Language Lead – French

Cartesia

French Language Lead improving Cartesia’s voice AI through linguistic evaluation, annotation QA, and dataset auditing. Owning French-language quality, TTS assessment, and annotator calibration for AI products.

Posted 8/5/2026contractRemote • 🇺🇸 United StatesSenior💰 $25 - $35 per hourWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates native-level proficiency in French and strong written English skills, with a solid foundation in linguistics. Capable of managing annotation quality, providing actionable feedback, and developing guidelines for language evaluation projects.

Highest-signal resume keywords

Native-Level Proficiency In FrenchData Annotation ExperienceLinguistics FoundationQuality Assurance SkillsExperience With TTS Or STT

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Data AnnotationTranscriptionLanguage Quality AssurancePhoneticsProsody EvaluationIntonation ApplicationAnnotation Guidelines DevelopmentQA ReportingAudit Data ManagementInter-Rater Agreement Scores

Soft Skills

Clear Instruction WritingActionable Feedback DeliverySelf-Directed ManagementCollaboration With Remote TeamsMentoring Or Training Experience

Tools & Technologies

Audit SpreadsheetsStructured Feedback TemplatesCalibration Meeting ToolsAnnotation Software

Industry Keywords

Voice AITTSSTTLinguistic AccuracyAnnotation QualityData ProjectsCustomer-Reported Issues

About the role

Key responsibilities & impact

Serve as the primary language resource and trusted point of contact for French voice AI work
Manage annotation quality, audit data, monitor product performance, investigate customer-reported issues, and execute linguistically complex projects
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
Review annotator-rated audio and assess alignment with rubrics
Prepare written quality assessments with examples and recommendations
Evaluate TTS pronunciation, prosody, and naturalness in French
Update and expand annotation guidelines
Run calibration meetings and office hours
Develop onboarding materials for annotators
Write QA reports on annotation quality and calibration outcomes
Review production audio and flag quality issues
Investigate customer-reported language issues and identify root causes
Audit datasets for linguistic accuracy, completeness, and consistency

Requirements

What you’ll need

Native-level proficiency in French as spoken in France
Experience with data annotation, transcription, or language quality assurance
Strong foundation in linguistics or a related field
Ability to apply phonetics, prosody, and intonation when evaluating speech and writing annotation guidelines
Strong written English proficiency
Ability to write clear, structured instructions and deliver specific, actionable feedback
Comfortable working with 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
Roughly 40 hours per week availability with flexibility in scheduling
Availability for coordination meetings and schedule overlap during US Pacific business hours
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
Must supply own equipment and be responsible for own taxes

Benefits

Comp & perks

Ongoing contractor engagement, renewable by mutual agreement
Flexible scheduling
Control over own methods for completing assigned work
Competitive base salary alongside attractive equity package (US Employees Only benefits section)
Fully covered medical insurance along with dental and vision for you and your family (US Employees Only)
9 weeks paternity & 12 weeks maternity leave (US Employees Only)
401(k) (US Employees Only)
Monthly commuter allowance (US Employees Only)
Flexible PTO (US Employees Only)
Lunch, dinner and plenty of snacks, provided daily (US Employees Only)
Your own personal Yoshi (US Employees Only)
Visa sponsorship support assessed case-by-case