Project Perseus | Speech & Voice AI Analyst - Czech Speakers

Welo Data is seeking detail-oriented individuals to support speech and voice AI systems through high-quality data production. The Data Labeling Analyst will execute speech and language data annotation workflows, maintain accuracy and throughput, escalate ambiguous cases, and support AI training pipelines and quality alignment activities.

What you'll do:

• Execute high-volume data labeling and annotation tasks across speech and voice datasets
• Follow detailed guidelines to ensure consistency, accuracy, and data integrity at scale
• Work with audio and language data, including transcription, categorization, and tagging
• Maintain strong throughput while meeting quality expectations
• Escalate unclear or ambiguous cases appropriately
• Adapt to evolving guidelines and workflows as systems and requirements change
• Support baseline data production needs for AI training pipelines
• Contribute to team calibrations and quality alignment sessions

What they're looking for:

• **Native-level fluency in Czech**
• Strong written communication skills and language fundamentals
• **1 year of work experience** in data labeling, annotation, or content-focused work; **or a Bachelor's degree or equivalent** academic qualification in a related field
• Ability to follow detailed instructions and apply guidelines consistently
• High attention to detail and ability to maintain accuracy in repetitive tasks
• Comfort working in structured, process-driven environments
• Ability to manage time effectively and maintain steady output
• Willingness to ask questions and escalate when needed
• **Work Authorization:** Must be authorized to work in the U.S. (no visa sponsorship)
• Please note that this is a 100% onsite position—remote work is not available for this role. To be considered, candidates must be located in or able to commute to one of the following cities: NYC, Seattle, Bellevue, Redmond, San Francisco, Sunnyvale, Burlingame, Austin, Los Angeles, Washington DC, Chicago, Boston. Please only apply if you meet this location requirement
• Basic familiarity with AI, speech technology, or language data is a plus

Benefits:

• Paid Vacation: 6 days
• Paid Company Holidays: 2 days (Memorial Day and Labor Day)
• Paid Sick Leave: accrued per applicable state law and company policy
• Medical, Dental, and Vision Insurance (eligibility applies)
• Health Savings Account (HSA)
• 401(k) Retirement Plan
• Employee Assistance Program
• Additional voluntary benefits (life, accident, critical illness, etc.)
• Onsite Perks (where applicable): Free breakfast, lunch, and dinner
• Stocked micro-kitchens with snacks and beverages