Joining the Product Research and Operations (PRO) team, you will manage voice library operations and production workflows. You’ll become a key expert in audio quality annotation and support critical research objectives. This hands-on role involves working closely with synthetic voice creation to ensure Cartesia’s models meet the highest possible standards for quality and performance.
Analyst Contractor at Cartesia
Join Cartesia, a frontier AI research lab founded by the Stanford PhDs who invented State Space Models (SSMs). As an Analyst Contractor based in our London Soho HQ, you will play a pivotal role in shaping the future of real-time synthetic voice and interactive intelligence. Backed by industry giants like Index Ventures, Lightspeed, and NVIDIA, this role offers a high-throughput environment for those with a research-driven mindset and strong technical foundations.
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Location
London, United Kingdom
Compensation
£35/hr
Company
Cartesia
Role overview
Software
Cartesia is an AI company building the fastest and most accurate models for real-time voice- offering Sonic for text-to-speech, Ink for speech-to-text, and LineVoice agents for automated conversational AI applications across finance, healthcare, and enterprise customer service. Backed by $36M in a Series A, the company is working on the fundamental models that make human-like AI interaction possible at low latency and production reliability. Cartesia careers attract researchers and engineers who want to work on foundational voice AI challenges and push the boundaries of what’s possible in real-time speech; Cartesia job openings are for people who value technical honesty, collaborative problem-solving, and the ambition to build AI voice infrastructure that the rest of the industry will build on.
What you will do
- Manage end-to-end voice library operations, including posting job ads for voice actors, managing professional engagements, and maintaining strict quality timelines.
- Execute complex voice production workflows, specifically focusing on the creation and rigorous quality evaluation of synthetic voices through specialized annotation.
- Support core research and analysis objectives within the voice domain, tackling ad-hoc operational tasks that require high flexibility and reliability.
Who this is a fit for
- Strong project management instincts with the ability to juggle multiple workstreams and high-throughput operational tasks without letting details slip through the cracks.
- Technical fluency including a solid understanding of how APIs work, practical experience with LLMs, and basic proficiency in Python or SQL.
- A research-driven and curious mindset, comfortable digging into data and using AI coding assistants like Cursor or Claude to rapidly execute high-quality results.
Why this role is remarkable
- Work at a frontier AI lab founded by the inventors of State Space Models (SSMs), a revolutionary alternative to Transformers for efficient, large-scale foundation models.
- Join a highly-backed team supported by top-tier investors like Index Ventures, Lightspeed, and NVIDIA, contributing to products like Sonic that power millions of real-time conversations.
- Enjoy a high-impact, operationally intense role where your work directly shapes the quality and development of cutting-edge synthetic voice and speech-to-text technologies.
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I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
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