Audio Transcription and Diarization QA Specialist

About OpenTrain

OpenTrain AI is the hiring and contracting organization for this role. OpenTrain is the #1 platform for finding and building careers in AI training and data labeling, helping contributors discover projects, build credible profiles, and grow their experience in a fast-moving field.

About AI Training and Audio Data Work

AI training is the human work behind modern artificial intelligence. Contributors transcribe and review audio, evaluate model outputs, and prepare high-quality examples that help AI systems understand speech, conversation, and context.

This work is remote and flexible, making it possible to contribute from anywhere with an internet connection while working on cutting-edge AI systems.

The Role

OpenTrain AI is seeking an Audio Transcription and Diarization QA Specialist to perform final quality reviews of multi-channel recordings and human-verified annotations. You will support the evaluation of multilingual, multi-speaker AI systems by checking audio fidelity, transcription accuracy, speaker diarization, timestamps, metadata, and content safety.

The recordings feature realistic, unscripted group conversations, including overlaps, interruptions, false starts, fillers, backchannels, and other natural speech patterns that evaluation-grade datasets must preserve.

• Role type: Part-time contractor
• Experience level: Entry level
• Time requirement: 20+ hours per week
• Language requirement: Native US English proficiency
• Location: Worldwide and remote

What You'll Do

You will assess both the technical quality of recordings and the accuracy of their associated annotations. Your reviews should apply rigorous quality, privacy, safety, and annotation standards while preserving spontaneous speech exactly as spoken.

• Evaluate channel isolation, audio bleed, background noise, clipping, low gain, and other audio-fidelity issues.
• Review human-validated transcriptions against strict accuracy and low word-error-rate targets.
• Validate turn-level and word-level timestamps.
• Check speaker identification, JSON-formatted metadata, demographic markers, contextual domains, and conversational tags.
• Confirm that spontaneous speech is captured verbatim without smoothing or prescriptive grammar corrections.
• Audit sessions for personally identifying information, toxic material, and sensitive content.
• Assign pass/fail or agree/disagree outcomes based on annotation quality.
• Provide clear, actionable feedback when work requires correction.

Required Skills

This role requires precise comprehension of complex, spontaneous, multi-speaker conversations and strong judgment when applying detailed review standards.

• Native proficiency in US English.
• A highly developed ear for channel bleed, clipping, low gain, disruptive background noise, and other subtle audio problems.
• Experience applying verbatim transcription conventions to overlaps, interruptions, false starts, fillers, and backchannels.
• Ability to validate speaker diarization, word-level and turn-level timestamps, and JSON metadata logic.
• Strong judgment when identifying PII, toxic content, sensitive content, and annotation-quality issues.

Helpful Background

Experience in linguistics or phonetics can help you recognize natural, unnormalized speech and conversational dynamics. Language teaching experience may support careful attention to language detail and verbatim conventions.

Professional transcription experience may provide useful audio-fidelity judgment, rigorous timestamping habits, and familiarity with demanding accuracy targets.

Why Work With OpenTrain

AI training and data-labeling work gives contributors a direct role in shaping how advanced AI systems understand and respond to the world. OpenTrain helps you build a focused record of experience and find opportunities that match your skills as you grow.

• Work remotely from anywhere.
• Choose flexible part-time work that can fit around other commitments.
• Build experience in audio transcription, speech data quality, and AI evaluation.
• Create a stronger professional profile in a rapidly growing technology field.

How to Apply

Create a free OpenTrain account, build your profile around your transcription, audio-review, and language skills, and apply for this contractor opportunity. Your experience with spontaneous speech, diarization, timestamps, metadata, and quality review will help demonstrate your fit.