Chief of Staff / Strategic Executive Assistant

<h2>About the Role</h2> <p>We’re looking for a Chief of Staff / Strategic Executive Assistant to partner directly with our founders and help scale the company through its next stage of growth. This is not a traditional Executive Assistant role. You'll be a trusted operator responsible for helping leadership stay focused on the highest-impact priorities while driving execution across the business.</p> <p>You'll own a mix of executive operations, strategic projects, cross-functional coordination, recruiting support, and company operations. One moment you may be preparing materials for an investor meeting; the next, coordinating an important hiring process, improving an internal workflow, or driving a cross-functional initiative to completion.</p> <p>You’ll report directly to the Head of Finance &amp; Operations and work closely with the founders and leadership team. This is a unique opportunity to build the operational backbone of a fast-growing AI infrastructure company.</p> <p>We move quickly, operate with urgency, and expect the same from everyone on the team.</p> <h2>What You'll Own</h2> <h3>Executive Partnership</h3> <p>Manage complex calendars, meetings, travel, and shifting priorities for company leadership</p> <p>Prepare agendas, briefing materials, meeting notes, and follow-up action items to ensure decisions turn into execution</p> <p>Anticipate bottlenecks, proactively solve scheduling conflicts, and optimize executive time</p> <p>Handle confidential information with professionalism and sound judgment</p> <h3>Strategic Operations</h3> <p>Drive cross-functional projects that require coordination across engineering, research, recruiting, finance, and operations</p> <p>Track company priorities, key initiatives, and executive action items to ensure timely execution</p> <p>Support board meetings, investor updates, leadership offsites, and strategic planning efforts</p> <p>Research, synthesize information, and prepare presentations, reports, and internal documentation</p> <h3>Recruiting &amp; People Operations</h3> <p>Partner with hiring managers to coordinate executive hiring and other key recruiting efforts</p> <p>Help deliver an exceptional candidate experience from scheduling through onboarding</p> <p>Support employee onboarding, internal communications, and company-wide operational initiatives</p> <p>Assist with planning team events, offsites, and culture-building activities</p> <h3>Company Operations</h3> <p>Identify opportunities to improve internal processes and increase organizational efficiency</p> <p>Help build scalable operational systems as the company grows</p> <p>Coordinate with external vendors, partners, and service providers when needed</p> <p>Take ownership of high-priority special projects that support company growth</p> <h2>Who You Are</h2> <p>Available for a hybrid schedule with 3 days per week onsite at our Palo Alto office</p> <p>3–7 years of experience as a Chief of Staff, Executive Assistant, Strategic Operations, Program Manager, Management Consultant, or similar role</p> <p>Bachelor's degree required</p> <p>Exceptional organizational and project management skills with the ability to manage multiple priorities simultaneously</p> <p>Excellent written and verbal communication skills</p> <p>Highly proactive—you identify problems before they become blockers and consistently follow through</p> <p>Comfortable operating independently in an ambiguous, fast-changing startup environment</p> <p>Strong business judgment and the ability to handle confidential information with discretion</p> <p>Experience supporting founders or senior executives at a high-growth technology company is strongly preferred</p> <p>Low ego, high output—you enjoy rolling up your sleeves and doing whatever is needed to help the company succeed</p> <p>Integrity-first: we place a high premium on character, trustworthiness, and sound judgment in this role</p> <h2>About RadixArk</h2> <p>RadixArk is an infrastructure-first company built by engineers who’ve shipped production AI systems, created SGLang (20K+ GitHub stars, the fastest open LLM serving engine), and developed Miles (our large-scale RL framework).</p> <p>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.</p> <p>We’re backed by well-known infrastructure investors and partner with Nvidia, Google, AWS, and frontier AI labs. Join us in building infrastructure that gives real leverage back to the AI community.</p> <h2>Compensation</h2> <p>We offer competitive compensation with meaningful equity, comprehensive benefits, and flexible work arrangements. Compensation depends on location, experience, and level.</p> <h2>Equal Opportunity</h2> <p>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.</p>