Senior Full-Stack Engineer: Lead Mobile & Backend (Remote)

Affirm, Inc.; United States; On-site; USD 173,000 - 233,000; Full time

Benefits offered by this job

Remote-first

Health benefits

Competitive compensation

Equity / ESPP

Job summary

Affirm is seeking a Senior Full Stack Software Engineer to join the Acquisition & Onboarding team within the Consumer org. This is a high-impact role guiding technical direction across mobile, web, and backend systems to shape the first experience customers have with Affirm, driving trust, clarity and value from the initial interaction.

You will mentor senior engineers, define long-term technical strategy, and partner with product, design, and analytics to deliver polished, performant, and

Qualifications

• Minimum 4+ years of software engineering experience.
• Experience leading mobile initiatives and cross-functional teams.
• Proficiency in React Native, backend services, and scalable architectures.
• Strong communication and mentorship abilities.

Responsibilities

• Own quarterly goals and guide team through ambiguity.
• Collaborate with product, design, and analytics across the lifecycle.
• Ensure monitoring, on-call readiness and reliability.
• Lead architecture discussions and improve code quality.
• Mentor engineers and promote best practices.

Skills

React Native

Leadership

Cross-functional collaboration

Communication skills

Education

Bachelor’s degree or equivalent practical experience

Tools

Python

Kotlin

AWS

MySQL

Kubernetes

Job description

Affirm is seeking a Senior Full Stack Software Engineer to join the Acquisition & Onboarding team within the Consumer org. This is a high-impact role guiding technical direction across mobile, web, and backend systems to shape the first experience customers have with Affirm, driving trust, clarity and value from the initial interaction.

You will mentor senior engineers, define long-term technical strategy, and partner with product, design, and analytics to deliver polished, performant, and