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Senior Software Engineer, Backend (Partner Merchant Interface)

🌐 Remote💼 Full-time💰 $195,000–$195,000🗓 2026-09-09 → 2026-09-26

Core

Designing, developing, and launching backend systems at scale for APIs that enable partners and merchants to integrate with Affirm's 'buy now, pay later' platform.

Role type

Senior IC backend software engineer (distributed systems)

Builds

Scalable integration APIs for partners like Amazon and Stripe

Domain

Fintech / Buy Now Pay Later / Distributed Systems

Deliverable

production ML models | product features

Required skills

Python or Kotlin, distributed systems architecture, AWS, MySQL, Kubernetes, system design, code review, debugging

Preferred skills

None stated

Technologies

Python, Kotlin, AWS, MySQL, Kubernetes

Responsibilities

Design and launch backend systems at scale, collaborate with stakeholders on risks and trade-offs, balance speed and quality to protect system uptime, navigate large codebases and provide feedback via code reviews

Seniority

Senior, hands-on IC

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