Software Engineer II, Backend (Merchant & Partner Lifecycle)

About the role

The Merchant & Partner Lifecycle (M&PL) team is transforming Affirm's architecture to address critical risks and consolidate merchant lifecycle orchestration. You will lead the development of a new lifecycle-orchestrator service, focusing on scalability, performance, and modernization.

Responsibilities

• Design and expand the backbone of our platform to scale to hundreds of thousands of merchants from around the world
• Partner with Engineering Manager and Team Lead to execute the long-term vision of the team
• Execute technical strategy for broad or complex requirements with insightful and forward-looking approaches
• Improve engineering standards, tooling, and processes throughout the organization

Requirements

• 3+ years of experience as a backend software engineer
• Familiarity with Domain-Driven Design, distributed systems, and how architectural decisions affect performance and maintainability
• Experience with concepts such as data models, API design (HTTP and RPC), state machines, event-driven architecture, and database design
• Excellent communication skills, both written and verbal
• Proficient in asynchronous communication—written tech specs, ADRs, project plans, etc.
• Experience designing, developing, and launching backend systems (our stack: AWS, gRPC, Snowflake, Kotlin, Python, MySQL, Kubernetes)
• Java and Kotlin experience are especially helpful
• Prior experience with monitoring and alerting systems (Sentry.io, Rollbar, Chronosphere, Kibana)

Qualifications

• Equivalent practical experience or a Bachelor’s degree in a related field

Skills

• Agentic development tools like Claude Code

Benefits

• Base Pay Grade - L
• Equity Grade - 6
• Simple and transparent pay structure based on a variety of factors including location, experience, and job-related skills
• USA base pay range (CA, WA, NY, NJ, CT) per year: $165,000 - $225,000
• USA base pay range (all other U.S. states) per year: $146,000 - $206,000
• Remote-first company with flexible working arrangements
• Competitive benefits package including health care coverage, flexible spending wallets, time off, ESPP, and more