
501 - 1000 employees
Founded 2008
💼 Consulting
🏥 Healthcare
📦 Logistics
Consulting • Healthcare • Logistics
Sigma AI is a global company that collects, prepares, and labels high-quality training data and delivers custom, data-centric AI solutions to help organizations build ethical, human-centered machine learning systems. Through its Sigma Cognition arm it offers bespoke AI services, and its workforce of annotators and specialists supports speech, text, image, and video data annotation at scale. The company emphasizes integrity, inclusivity, and sustainability while helping clients reduce bias and scale AI responsibly.
🔥 2 minutes ago
🌐 Czechia, Slovakia, +2 more countries – Remote
⏳ Contract/Temporary
🟡 Mid-level
🟠 Senior
🤖 Artificial Intelligence
👻 Ghost score 10%
🗣️🇨🇿 Czech Required
Where this job comes from
Posted on Sigma AI's careers page, not through a job board
First seen by Remote Rocketship 2 minutes ago

501 - 1000 employees
Founded 2008
💼 Consulting
🏥 Healthcare
📦 Logistics
Consulting • Healthcare • Logistics
Sigma AI is a global company that collects, prepares, and labels high-quality training data and delivers custom, data-centric AI solutions to help organizations build ethical, human-centered machine learning systems. Through its Sigma Cognition arm it offers bespoke AI services, and its workforce of annotators and specialists supports speech, text, image, and video data annotation at scale. The company emphasizes integrity, inclusivity, and sustainability while helping clients reduce bias and scale AI responsibly.
• Perform linguistic-project tasks including categorization, annotation, correction, transcription, evaluation, conversational interactions, voice recording, content creation, localization, and validation • Validate audio, video, images, sentences, or words • Complete tasks remotely through an online platform available 24/7 • Submit required tests to assess qualifications during the selection process
• Fluent in Czech; able to listen and write correctly without spelling mistakes • Fluent in English; able to listen and write correctly without spelling mistakes • Computer literacy • Experience with computational linguistics, corpus analysis, language data annotation, or LLM training (preferred but not mandatory) • Strong attention to detail • Computer with minimum 4GB RAM • Microphone and webcam • Windows 10 or higher, or macOS 13 Ventura or higher • All OS updates installed and supported by the vendor • Stable internet connection • Headphones • 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 • Mandatory qualification tests after application submission
• All tasks are remote, performed through an online platform available 24/7 • Freelance opportunity under a commercial contract
Apply NowImprove your chances of getting an interview by checking your resume score before you apply.
🕒 3 days ago
Czech language specialist evaluating Czech language performance in AI models for Meridial. Documenting errors and improving prompts and evaluation metrics.
🇨🇿 Czechia – Remote
💵 $8 - $65 / hour
💰 $100M Series unknown on 2025-10
⏳ Contract/Temporary
🟡 Mid-level
🟠 Senior
🤖 Artificial Intelligence
🗣️🇨🇿 Czech Required
🕒 July 27
AI Analyst specializing in the evaluation and annotation of AI-generated content. Working remotely from Czech Republic on multilingual AI projects.
🗣️🇨🇿 Czech Required
🕒 March 20
Voice Actor for AI training on Czech language data involving recording and analyzing speech samples. Collaborating with AI tools to assess outputs and refine voice models.
🇨🇿 Czechia – Remote
💵 $6 - $65 / hour
🔥 Funding within the last year
💰 $100M Series unknown on 2025-10
⏳ Contract/Temporary
🟡 Mid-level
🟠 Senior
🤖 Artificial Intelligence
🗣️🇨🇿 Czech Required