Project Perseus | Speech & Voice AI Analyst

About the role

Project Perseus defines a critical function within Welo Global where meticulous human insight directly shapes the performance of advanced machine learning systems. In this capacity, you will own the end to end integrity of speech and voice data as it moves from raw audio into structured, high value training material. Your daily work will involve executing high volume data labeling and annotation tasks across diverse speech and voice datasets, ensuring that every transcript and tag reflects precise linguistic reality. You will follow detailed guidelines to ensure consistency, accuracy, and data integrity at scale, becoming the definitive quality checkpoint for downstream model training. On the team you would Maintain strong throughput while meeting quality expectations, balancing speed with an uncompromising attention to linguistic detail. You will Escalate unclear or ambiguous cases appropriately, acting as the first line of defense against data drift and annotation drift. Adapt to evolving guidelines and workflows as systems and requirements change, demonstrating flexibility without sacrificing rigor. You will Support baseline data production needs for AI training pipelines, enabling the continuous development of more robust and reliable voice technologies.

Key facts

Location: California

Engagement: Full-time

You need Pay Rate: $26 - $28/hour.

Please note that in order to verify work authorization as is required by Federal law (I-9 process), all new employees must complete a live video verification with their selected IDs and provide photos of these selected IDs within their first 3 days of employment.

What you'll do

• Execute high-volume data labeling and annotation tasks across speech and voice datasets, transforming raw audio into actionable linguistic assets.
• Follow detailed guidelines to ensure consistency, accuracy, and data integrity at scale, embedding quality into every step of the production workflow.
• Work with audio and language data, including transcription, categorization, and tagging, to capture nuance, context, and speaker intent.
• You will Maintain strong throughput while meeting quality expectations, optimizing your processes to deliver reliable output without compromising accuracy.
• You will Escalate unclear or ambiguous cases appropriately, documenting edge conditions and anomalies for review by senior analysts and engineers.
• Adapt to evolving guidelines and workflows as systems and requirements change, demonstrating agility and a commitment to continuous learning in rapidly shifting project parameters.
• You will Support baseline data production needs for AI training pipelines, providing the foundational datasets that allow models to learn and generalize effectively.
• You will Contribute to team calibrations and quality alignment sessions, sharing observations and insights that refine annotation standards and improve inter annotator agreement.
• You will Use go and rust as core tooling elements in your daily work, leveraging these languages to build scripts, automate checks, and interact with data pipelines.
• You will Partner with engineering and product teams to clarify requirements, surface data patterns, and ensure that the labeled output directly supports model development goals.

Requirements

• Work Authorization: Must be authorized to work in the U.S. (no visa sponsorship), ensuring compliance with federal employment regulations from day one.
• You need Native-level fluency in Simplified Chinese, allowing you to accurately interpret and reproduce linguistic subtleties across speech and text data.
• 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, providing a baseline of relevant domain knowledge.
• You will Strong written communication skills and language fundamentals, essential for producing clean transcripts, precise tags, and consistent metadata.
• You will High attention to detail and ability to maintain accuracy in repetitive tasks, catching subtle variations that could otherwise degrade model performance.
• You will Comfort working in structured, process-driven environments, adhering to established protocols and quality standards that govern large scale annotation efforts.
• You will Ability to follow detailed instructions and apply guidelines consistently, ensuring that every dataset reflects the same rigorous methodology.
• You will Ability to manage time effectively and maintain steady output, meeting daily and weekly targets without sacrificing the integrity of your work.
• You need To know more details (Click here), reviewing supplementary documentation on procedures, tools, and expectations before onboarding.

Practical notes

Note: 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.

For Project Perseus | Speech & Voice AI Analyst at Welo Global, Maintain strong throughput while meeting quality expectations.

For Project Perseus | Speech & Voice AI Analyst at Welo Global, Escalate unclear or ambiguous cases appropriately.

Adapt to evolving guidelines and workflows as systems and requirements change.

For Project Perseus | Speech & Voice AI Analyst at Welo Global, Support baseline data production needs for AI training pipelines.

For Project Perseus | Speech & Voice AI Analyst at Welo Global, Contribute to team calibrations and quality alignment sessions.

For Project Perseus | Speech & Voice AI Analyst at Welo Global, What We're Looking For.

For Project Perseus | Speech & Voice AI Analyst at Welo Global, Native-level fluency in Simplified Chinese.

For Project Perseus | Speech & Voice AI Analyst at Welo Global, Strong written communication skills and language fundamentals.

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.

Note: 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.

For Project Perseus | Speech & Voice AI Analyst at Welo Global, Maintain strong throughput while meeting quality expectations.

For Project Perseus | Speech & Voice AI Analyst at Welo Global, Escalate unclear or ambiguous cases appropriately.

Adapt to evolving guidelines and workflows as systems and requirements change.

For Project Perseus | Speech & Voice AI Analyst at Welo Global, Support baseline data production needs for AI training pipelines.

For Project Perseus | Speech & Voice AI Analyst at Welo Global, Contribute to team calibrations and quality alignment sessions.

For Project Perseus | Speech & Voice AI Analyst at Welo Global, What We're Looking For.

For Project Perseus | Speech & Voice AI Analyst at Welo Global, Native-level fluency in Simplified Chinese.

For Project Perseus | Speech & Voice AI Analyst at Welo Global, Strong written communication skills and language fundamentals.

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.