Senior Software Engineer, Backend (Trust & Safety)

About this role

Build and operate real-time backend systems, risk signals, and tools that protect Affirm’s consumers, merchants, and network from fraud and abuse. Own team goals and lead delivery of reliable systems while balancing risk reduction with a low-friction customer experience.

About the company

Affirm offers buy now, pay later financing that lets consumers split purchases into transparent installment payments at checkout. It partners with merchants to provide flexible credit options without late fees.

The team

Trust & Safety Engineering

Stack

What you'll do

• Own and deliver quarterly team goals, guiding engineers through ambiguous problems.
• Collaborate with product, design, and analytics on product decisions, technical constraints, and trade-offs.
• Identify and lead resolution of project, process, technology, and business issues.
• Monitor operational metrics, escalate issues, and contribute to on-call and availability efforts.
• Set and improve code review and design standards; share practices through writing and tech talks.
• Develop teammates through feedback and guidance.

What we're looking for

• 4+ years designing, developing, and launching backend systems at scale.
• Experience building highly available distributed systems.
• Ability to define technical plans and design elegant, simple, extensible system components.
• Write high-quality, understandable code and safely make significant changes in large codebases.
• Strong verbal and written communication skills.
• Bachelor’s degree in a related field or equivalent practical experience.

Benefits

• 100% subsidized medical, dental, and vision premiums for employees and dependents.
• Monthly technology, health, and wellness spending stipends.
• Flexible time off and generous holiday calendars.
• Employee stock purchase plan with a stock discount.