Senior Staff Software Engineer, Frontend (Web Infra)

September 19, 2026

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. 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. 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. You’ll help mentor and grow a talented team of senior engineers, and build relationships with architects and product teams across Affirm. What You'll Do <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>What We Look For <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 people management experience: You know how to influence, effectively communicate, and coach others</li><li>Take Ownership: You embody an ownership mindset and help influence a similar culture to those around you. </li><li>You have strong verbal and written communication skills that can help influence and share critical decisions with stakeholders</li><li>This position requires either equivalent practical experience or a Bachelor’s degree in a related field. </li></ul>Pay Grade - R Equity Grade - 9 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: $209,000 - $269,000 This posting is for an existing vacancy Remote-first with flexibility built in Affirm is proud to be a remote-first company. Most roles can be done from almost anywhere within the country of employment. Some positions may occasionally require in-person work at an Affirm office, and a few are office-based due to the nature of the work. All new hires will be invited to attend an in-person onboarding experience. Benefits Designed For You Our benefits reflect our commitment to care, transparency, and flexibility. Here are a few highlights: <ul><li>Health coverage at no cost: We cover 100% of premiums for employees and their dependents.</li><li>Spending stipends: Monthly stipends support your tech setup, and the ability to choose health and wellness options that are right for you.</li><li>Time off to recharge: Flexible time off and generous holiday calendars help you rest when you need to.</li><li>Own a piece of what you build: Our employee stock purchase plan (ESPP) lets you buy Affirm stock at a discount. </li></ul>We’re committed to providing an inclusive interview process, including accommodations for candidates with disabilities. If you need support, we’re happy to help. For positions based in San Francisco or Los Angeles: Affirm considers qualified applicants with arrest and conviction records, as required by law. By clicking "Submit Application," you acknowledge that you have read Affirm's Global Candidate Privacy Notice and consent to the use of your personal information as described.

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