Senior Software Engineer, Full Stack

About the Role

Join Affirm's Zero To One (ZT1) innovation lab as a Senior Software Engineer to rapidly prototype and build AI-native solutions, directly influencing new business ventures.

Responsibilities

• Own and deliver quarterly team goals, guiding engineers through complex, open-ended problems.
• Collaborate with product management, design, and analytics to define technical approaches, identify risks, and make informed decisions.
• Proactively identify and lead the resolution of project, process, technology, or business issues.
• Support the operational health of team artifacts through monitoring, metrics, and on-call efforts.
• Foster a culture of quality and ownership by setting and improving team standards for code reviews and design.
• Contribute to talent development on the team through feedback, guidance, and leading by example.

Requirements

• 4+ years of experience as a software engineer.
• Proven experience designing, developing, and launching backend systems at scale using technologies like Python, Kotlin, AWS, MySQL, and Kubernetes.
• Experience shipping web applications using declarative UI frameworks such as React or Vue.
• Strong experience leveraging AI tools, agentic coding workflows, and automation to accelerate development, prototyping, and problem-solving.
• Ability to define technical plans for significant features or system components with elegant, simple, and extensible designs.
• Proficiency in making substantial changes in large codebases and developing tools/practices for safe modifications.
• Demonstrated ownership of personal growth, proactively seeking feedback.
• Strong verbal and written communication skills for effective collaboration.
• Equivalent practical experience or a Bachelor’s degree in a related field.

Nice-to-Haves

• Experience working in an AI-centric, rapid prototyping environment.
• An eye for product and design, with the ability to translate ideas into functional prototypes.
• Comfort with ambiguity and a drive to move quickly with end-to-end ownership.