Senior Staff Software Engineer, Frontend (Web Infra)

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

Build and drive web development strategy for all frontend teams

Deliver critical improvements to our large monorepo build and deploy systems, focusing on high reliability and performance

Architect and contribute to decisions on the right platform, tools, and technologies to support consistency and reliability

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.

Design, implement, and extend core platform components and functionality to enable new products and features to be built

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

What We Look For

10+ years of experience architecting, building and scaling Web Apps for large users base

A deep understanding of both the current and emerging web technologies, such as React, Typescript, NX, Oxlint, TurboRepo, RSPack, and Vite

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.

Track record of successfully leading critical projects and leveraging partner teams for company-wide results

Extensive experience developing and implementing technical strategy that drove prominent change in system reliability and performance

Previous project management or people management experience: You know how to influence, effectively communicate, and coach others

Take Ownership: You embody an ownership mindset and help influence a similar culture to those around you.

You have strong verbal and written communication skills that can help influence and share critical decisions with stakeholders

This position requires either equivalent practical experience or a Bachelor’s degree in a related field.

Base Pay Grade - R

Equity Grade - 15

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.