users base</li> <li>A deep understanding of both the current and emerging web technologies, such as React, Typescript, NX, Oxlint, TurboRepo, RSPack, and Vite</li> <li>The ability to create and drive a complete technical vision and roadmap - you are detail-oriented, but you are able to step back, look at the big picture, and make bold system-level and platform-level calls for change.</li> <li>Track record of successfully leading critical projects and leveraging partner teams for company-wide results</li> <li>Extensive experience developing and implementing technical strategy that drove prominent change in system reliability and performance</li> <li>Previous project management or peo