Senior Software Engineer, Backend (Merchant Advocacy)

About This RoleAI processing…

Key Responsibilities

• 1
  Design & expand the backbone of our platform to scale to hundreds of thousands of merchants from all around the world
• 2
  Design and align the scope of work with other teams to deliver cross-team projects
• 3
  Mentor other engineers to ensure their development & growth
• 4
  Partner with Engineering Manager and Team Lead to drive and execute the long-term vision of the team
• 5
  Execute technical strategy for broad or complex requirements with insightful and forward-looking approaches that go beyond the direct team and solve large open-ended problems
• 6
  Utilize agentic development tools like Claude Code to automate parts of the development process
• 7
  Improve engineering standards, tooling, and processes throughout the organization
• 8
  5+ years of experience as a backend software engineer
• 9
  A strong understanding of Domain-Driven Design, distributed systems, and how architectural decisions affect performance and maintainability
• 10
  Proficiency with data models, API design (http and RPC), state machines, event-driven architecture, and database design
• 11
  Excellent communication skills, both written and verbal. Must be proficient in asynchronous communication–written tech specs, ADRs, project plans, etc.
• 12
  Experience designing, developing, and launching backend systems (our stack: AWS, gRPC, Snowflake, Kotlin, Python, MySQL, Kubernetes). Java and Kotlin experience are especially helpful.
• 13
  Prior experience with monitoring and alerting systems ( sentry.io , rollbar, chronosphere, kibana)

Requirements

• 5+ years of experience as a backend software engineer
• Proficiency with data models, API design (http and RPC), state machines, event-driven architecture, and database design
• Excellent communication skills, both written and verbal. Must be proficient in asynchronous communication–written tech specs, ADRs, project plans, etc.
• Prior experience with monitoring and alerting systems ( sentry.io , rollbar, chronosphere, kibana)
• Must be proficient in asynchronous communication–written tech specs, ADRs, project plans, etc.
• Affirmers in proximal roles have the flexibility to work remotely, but will occasionally be required to work out of their assigned Affirm office.
• By clicking "Submit Application," you acknowledge that you have read Affirm's Global Candidate Privacy Notice and hereby freely and unambiguously give informed consent to the collection, processing, use, and storage of your personal information as described therein.

Perks & Benefits