About Cartesia

Our mission is to architect AI that learns from and interacts with the world like humans do.

We're pioneering the model architectures that will make this possible. Our founding team met as PhDs at the Stanford AI Lab, where we invented State Space Models or SSMs, a new primitive for training efficient, large-scale foundation models. Our team combines deep expertise in model innovation and systems engineering paired with a design-minded product engineering team to build and ship cutting edge models and experiences.

We're funded by leading investors at Index Ventures and Lightspeed Venture Partners, along with Factory, Conviction, A Star, General Catalyst, SV Angel, Databricks and others. We're fortunate to have the support of many amazing advisors, and 90+ angels across many industries, including the world's foremost experts in AI.

The Role

We are looking for a Human Data Operations Manager to design, scale, and operate Cartesia's global scaled evaluation workforce. This role sits at the intersection of product operations, data operations, and vendor management, and directly impacts model quality and customer outcomes. You will own the end-to-end workforce system: hiring pipelines, vendor strategy, workforce planning, quality control, and operational performance.

You are building a production system of humans-in-the-loop for AI, translating ambiguous product needs into operational workflows and partnering across product, engineering, data, and customer-facing teams to support real-world evaluation at scale.

Your Impact

• Design and implement workforce structure across languages, skill tiers, and use cases, including evaluators, auditors, and leads for TTS products

• Build capacity models to support continuous eval pipelines and data production workflows

• Own relationships with vendors such as data annotation firms and contractor platforms, negotiating rate cards, SLAs, and throughput guarantees

• Decide on build, buy, or hybrid workforce models and continuously benchmark cost and performance across regions

• Design multi-layer QA systems spanning self-checks, peer review, audits, and gold tasks

• Define and track inter-rater reliability, error rates by category, and annotator-level performance distributions

• Build escalation and retraining workflows to maintain quality at scale

• Run day-to-day operations including task allocation, throughput tracking, and SLA adherence

• Build systems to reduce evaluator fatigue, rotate task types, and maintain consistency across large-scale evaluations

• Partner with tooling teams to improve evaluator UX and with data teams to ensure clean, structured outputs for model training

What You Bring

• 5+ years in operations, workforce management, or data annotation systems

• Experience managing large contractor or vendor-based workforces

• Proven ability to scale operations from zero to production

• Systems thinking with the ability to design scalable operational frameworks

• Strong analytical skills with comfort around metrics like inter-rater reliability, precision, and throughput

• Ability to execute quickly under ambiguity with close attention to quality and edge cases

Nice to Have

• Experience in AI/ML data operations or evaluation pipelines

• Background in audio, speech, or language-related workflows

• Familiarity with QA systems and annotation tooling

• Experience with marketplace platforms such as Upwork or Mercor

• Exposure to multilingual operations

More Details

🏢 In-office policy: We’re an in-person team based out of offices in 🇺🇸 San Francisco, 🇬🇧 London and 🇮🇳 Bangalore. We love being in the office, hanging out together, and learning from each other every day.

🌎 Visa sponsorship: We provide visa sponsorship support and assess each circumstance on a case-by-case basis. However, visa sponsorship is dependent on many factors, including the role you are applying for, and the location you are going to be based, and so we can't always guarantee success. Your Recruiter will work with you to understand your visa sponsorship needs from the first call.

🚢 We ship fast. All of our work is novel and cutting edge, and execution speed is paramount. We have a high bar, and we don’t sacrifice quality or design along the way.

🤝 We support each other. We have an open & inclusive culture that’s focused on giving everyone the resources they need to succeed.

Our Benefits (US Employees Only)

💰 Compensation. Competitive base salary alongside attractive equity package.

🩺 Health Insurance. Fully covered medical insurance along with dental and vision for you and your family.

🏦 401(k)

🚆 Commuter Allowance. A monthly stipend to help you get to and from the office.

🏖️ Flexible PTO. Take as much time as you need to recharge your batteries.

🍲 Meals & Snacks. Lunch, dinner and plenty of snacks, provided daily.

🦖 Your own personal Yoshi.