People & Talent Lead

About the Role

We're looking for a People & Talent Lead to build our People and Recruiting function from the ground up. This is a true 0-to-1 role — you won't be inheriting a playbook, you'll be writing it. You'll own the full recruiting lifecycle across engineering, research, and AI roles, while simultaneously standing up the HR operations, compensation, benefits, and people analytics infrastructure that will carry us through the next phase of growth.

You'll report directly to the Head of Finance & Operations and work in close partnership with the founders. This is a rare opportunity to define what "great" looks like for People at RadixArk — and to build it yourself.

This role is not for the faint of heart. We move fast, operate with a sense of urgency, and expect the same from everyone on the team.

What You'll Own

Recruiting

• Full-cycle recruiting for engineering, research, and AI roles — from sourcing and outreach to offer and close
• Sourcing strategy — proactively building pipelines through LinkedIn, referrals, university networks, and creative outreach
• Candidate experience — managing communication and keeping candidates warm and engaged throughout the process
• Recruiting ops — owning our ATS, tracking pipelines, and reporting on hiring metrics

People Operations

• HR operations — onboarding, offboarding, maintaining employee records, and building lightweight but scalable HR processes
• Compensation & offers — designing our comp philosophy, building salary bands, and owning the offer process end to end
• Benefits — selecting and managing our benefits programs and vendors as we scale
• People analytics — building the reporting and dashboards that give leadership visibility into headcount, hiring velocity, and workforce trends

Compliance & Legal Coordination

• Coordinating with legal on immigration, compliance, and employment matters (H-1B, O-1, etc.)

Who You Are

• You are available for a full‑time, onsite schedule (5 days per week) at our Palo Alto office.
• 5+ years of full-cycle recruiting experience, with meaningful time at a startup or high-growth tech company
• You've hired for technical and research roles (engineers, ML researchers, etc.) and know what great looks like
• Experience standing up or significantly building out a People function — you've done more than just recruit
• Comfortable owning comp, benefits, and HR ops, not just the top of funnel
• Scrappy, resourceful, and highly responsive — you treat recruiting like a competitive sport
• Strong organizational skills and able to juggle multiple open roles and operational workstreams simultaneously
• Low ego, high output — you do what it takes to get the right people in the door and keep them there
• Experience with immigration processes (H-1B, O-1) a strong plus

 

About RadixArk

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).

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 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.

Compensation

We offer competitive compensation with meaningful equity, comprehensive benefits, and flexible work arrangements. Compensation depends on location, experience, and level.

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.