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Dialpad Logo Dialpad · IT - Software Development

Ai Engineer, Voice Designer

Canada, Kitchener Employment contract 145000.00 - 172500.00 CAD / Year · Job Posted July 03, 2026
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Job Description

As an AI Engineer: Voice Designer, you’ll own the back-end implementation and linguistic optimization of the Text-to-Speech (TTS) layer for our next-generation AI voice agents. You’ll work squarely within our Speech Team—a high-impact R&D and engineering group focused on speech recognition, enhancement, and synthesis. You will bridge the gap between core speech science and product engineering, ensuring our voice agents sound human, context-aware, and trustworthy. You’ll also help create the systems that manage voice personas, tone, and conversational fillers, eventually exposing these as tweakable parameters to our customer-facing UI.

Job Responsibility

  • Own the back-end implementation and linguistic optimization of the Text-to-Speech (TTS) layer for our next-generation AI voice agents
  • Own the integration and optimization of multiple TTS vendor APIs while leading research and prototyping for open-source or in-house TTS architectures
  • Apply expertise in phonetics and sociolinguistics to ensure TTS input is formatted for maximum naturalness, including SSML orchestration and pronunciation handling
  • Craft context-specific utterances to optimize turn handling and build caller trust during agentic thought processes
  • Design and manage LLM and TTS prompts and parameters to define and refine agent personalities across different industry verticals
  • Architect the logic to expose voice attributes (speed, pitch, tone, style) to the product UI, allowing customers to customize their agent’s voice profile
  • Partner with ASR and Audio AI engineers to ensure end-to-end voice quality and minimize latency in the ASR to LLM to TTS pipeline

Requirements

  • Strong Python programming skills and experience with deep learning frameworks (e.g. PyTorch)
  • 3+ years of experience in Speech Synthesis (TTS) or Voice Design, including hands-on work with frameworks like NVIDIA NeMo, ESPnet, or Coqui, and hands-on experience with major TTS APIs such as ElevenLabs, Rime, and Cartesia
  • Degree in Computational Linguistics, Computer Science, or AI/ML with a deep understanding of phonetics, prosody, and syntax
  • Proven experience crafting and evaluating LLM prompts (system, few-shot) and managing structured prompt templates
  • Experience building production-grade APIs and integrating multi-vendor services in a cloud environment (GCP preferred)
  • Knowledge of speech quality metrics (MOS, intelligibility, latency) and the ability to design rigorous A/B tests for voice personas

What we offer

  • Competitive salary
  • comprehensive benefits
  • real opportunities for growth
  • cutting-edge AI tools
  • robust training program
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