Senior Staff Software Engineer, Frontend (Web Infra)

🏢 About Affirm

Affirm is reinventing consumer credit to make financial products honest and friendly. By eliminating hidden fees, compounding interest, and penalties, Affirm gives consumers clarity and control over their purchases. The platform powers flexible payments for leading global merchants including Amazon, Walmart, Target, and Shopify, serving tens of millions of active users.

🎯 The Role

Affirm is seeking a Senior Staff Software Engineer to define and lead web platform and infrastructure across all web engineering teams. In this role, you will shape technical strategy, drive architectural standards, optimize monorepo tooling, and establish best-in-class frontend developer velocity.

🛠️ Tech Stack

• React
• TypeScript
• Modern JavaScript (ESNext)
• Design systems and shared UI component libraries
• Monorepo build tools, CI/CD, and client observability platforms

💼 What You'll Do

• Lead the overall technical direction and architectural roadmap for web frontend systems across Affirm.
• Optimize large-scale monorepo build, test, and release pipelines to maximize developer productivity.
• Partner with design and engineering teams to evolve enterprise design systems and accessibility standards.
• Instrument web application observability, Core Web Vitals profiling, and proactive client-side error monitoring.
• Mentor senior and staff engineers through technical coaching, design reviews, and architectural RFCs.

✅ What You'll Need

• 8+ years of experience engineering modern frontend applications and client infrastructure.
• Advanced mastery of React, TypeScript, and web browser runtime internals.
• Demonstrated track record of leading large-scale frontend architecture and tooling across multiple teams.
• Deep understanding of web performance tuning, code splitting, caching, and CI/CD pipelines.
• Clear communication skills with experience influencing engineering roadmaps at an organizational level.

🌟 Nice to Have

• Hands-on experience integrating AI-assisted developer workflows and automated code modernization tooling.
• Background in high-security, compliant fintech or checkout ecosystems.