About The Role
RadixArk is seeking an Office Manager to create a productive, welcoming environment for our engineering-focused team in San Francisco. You'll manage day-to-day office operations, coordinate team events, support travel and logistics, and ensure our office runs smoothly so engineers can focus on building world-class AI infrastructure. This role is ideal for someone who thrives in fast-paced startup environments and enjoys being the operational backbone of a technical team.
Requirements
3+ years of experience in office management, operations coordination, or executive support roles
Proven ability to manage multiple priorities and projects simultaneously in a startup or high-growth environment
Strong organizational skills with excellent attention to detail and follow-through
Excellent written and verbal communication skills
Proficiency with Google Workspace, Slack, expense management tools, and basic project management software
Self-starter who can anticipate needs and solve problems independently
Comfortable working in a technical environment and learning basic infrastructure concepts
Experience supporting engineering teams is a plus
Responsibilities
Manage day-to-day office operations: supplies, vendors, equipment, facilities coordination
Coordinate team events, offsites, and social activities that build culture and team cohesion
Support travel logistics for the team: booking flights, accommodations, conference registrations
Manage relationships with building management, vendors, and service providers
Handle expense reporting, invoice processing, and budget tracking for office operations
Coordinate onboarding logistics for new hires: workspace setup, equipment provisioning, office orientation
Maintain office documentation: vendor contacts, procedures, emergency protocols
Support executive team with calendar management, meeting coordination, and administrative tasks as needed
Partner with HR and Finance on operational workflows and process improvements
Create a welcoming, productive environment that reflects RadixArk's engineering-first culture
About RadixArk
RadixArk is an infrastructure-first company built by engineers who've shipped production AI systems at xAI, created SGLang (20K+ GitHub stars, the fastest open LLM serving engine), and developed Miles (our large-scale RL framework). We're on a mission to democratize frontier-level AI infrastructure by building world-class open systems for inference and training. Our team has optimized kernels serving billions of tokens daily, designed distributed training systems coordinating 10,000+ GPUs, and contributed to infrastructure that powers leading AI companies and research labs. We're backed by well-known investors in the infrastructure field and partner with Google, AWS, and frontier AI labs. Join us in building infrastructure that gives real leverage back to the AI community.
Compensation
We offer competitive compensation with equity, comprehensive health benefits, and flexible work arrangements. Compensation is determined by location, level, and experience.
Equal Opportunity
RadixArk is an Equal Opportunity Employer and is proud to offer equal employment opportunity to everyone regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, veteran status, and more.
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