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Senior Research Engineer

Lilt

Salary not specified
Aug 12, 2025
Indianapolis, IN, US
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LILT is looking for a Senior Research Engineer to design, develop, and productionize cutting-edge OCR and ASR systems leveraging open-source models to solve complex real-world challenges, including poor-quality audio and noisy, uncontrolled recording environments.

Requirements

  • Strong proficiency in Python and experience with popular OSS machine learning frameworks (e.g., PyTorch, TensorFlow).
  • Hands-on experience with ASR/OCR open-source toolkits (e.g., Kaldi, Vosk, Whisper, Tesseract).
  • Deep understanding of speech signal processing and noise-robust ASR techniques.
  • Familiarity with speaker diarization, source separation, and audio preprocessing methods.
  • Experience in deploying production-grade ML systems at scale.
  • Strong problem-solving skills and ability to work with ambiguous, noisy datasets.
  • Contributions to OSS speech/OCR projects.

Responsibilities

  • Design and implement production-grade prototypes for OCR and ASR systems based on open-source models.
  • Build ASR systems resilient to severe audio challenges such as low/high volume, distortions, overlapping speech, unknown speaker counts, and off-axis microphone placement.
  • Fine-tune and post-train ASR and OCR models for domain-specific accuracy improvements.
  • Develop robust OSS-based solutions for accurately identifying speakers in multi-speaker environments.
  • Create systems capable of detecting both speech and environmental noises (e.g., rattling keys, doors closing) within recordings.
  • Implement pipelines to isolate and export individual speaker audio into separate files.
  • Engineer accurate segmentation of speech into logical and temporal units for downstream processing.

Other

  • Authorization to work in the US and/or Germany is a precondition of employment.
  • This position can be based out of our Berlin, Germany office and will be expected to work in the office in a hybrid capacity.
  • Additional locations include the Washington D.C. metropolitan area where you will start as fully remote and then transition to hybrid once offices are opened in those locations.