Senior Staff Backend Engineer - AI-Driven FinTech Platform Lead

Affirm; San Francisco (CA); Remote; USD 236,000 - 325,000; Full time

Benefits offered by this job

Health coverage

Spending stipends

Flexible time off

Employee stock purchase plan

Job summary

Affirm is seeking a Senior Staff Software Engineer to define and lead technical excellence in Cards. You will partner with engineering leaders, shape the technical strategy across full‑stack teams, and coordinate with stakeholders to build scalable, reliable solutions.

You will mentor engineers, promote best practices, and drive critical initiatives with an ownership mindset and a customer‑first approach. Remote‑first with flexibility, this role requires high‑impact leadership and the ability to

Qualifications

• 10+ years of experience across the stack, driving architectural improvements in the backend.
• Bonus points for experience with React Native, JavaScript, or Kotlin.
• Experience driving change across large engineering organizations.
• Track record of leading critical projects across multiple teams for company-wide results.
• Experience implementing technical strategy to improve reliability and responsiveness.
• Ownership mindset and willingness to influence the culture around you.
• Strong verbal and written communication skills with stakeholders.
• Bachelor's degree or equivalent practical experience.

Responsibilities

• Define the technical direction, long-term technical roadmap, and strategic initiatives in Cards.
• Lead from the front using AI to build fast and revolutionize how we work.
• Stay close to industry leaders in FinTech to learn and apply market insights.
• Collaborate with stakeholders to champion technical excellence aligned with business results.
• Create and influence a strong ownership culture with accountability and scale.
• Architect and guide decisions on platform, tools, and technologies for reliability.
• Mentor and lead engineers by promoting best practices and growth.

Skills

Backend architecture

Leadership

Cross-functional

AI leadership

React Native

JavaScript

Kotlin

Mentoring

Communication

Education

Bachelor's degree

Job description

Affirm is seeking a Senior Staff Software Engineer to define and lead technical excellence in Cards. You will partner with engineering leaders, shape the technical strategy across full‑stack teams, and coordinate with stakeholders to build scalable, reliable solutions.

You will mentor engineers, promote best practices, and drive critical initiatives with an ownership mindset and a customer‑first approach. Remote‑first with flexibility, this role requires high‑impact leadership and the ability to