Senior Engineer — ASR / TTS / Speech LLM (Training + Eval + Integration)
Description
What You’ll Do
- Prepare and maintain synthetic and real training LLM model training: from model selection → fine-tuning → evaluation for clinical applications (RPM, Triage, inbound/outbound).
- Build scripts for data selection, augmentation (noise, codec, jitter), and corpus curation.
- Fine-tune models using CTC/RNN-T or adapter-based recipes on multi-GPU systems.
- Implement evaluation pipelines to measure WER, entity F1, and latency; automate MLflow logging.
- Experiment with bias-aware training and context list conditioning.
- Collaborate with backend and DevOps teams to integrate trained models into inference stacks.
- Support creation of context biasing APIs and LM rescoring paths.
- Assist in maintaining benchmarks versus commercial baselines (Deepgram, Whisper, etc.).
Desired Skills
- Strong programming in Python (PyTorch, Hugging Face, NeMo, ESPnet).
- Practical experience in audio data processing, augmentation, and ASR : SpecAugment , speed perturb, noise/RIRs, codec+PLC+jitter sims for PSTN/ ASR: Transducer/zipformer with chunked attention, frame-sync beam search, endpointing (VAD-EOU) biasing: WFST boosts + neural re-scoring; patient/name dictionaries; session-aware bias refresh.
- Familiarity with LoRA/adapters, distributed training, mixed precision.
- Proficiency with evaluation frameworks WER/sWER, Entity-F1, DER/JER, MOSNet/BVCC (TTS), PESQ/STOI (telephony), RTF/latency at P95/P99. and MLflow : Espnet, Speech brain, Nemo, Kaldi/K2, Livekit, Pipecat, Diffy
- Understanding of telephony speech characteristics, accents, and distortions.
- Collaborative mindset for cross-functional work with ML-ops and QA.
Qualifications
- / / M.S. in Computer Science, AI, or related field.
- 4–7 years in applied ML; ≥2 years focused on speech recognition or synthesis.
- Experience with model deployment workflows preferred.
Skills
As published by lever
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