Senior Staff Backend Engineer – AI‑Driven FinTech Cards

Affirm; St. Louis (MO); Remote; USD 236,000 - 325,000; Full time

Benefits offered by this job

Health coverage

Tech stipend

Flexible time off

ESPP

Job summary

Affirm is seeking a Senior Staff Software Engineer to define and lead technical excellence across full-stack teams. You will partner with engineering leaders, drive AI initiatives, and influence architectural choices to deliver scalable, reliable solutions.

The role requires strong leadership, project management, and a customer-first mindset with a track record of guiding large projects across engineering boundaries.

Qualifications

• 10+ years of experience across the stack and backend architectural improvements.
• Experience driving large engineering change and leading multi-team initiatives.
• Proven ability to define technical strategy and improve reliability and performance.

Responsibilities

• Define technical direction and long-term roadmap for Cards.
• Lead from the front in AI-enabled development and set engineering standards.
• Mentor engineers and foster ownership culture across teams.

Skills

Backend architecture

AI leadership

Cross-team leadership

Mentoring engineers

Communication skills

Cross-functional collaboration

Education

Bachelor's degree or equivalent

Tools

React Native

Javascript

Kotlin

Job description

Affirm is seeking a Senior Staff Software Engineer to define and lead technical excellence across full-stack teams. You will partner with engineering leaders, drive AI initiatives, and influence architectural choices to deliver scalable, reliable solutions.

The role requires strong leadership, project management, and a customer-first mindset with a track record of guiding large projects across engineering boundaries.