Remote Senior Backend Engineer, AI Platform & Gateways

Royper Royco LLC; United States; Remote; USD 173,000 - 255,000; Full time

Benefits offered by this job

Health coverage

Tech stipends

Flexible time off

Employee stock purchase plan

Disability accommodations

Job summary

Affirm is building a scalable AI Platform to govern AI workloads across millions of users. We seek a backend engineer to design gateway, runtime, and evaluation services enabling pilots to production with secure scaling and governance.

You will own technical decisions, collaborate with security and product teams, and mentor engineers while delivering reliable, observable systems. This remote-first role in the United States offers flexibility and strong benefits.

Qualifications

• Proven backend design and scalable systems experience with Python or Kotlin.
• Experience building highly available distributed systems using AWS and MySQL.
• Practical experience with LLMs, agents, or AI frameworks in production.
• Understanding AI infrastructure to support cross-disciplinary workloads.
• Defined technical plans for delivering significant features with simple, extensible design.

Responsibilities

• Plan, execute, and own technical decisions and projects within the AI Platform team.
• Design and build gateway, runtime, and evaluation services for AI workloads.
• Implement identity, quotas, routing, caching, and failover controls.
• Partner with security, infra, and product teams to set guardrails for agent workloads.
• Create and monitor metrics; own operational health, monitoring, and runbooks.
• Set and improve code review and design standards; share through talks.
• Use AI tools daily to amplify coding, reviews, and ops.
• Educate, mentor, and grow engineers in the team.

Skills

Backend design and scalability

Python or Kotlin

Distributed systems

AWS

MySQL

Kubernetes

LLMs / AI frameworks

Code review & design standards

Communication

Education

Bachelor's degree or equivalent practical experience

Tools

LiteLLM gateway tooling

MCP gateway tooling

Job description

Affirm is building a scalable AI Platform to govern AI workloads across millions of users. We seek a backend engineer to design gateway, runtime, and evaluation services enabling pilots to production with secure scaling and governance.

You will own technical decisions, collaborate with security and product teams, and mentor engineers while delivering reliable, observable systems. This remote-first role in the United States offers flexibility and strong benefits.