Frontier
Sieve

Technical Recruiter

📍San Francisco
YCYC W22PeopleFull Time

About

ABOUT US Sieve is a multi-modal lab curating the world's highest-quality training datasets — spanning video, audio, images, text, and 3D. We combine exabyte-scale data infrastructure and novel multimodal understanding techniques that push the frontier of foundation models. Video alone makes up 80% of internet traffic, and across modalities, data has become the enabling medium powering creativity, communication, gaming, AR/VR, and robotics. Sieve exists to solve the biggest bottleneck in the growth of these applications: high-quality training data. We partner with top AI labs and did $XXM last quarter alone, as a team of ~30 people. We also raised our Series A from Tier 1 firms such as Matrix Partners https://matrix.vc/, Swift Ventures https://www.swift.vc/, Y Combinator https://www.ycombinator.com/, and AI Grant https://aigrant.com/.   WHY NOW Sieve is one of the most capital-efficient teams in AI - roughly 30 people serving the world's leading AI labs across every major data modality. You'll join early, own problems end-to-end, and the hires you make will help define the future of multimodal models. ABOUT THE ROLE As a Full-Cycle Technical Recruiter, you'll own recruiting for engineering and product roles across Sieve. You'll source technical candidates via LinkedIn and web-based sourcing, run screening calls, manage our Ashby pipeline, coordinate interviews, and close offers. This isn't a back-office role - you'll work directly with hiring managers to understand what we need, own the candidate experience end-to-end, and build the processes and templates that make recruiting scalable as we grow. REQUIREMENTS - This role requires you to be in-person 5 days a week - 3+ years of technical sourcing or recruiting experience (engineering focus) - Elite Ashby experience - you know the platform inside out and can optimize workflows, manage integrations, and pull reporting - Strong technical sourcing skills - you can find engineers on LinkedIn/GitHub/the web and know how to assess technical fit quickly - Ability to screen technical candidates and provide meaningful feedback to hiring managers - Clear, direct communication - both with candidates and internal stakeholders - Ownership mindset - bias towards action, you see what needs to happen and do it - Comfort with ambiguity and rapid context-switching in a fast-growing startup BONUS - Direct hiring experience for MLEs and/or Forward Deployed Engineers - Early hire at a startup (understands the challenge of scaling from 5 → 50 people) - Exploring AI as an accelerant for sourcing, screening, and/or recruiting ops BENEFITS - 401k + Full Health Insurance - Breakfast, Lunch, and Dinner covered and your choice of snacks - Ubers covered home Open to candidates who are strong technical sourcers willing to grow into full-cycle

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Aggregated by Frontier · Posted August 4, 2026