Language Lead – Japanese

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🔥 3 hours ago

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Cartesia

WebsiteLinkedInAll Job Openings

11 - 50 employees

🤖 Artificial Intelligence

☁️ SaaS

Artificial Intelligence • SaaS

Cartesia is dedicated to developing the next generation of artificial intelligence that is ubiquitous and interactive, providing real-time multimodal intelligence accessible on various devices. With a mission focused on enhancing user experience, Cartesia invites users to try their product, Sonic, through their website and engage with their community on Discord.

📋 Description

• Serve as the primary language resource and trusted point of contact for Japanese voice AI work • Coordinate with the Human Evals Manager on project deliverables and timelines • Answer annotator questions about guidelines, edge cases, and language-specific issues • Cascade feedback, instructions, and rubric updates to annotators • Audit annotator-rated audio and assess alignment with rubrics • Prepare written quality assessments with examples and recommendations • Evaluate TTS pronunciation, prosody, and naturalness in Japanese • Update and expand annotation guidelines for gaps and edge cases • Run calibration meetings and office hours for annotators • Develop onboarding materials for new annotators • Write QA reports on annotation quality and calibration outcomes • Review production audio and flag quality issues • Investigate customer-reported language-specific issues and identify root causes • Audit datasets for linguistic accuracy, completeness, and consistency

🎯 Requirements

• Native-level proficiency in Japanese as spoken in Japan • Experience with data annotation, transcription, or language quality assurance • Strong foundation in linguistics or a related field • Ability to apply phonetics, prosody, and intonation concepts when evaluating speech and writing guidelines • Strong written English proficiency • Ability to write clear, structured instructions and deliver actionable feedback • Comfort working with data and metrics such as inter-rater agreement scores, audit spreadsheets, and structured feedback templates • Self-directed ability to manage feedback cycles, QA reviews, and data projects without close oversight • Availability roughly 40 hours per week with scheduling flexibility • Availability during some US Pacific business hours for coordination meetings and real-time support • Must be authorized to work in your country of residence • Preferred: experience writing or maintaining annotation guidelines or rubrics • Preferred: experience training, mentoring, or managing annotators • Preferred: experience with audio evaluation, TTS, or STT • Preferred: conversational spoken English proficiency for meetings and calibration syncs • Preferred: experience working with distributed, remote teams

🏖️ Benefits

• Ongoing contractor engagement, renewable by mutual agreement • Flexible scheduling • Control over methods for completing assigned work • Remote work arrangement • Competitive base salary • Attractive equity package (listed under US Employees Only and not applicable to this 1099 contract) • Fully covered medical, dental, and vision insurance for employees and family (US Employees Only; not applicable to this contract) • 9 weeks paternity leave and 12 weeks maternity leave (US Employees Only; not applicable to this contract) • 401(k) (US Employees Only; not applicable to this contract) • Monthly commuter allowance (US Employees Only; not applicable to this contract) • Flexible PTO (US Employees Only; not applicable to this contract) • Lunch, dinner, and snacks provided daily (US Employees Only; not applicable to this contract) • Your own personal Yoshi (US Employees Only; not applicable to this contract)