Voice Expert

About the job

Cresta is on a mission to turn every customer conversation into a competitive advantage by unlocking the true potential of the contact center. Our platform combines the best of AI and human intelligence to help contact centers discover customer insights and behavioral best practices, automate conversations and inefficient processes, and empower every team member to work smarter and faster. Born from the prestigious Stanford AI lab, Cresta's co-founder and chairman is Sebastian Thrun, the genius behind Google X, Waymo, Udacity, and more. Our leadership also includes CEO, Ping Wu, the co-founder of Google Contact Center AI and Vertex AI platform, and co-founder, Tim Shi, an early member of Open AI.

We’ve assembled a world-class team of AI and ML experts, go-to-market leaders, and top-tier investors including Andreessen Horowitz, Greylock Partners, Sequoia, and former AT&T CEO John Donovan. Our valued customers include brands like Intuit, Cox Communications, Hilton, and Carmax and we’ve been recognized by Forbes and Bain Consulting as one of the top private AI companies in the world.

Join us on this thrilling journey to revolutionize the workforce with AI. The future of work is here, and it's at Cresta.

About The Role

As a Voice Expert, you will shape and deliver world-class voice experiences for Cresta’s AI Agents, defining what great sounds like in real end user interactions. Working directly with customer executives—often at Fortune 500 companies—you will articulate Cresta’s creative vision for voice and translate each customer’s brand, audience, and business goals into a distinctive, on-brand AI voice. Internally, you will partner closely with NLP Specialists, Conversation Designers, Product Managers, and GTM teams to evaluate voices at scale using both human judgment and AI, and establish best practices across industries and use cases. You will own the end-to-end creation of bespoke voices, leading voice actor sourcing, direction, recording, editing, engineering, and fine-tuning with TTS partners until the voice authentically represents the customer’s brand. Beyond the voice itself, you will help design natural, thoughtful conversational interactions to ensure every exchange feels intentional, engaging, and effective at driving business outcomes.

What You’ll Do

Define and champion the creative vision for the voice experience of Cresta’s AI Agents, establishing Cresta’s credibility and thought leadership in voice experience design.

Collaborate with Cresta customers (client facing role!) to co-create a "voice brand" specific to each customer’s unique business requirements/needs. Lead customer-facing workshops to translate brand voice requirements into specific voice selections or professionally cloned voices (PVC).

Produce the complete end-to-end PVC process with Text-to-Speech (TTS) vendors, including voice actor sourcing, coaching/directing, recording, audio editing/engineering, and voice fine-tuning.

Curate a diverse selection of voices to optimize for various industries and use cases and business categories.

Develop and document voice experience best practices tailored to verticals, personas, and brands.

Partner with Conversation Designers to design natural-sounding micro-interactions and define prompts for Large Language Models (LLMs) that optimize transcripts for TTS read-aloud quality.

Continuously refine the evaluation criteria for voice experience in collaboration with NLP specialists, and evaluate voices from various vendors.

What We’re Looking For

Voice Experience Mastery — The ability to define, evaluate, and craft what “great” sounds like. This includes prosody, pacing, emotional tone, turn-taking, and repair strategies that make AI conversations feel human and intentional—not mechanical. They know how to direct or tune voices until every moment feels natural, expressive, and brand-aligned.

Brand & Persona Design — Skill in translating a company’s identity and values into a consistent brand voice. They can codify tone, timbre, rhythm, and emotional nuance into style guides and voice recordings that make the AI sound distinct, trustworthy, and alive across every interaction.

Product & Creative Leadership — The vision and drive to connect user experience, technology, and brand goals into a cohesive roadmap. This person partners across design, product, and engineering, sets measurable quality bars, and ensures that improvements to voice experience actually move core business metrics and customer perception.

Bonus Points

Basic Fluency in Speech Technology & Evaluation — Solid working knowledge of ASR, TTS, and real-time interaction systems—enough to collaborate with engineers, read metrics like MOS, latency, and WER, and make informed tradeoffs.

Audio Editing – Working experience with audio editing (e.g., podcast, music, movie) and sound engineering.

Perks & Benefits

We offer a comprehensive and people-first benefits package to support you at work and in life:

Comprehensive medical, dental, and vision coverage with plans to fit you and your family

Flexible PTO to take the time you need, when you need it

Paid parental leave for all new parents welcoming a new child

Retirement savings plan to help you plan for the future

Remote work setup budget to help you create a productive home office

Monthly wellness and communication stipend to keep you connected and balanced

In-office meal program and commuter benefits provided for onsite employees