Member of Technical Staff — Backend/API Platform

Palo Altofull timeOn Site

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senior

$200k–$400k

H1B: no

Radixark The Member of Technical Staff — Backend/API Platform at RadixArk designs and builds production APIs, authentication systems, and platform services supporting AI inference and training infrastructure. This role involves ensuring API reliability, security, and performance at scale.

Responsibilities

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.
Design and build production APIs for SGLang and Miles: REST/gRPC endpoints, client SDKs, API versioning
Implement authentication, authorization, and rate limiting systems for multi-tenant deployments
Build control plane infrastructure: job scheduling, resource allocation, model deployment management
Create monitoring, logging, and observability systems for production inference and training workloads
Design and implement billing integration, usage tracking, and quota management
Build management dashboards and admin tools for cluster operations
Ensure API reliability, performance, and security at scale
Implement multi-tenancy isolation and security boundaries
Create deployment automation, CI/CD pipelines, and rollback procedures
Write comprehensive API documentation and integration guides
Partner with Systems Engineers to optimize end-to-end latency from API → serving layer

Qualification

Strong proficiency in PythonExperience with authenticationFamiliarity with cloud platforms (AWS

Required

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

Preferred

Understanding of ML serving infrastructure or high-throughput systems

Benefits

Equity/RSU

Company

Radixark

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Source: ashby

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Must-Have Skills for This Role

PythonGoRustREST APIsgRPCauthentication

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