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Speech Annotation Jobs in California (NOW HIRING)

SpaceXAI

AI Tutor - Danish

Palo Alto, CA · On-site

SpaceXAI's mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. Our team is small, highly motivated, and focused on engineering

Sesame

Technical Program Manager, Data

San Francisco, CA · On-site

$152K - $196K/yr

Job Summary : Sesame is a company focused on creating lifelike computers that can interact naturally with humans. They are seeking a Senior Technical Program Manager to lead their data collection and

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All JobsSpeech Annotation JobsSpeech Annotation Jobs in California

Speech Annotation information

What are some common challenges faced by professionals in speech annotation roles, and how can they be managed?

Speech Annotation professionals often encounter challenges such as distinguishing between overlapping speakers, accurately transcribing accented or low-quality audio, and adhering to strict annotation guidelines. Managing these challenges requires strong attention to detail, patience, and effective use of annotation tools. Collaborating closely with team members and participating in regular quality reviews can help maintain consistency and accuracy across projects. Staying up-to-date with evolving annotation standards and seeking feedback are also key to overcoming common obstacles in this role.

What is the difference between Speech Annotation vs Speech Data Labeler?

AspectSpeech AnnotationSpeech Data Labeler
Required CredentialsBasic computer skills, sometimes familiarity with transcription toolsSimilar; often no formal degree required
Work EnvironmentRemote or office-based, working with audio files and annotation softwareRemote or office-based, focusing on labeling speech data
Industry UsageUsed in speech recognition, NLP, AI trainingUsed in speech recognition, AI, and machine learning projects
Common Search IntentUnderstanding roles in speech data processingFinding entry-level speech data tasks

Speech Annotation and Speech Data Labeler roles both involve working with speech data, but Speech Annotation typically requires more detailed labeling, such as marking phonemes or intonations, while Speech Data Labeler focuses on basic transcription and tagging. Both roles are essential in training speech recognition systems and often share similar work environments and skills.

What is speech annotation?

Speech annotation is the process of labeling audio recordings of speech with relevant information, such as transcriptions, speaker identification, emotion, or linguistic features. This work is essential for training and improving speech recognition systems, natural language processing tools, and voice assistants. Annotators listen to audio clips and apply tags or notes according to specific guidelines, ensuring that machine learning models can accurately interpret spoken language. The quality and consistency of speech annotation directly impact the performance of AI systems that rely on understanding human speech.

What are the key skills and qualifications needed to thrive as a speech annotation specialist, and why are they important?

To excel as a Speech Annotation Specialist, you need strong linguistic knowledge, attention to detail, and familiarity with phonetics or language data, often supported by a degree in linguistics or a related field. Proficiency with annotation tools like ELAN, Praat, or custom software platforms is essential, along with an understanding of data management systems. Excellent analytical skills, patience, and clear communication help ensure accuracy and efficient teamwork. These skills are crucial for producing high-quality speech datasets, which are fundamental for training and improving speech recognition technologies.

What are popular job titles related to Speech Annotation jobs in California?

For Speech Annotation jobs in California, the most frequently searched job titles are:

What job categories do people searching Speech Annotation jobs in California look for?

The top searched job categories for Speech Annotation jobs in California are:

What cities in California are hiring for Speech Annotation jobs?

Cities in California with the most Speech Annotation job openings:

Speech Annotation jobs near you
Infographic showing various Speech Annotation job openings in California as of August 2026, with employment types broken down into 65% Full Time, 7% Part Time, 6% Temporary, and 22% Contract. Highlights an 70% In-person, 4% Hybrid, and 26% Remote job distribution.

Speech and Voice AI Analyst - Bilingual (Czech)

Welo Data

Sunnyvale, CA

$26 - $28/hr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 5 days ago

Job description

What if your language expertise could help improve the speech and voice AI systems used by millions of people worldwide?
WHAT YOU’LL DO
• Execute Data labelling and annotation tasks across speech and voice datasets.
• Work with audio and language data, including transcription, categorization, and tagging.
YOU ARE A FIT IF YOU’RE…
• A Czech speaker with strong written communication skills
• Experienced in data labelling, annotation, content review, or similar detail-oriented work (1+ year preferred)
• A Bachelor's degree holder
PROJECT DETAILS
• Location: 100% Onsite (Bay Area, Seattle, NYC, or client-dependent locations)
• Employment Type: W2 Full-Time Employee
• Hours: 40 hours per week
• Work Authorization: Must be authorized to work in the U.S. (no visa sponsorship available)
• Eligible Locations: NYC, Seattle, Bellevue, Redmond, San Francisco, Sunnyvale, Burlingame, Austin, Los Angeles, Washington DC, Chicago, and Boston
BENEFITS
• $26–$28 per hour
• Paid Vacation (6 days)
• Paid Company Holidays
• Paid Sick Leave
• Employee Assistance Program
• Health Savings Account (HSA)
• 401(k) Retirement Plan
• Additional Voluntary Benefits (Life, Accident, Critical Illness, etc.)
ADDITIONAL BENEFITS (Upon Eligibility)
• Medical, Dental, and Vision Insurance
• Free Breakfast, Lunch, and Dinner (where applicable)
• Stocked Micro-Kitchens with Snacks and Beverages
• Commuter Benefits, Including Shuttles and Bike-to-Work Options
• Unique Campus Amenities Depending on Location

Working at Welo Data

What to expect from working at Welo Data

From Welo Data

About Welo Data, in their own words

From Welo Data

Welo Data is a global AI data services company powering the next generation of AI. We build, annotate, and validate the training datasets that make AI models accurate, safe, and ready for the real world — across languages, cultures, and domains.

Our team of experts spans the globe, combining deep technical knowledge with a human-centered approach. If you want your work to shape how AI understands the world, you'll find your place here.

Diversity and inclusion statement

From Welo Data

Our Strength is derived from Winning Together. Welo Data is unequivocally committed to developing and fostering a workplace and organizational culture that values the diversity of thought and perspective delivered by a diverse global workforce operating within an inclusive organization.