Backend Engineer

Backend Engineer (API Gateway + Routing + Rate Limiting)

Location:
Tokyo / Remote

Team:
Product Engineering / Core Services

Salary range:
$5,153 - $5,898/month USD

Role Overview

As a Backend Engineer for API Gateway and Core Services, you will build the control-plane and gateway layer that sits between customers and our serving infrastructure. You will own authentication and tenancy boundaries, request validation, routing to the right model endpoints, quota and rate limit enforcement, and reliability mechanisms that keep the platform stable under load. This role is not just building endpoints—it is building a platform interface that is secure-by-default, abuse-resistant, and operable at scale.

You will collaborate with serving/runtime engineers, infrastructure operations, and networking to ensure routing decisions reflect real capacity and failure domains, and that the system exposes the right telemetry for rapid debugging.

R...