Senior Staff Software Engineer, Backend (Cards)

About the Role

Affirm is reinventing credit cards entirely, working directly with card issuers to create new types of cards that work for everyday lives and large purchases with straightforward, flexible terms. We are looking for a Senior Staff Software Engineer to define and lead technical excellence and help shape the engineering culture across Cards.

You will lead from the front on AI while holding the bar high on quality, collaborating with engineering leaders, creating and implementing technical strategy across full-stack teams, and coordinating closely with stakeholders to build scalable, reliable, and high-performing solutions.

What You'll Do

• Lead the vision: Define technical direction, long-term technical roadmaps, and strategic initiatives in Cards.
• Be a role model: Lead from the front in using AI to build fast, take initiative, and revolutionize ways of working.
• Industry awareness: Stay close to FinTech industry leaders, learning from market movements.
• Stakeholder collaboration: Partner across Affirm teams to champion technical excellence aligned with business goals.
• Drive ownership: Create an ownership culture across teams with high accountability for building for scale and efficiency.
• Architect solutions: Guide architectural choices and decisions on platforms, tools, and technologies to support reliability and consistency.
• Mentor and lead: Champion best practices and guide engineers up to Staff level.

What We Look For

• 10+ years of experience working across the stack, driving architectural improvements in the backend.
• Bonus points for experience with languages like React Native, JavaScript, or Kotlin.
• Experience driving change across large engineering organizations.
• Track record of leading critical projects across multiple engineering teams and organizational boundaries.
• Extensive experience developing and implementing technical strategy that drove reliability and responsiveness.
• Strong ownership mindset and collaborative partnership across cross-functional stakeholders.
• Experience mentoring and growing engineers up to Staff level.
• Strong verbal and written communication skills.
• Either equivalent practical experience or a Bachelor’s degree in a related field.