Senior Research Engineer, Audio and Speech

Job summary

Responsibilities

As a Research Engineer focused on Audio and Speech, you’ll be responsible for building the models and agent harnesses that power Decagon’s real-time voice agents and taking them all the way from idea to production.

• Design and build next-generation agent harnesses optimized for streaming speech, turn-taking, interruptions, overlapping speech, and continuous interaction
• Research and train multimodal and full-duplex models that jointly understand audio, reason, and generate speech
• Improve speech recognition, voice activity detection, endpointing, and speech generation across diverse speakers, environments, domains, and languages
• Build evaluations and use production calls to ship measurable improvements in accuracy, latency, naturalness, and task outcomes
• Optimize end-to-end inference for responsiveness, throughput, stability, and cost, partnering with Voice Platform and Infrastructure teams to deploy at scale

What they're looking for

• 4+ years of experience in speech, audio ML, multimodal ML, or production machine learning
• Experience developing or adapting autoregressive, diffusion, flow-matching, or codec-based speech models
• Hands-on experience with streaming agent systems, low-latency inference, production model serving, and evaluation on real-world audio
• Fluency in Python and a modern deep-learning framework such as PyTorch, with strong foundations in machine learning and signal processing
• A track record of taking research ideas from prototype to reliable, measurable production impact

Tech stack

• Python
• PyTorch