Benjamin Reavill

Senior ASR Engineer (Speech Recognition / Voice AI)$200,000–250,000 equity benefitsRemote / San Francisco, CA (Hybrid)Full-time / PermanentDeepRec has partnered with a healthcare AI startup using conversational AI to reduce admin burden and improve patient experiences. Your work will sit at the centre of every interaction. When the speech system performs well, patients get faster support, clinicians receive better information, and healthcare teams spend less time on manual tasks.This role is for someone who enjoys solving real-world speech problems, not just improving benchmark scores.The OpportunityYou'll own ASR quality across live patient conversations. From noisy phone lines to accented speech and complex healthcare terminology, you'll identify failure patterns, build evaluation systems, and improve transcription performance where it matters most: production.You'll work across ASR, telephony, LLM workflows, and product teams to make every conversation more accurate and reliable.What You'll Do- Own ASR evaluation across live and recorded calls- Diagnose transcription failures and identify root causes- Build benchmarking frameworks and error analysis workflows- Improve recognition of healthcare language and terminology- Compare and evaluate ASR models and vendors- Create dashboards for quality monitoring and performance tracking- Partner with engineering and product teams on improvementsWhat You'll BringEssential- Strong experience with speech recognition or voice AI systems- Deep understanding of ASR evaluation and error analysis- Strong Python skills for ML and audio workflows- Experience diagnosing production AI system failuresDesirable- Experience adapting or fine-tuning ASR models- Background in healthcare, telephony, or regulated environments- Experience with real-time conversational AI systems*We encourage you to apply even if you don't meet every requirement. The right mindset matters as much as the right CV.*What's In It For You- Remote-first role across the US and Europe- Ownership of a business-critical AI capability- Work across ASR, telephony, LLMs, and healthcare AI- Healthcare, dental, vision, 401(k), and flexible paid time off- Opportunity to shape how conversational AI performs in production

Machine Learning Engineer, SpeechLLM Evaluations $250,000 - $350,000 bonus equity San Francisco, CA. Hybrid (3 days onsite)Full-time / PermanentDeepRec has partnered with a high-growth AI company building speech intelligence products used by more than 1.5 million people worldwide. This is a chance to define how their foundational Speech LLMs are measured, improved, and trusted. If you've ever felt model evaluation deserves the same attention as model training, you'll have the space to prove it here.The OpportunityYou'll join an early Speech LLM team where your work shapes research decisions, product quality, and model releases. You'll own the systems that answer one of the hardest questions in AI: how do you measure something as human as conversation, expression, and understanding?What You'll Do- Build evaluation frameworks for speech and conversational AI models- Define benchmarks for transcription, audio quality, and dialogue performance- Create automated evaluation pipelines for training checkpoints- Own dashboards that surface model health and regressions- Partner with researchers to translate capabilities into measurable outcomes- Investigate unexpected performance changes during model training- Improve evaluation speed, quality, and reliability across the research lifecycleWhat You'll BringEssential- Strong Python engineering experience in production environments- Experience building ML evaluation, data, or experimentation systems- Deep understanding of statistics, benchmarking, and model performance analysis- Ability to explain technical findings to varied audiencesDesirable- Experience with speech metrics such as WER, CER, PESQ, or MOS- Familiarity with LLM-as-a-Judge evaluation methods- Experience with ML observability tools such as Weights & Biases or MLflow*We encourage you to apply even if you don't meet every requirement. The right mindset matters as much as the right CV.*What's In It For You- Foundational role within a growing Speech LLM research team- Ownership of evaluation strategy and technical direction- Work on problems spanning ML, statistics, software, and research- Comprehensive healthcare, 401(k) matching, parental leave, and unlimited PTO- Conference, learning, and career development support- Direct influence on products used by a global customer base