Senior Staff Software Engineer, Consumer Engineering (Web Infra)

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.

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 abilit