Sigma is a leading global technology company specializing in data collection and annotation for Artificial Intelligence. Transcription
Content creation
Validation of audio, video, images, sentences, or words
All tasks are remote , performed through an online platform available 24/7.
This opportunity is offered for freelancers under a commercial contract.
Bachelor's degree in Linguistics, Languages, Literature, or a related field
Linguist with native or near-native proficiency in Mandarin Chinese
Fluent in English with the ability to accurately listen and write with excellent spelling and attention to detail
Solid command of linguistic theory, grammar, and language structure
Strong writing, editing, and communication skills
Experience in data annotation or content rating
Windows 10 or higher
macOS 13 Ventura or higher




Stable internet connection
Secure internet location, protected by a strong password
For audio-collection projects only:
Mobile phone with Android OS
Tablets and iOS devices are not supported

The purpose of the processing is to evaluate the tests submitted in the course of the selection process (for instance the transcribed content provided by the candidate). The legal basis for processing your data is the pre-contractual relationship between the parties and/or the provision of requested services.
Join us and be part of something general, innovative, and impactful. AI – Data done right.

📌 Mandarin Chinese Linguist Expert | Sigma AI (Madrid)
🏢 Sigma
📍 Madrid