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MWDN

Machine Learning Engineer – Voice AI, Generative Music

MWDN

. Fine-tune and improve a singing-voice conversion and cloning model .

Posted 9/15/2026part-timeRemote • United StatesMid-LevelSeniorWebsite

Core Competencies

Role fit
Core Competencies

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Demonstrates expertise in training and deploying deep learning models, particularly in audio and NLP, with a strong focus on voice cloning and singing voice conversion. Proficient in model evaluation and integration of multilingual text-to-speech solutions, ensuring high-quality output and user experience.

Highest-signal resume keywords
Deep Learning Model TrainingVoice CloningText-to-Speech Fine-TuningProficiency in PyTorchNative Spanish Proficiency

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
Voice CloningSinging Voice ConversionText-to-Speech Model Fine-TuningLLM Fine-TuningModel EvaluationEvidence-Based TestingData ExpansionAPI IntegrationLyrics GenerationContainerization
Soft Skills
Rigorous EvaluationQuality Assessment
Tools & Technologies
PyTorchRunPodAWSDockerServerless InferenceChatterbox Multilingual LoRAACE StudioACE-StepRVCSo-vits-svc
Industry Keywords
Audio ProcessingNLPMusic ProductionMIDIDAWsVoice AIConsent-Based Voice AI

Tech Stack

Tools & technologies
AWSCloudDockerPyTorch

About the role

Key responsibilities & impact
  • Fine-tune and improve a singing-voice conversion and cloning model
  • Increase vocal fidelity from a 70–75% baseline to at least 90% in blind listening tests
  • Reproduce expressive vocal characteristics including vibrato, falsetto, dynamics, spoken delivery, and sung delivery
  • Evaluate training dataset expansion, alternative base models, and enterprise APIs
  • Own and improve a validated Chatterbox Multilingual LoRA fine-tune for a Spanish-speaking voice
  • Ensure accurate Mexican-accent reproduction and pronunciation of J, Ñ, and X
  • Containerize the text-to-speech model and deploy it as a serverless inference endpoint using RunPod or similar
  • Integrate the inference endpoint with the existing web platform through an API
  • Train a second version using clean studio recordings to improve output stability
  • Develop a proprietary Spanish-language lyrics-generation model
  • Use an open-weight LLM, LoRA fine-tuning, DPO preference optimization, and RAG over a curated content corpus
  • Establish evaluation criteria and organize quality assessment with native Spanish speakers
  • Integrate the completed lyrics model into the existing frontend

Requirements

What you’ll need
  • 3+ years of experience training and deploying deep learning models in production, preferably within audio or NLP
  • Hands-on experience in at least two of: voice cloning or Singing Voice Conversion (SVC); Text-to-Speech model fine-tuning; LLM fine-tuning using LoRA, DPO, and RAG
  • Strong proficiency in PyTorch
  • Practical experience with GPU cloud infrastructure such as RunPod or AWS
  • Experience with Docker and serverless inference
  • Rigorous, evidence-based model evaluation, including benchmarks, ablation studies, and blind testing
  • Native or strong professional proficiency in Spanish, required for lyrics evaluation and voice quality assurance
  • Music background or experience with music-production tools and workflows, including stems, MIDI, and DAWs (nice to have)
  • Experience with singing-voice synthesis solutions such as ACE Studio, ACE-Step, RVC, so-vits-svc, or similar technologies (nice to have)
  • Experience working with licensed celebrity or artist voices and consent-based voice AI (nice to have)

Benefits

Comp & perks
  • Security through client vetting to minimize risks and ensure reliability and timely payments
  • Career support and assistance finding new opportunities
  • Legal assistance with independent contractor or sole proprietorship status, taxes, and related processes
  • English courses
  • Professional growth opportunities
  • Team-building events
  • Flexible working hours
  • 29 days of PTO (18 working days per year plus all national holidays)
  • 10 paid recovery days
  • Full financial and legal support for independent contractors
  • Free English classes with native speakers or Ukrainian teachers
  • Dedicated HR support