RadixArk builds large-scale inference and training systems for the entire AI community, making frontier-level AI infrastructure open and accessible. Backed by Accel.
About the role
RadixArk is looking for a Member of Technical Staff — Backend/API Platform Engineer to build the API layer, control plane, and platform services that power SGLang and Miles in production. You'll design and implement the REST/gRPC APIs, authentication systems, multi-tenancy isolation, and monitoring infrastructure that thousands of developers and companies rely on. This role bridges high-performance inference/training systems with production-grade platform engineering.
What they're looking for
- Debug production issues and implement reliability improvements
More about this role
RadixArk is looking for a Member of Technical Staff — Backend/API Platform Engineer to build the API layer, control plane, and platform services that power SGLang and Miles in production. You'll design and implement the REST/gRPC APIs, authentication systems, multi-tenancy isolation, and monitoring infrastructure that thousands of developers and companies rely on. This role bridges high-performance inference/training systems with production-grade platform engineering.
4+ years experience building production backend systems, APIs, or platform infrastructure
Bachelor's or Master's degree in Computer Science, Engineering, or equivalent industry experience
Strong proficiency in Python, Go, or Rust with production-quality code standards
Experience designing and building REST/gRPC APIs at scale
Solid understanding of distributed systems, databases, caching, and message queues
Experience with authentication, authorization, rate limiting, and multi-tenancy
Familiarity with cloud platforms (AWS, GCP, Azure) and Kubernetes
Experience with monitoring and observability tools (Prometheus, Grafana, DataDog)
Understanding of ML serving infrastructure or high-throughput systems is a plus
Design...
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