Agent Experience Designer, Voice (Multilingual)
San Francisco, CA • FullTime
Posted 7mo ago
About the job
Sierra is building a platform to enable companies to create more human customer experiences with AI. We are seeking an Agent Experience Designer, Voice (Multilingual) to shape and scale high-quality voice experiences across a global portfolio of AI agents. This role involves working closely with cross-functional teams and customer stakeholders to improve voice quality, accelerate multilingual readiness, and create more human-like interactions. You will be responsible for evaluating and iterating on voices across multiple providers and languages, supporting timely multilingual launches, and designing repeatable evaluation methods for voice performance. Additionally, you will partner with engineering and product teams to resolve voice issues, contribute to customer-facing voice design, and enable teams to scale voice design effectively. The role also includes co-creating agent personas and interaction patterns, and capturing/sharing learnings to improve consistency and quality across deployments.
Responsibilities
- Improve voice quality by evaluating, comparing, and iterating on voices across providers, languages, and use cases.
- Support faster multilingual readiness and launches by partnering with product, engineering, and deployment teams.
- Design and apply effective and repeatable evaluation methods for voice performance and interaction quality.
- Partner cross-functionally to resolve voice and interaction issues by investigating quality gaps and diagnosing root causes.
- Contribute to customer-facing voice design work, advising on options, tradeoffs, and best practices.
- Enable teams to scale voice design effectively by developing guidance, examples, and product enhancements.
- Co-create agent personas and interaction patterns with internal teams and customers.
- Capture and share learnings, patterns, and regional considerations to improve consistency and quality.
Requirements
- 5+ years in a role blending product craft with applied systems thinking (e.g., voice/AI experience design, conversation design, applied linguistics, UX for AI, product engineering with strong user experience focus, localization program leadership with quality ownership).
- Strong ability to operate across many languages and priorities, bringing structure to ambiguity and shipping reliably with high quality.
- Experience creating repeatable evaluation frameworks (rubrics, test suites, scorecards, QA gates) and using them to drive decisions.
- Excellent communication skills, able to translate complex signals into clear guidance for stakeholders.
- Deep knowledge of the product, customers, and their customers, with a focus on listening and improving the system and product.