Agent Experience Designer, Voice (multilingual)

Sierra Sierra · AI Frontier · London, United Kingdom · Product Design

The Agent Experience Designer, Voice (Multilingual) role focuses on driving multilingual voice experience launches for EMEA customers, ensuring high quality and faster shipping of AI-powered customer experiences. This involves owning voice readiness, evaluating and recommending voice providers and models, conducting design sessions, creating regional best practices, and resolving voice issues in partnership with engineering teams.

What you'd actually do

  1. Drive multilingual launches in EMEA: Own voice readiness across a portfolio of EMEA customers and languages, coordinating language launches, quality checks, and ongoing iteration.
  2. Run voice selection and improvement loops: Evaluate providers and voices for regional needs, recommend providers, models and voices, and push improvements with engineering and vendors.
  3. Conduct scalable voice design and selection sessions: Run high-touch sessions for strategic customers, with a focus on enablement, not ownership.
  4. Create regional best practices: Capture and document EMEA-specific voice guidance (text normalization, language and accent families, cultural norms, regional customer experience expectations).
  5. Set the bar for great EMEA voice: Partner with Voice Engineering and deployment teams to triage and resolve voice issues quickly, with clear artifacts and a bias to ship quickly while improving systems.

Skills

Required

  • 3+ years experience in experience or conversation design in a hands-on product craft role.
  • Strong regional and multilingual instincts; high taste and high rigor for language, including: English (UK/International), French, German, Spanish, Italian, Portuguese, Arabic, Dutch and Nordic languages.
  • Ability to handle multiple customer contexts simultaneously while staying organized.
  • Confidence working directly with customer stakeholders in co-creation settings.

Nice to have

  • Experience with speech synthesis and conversational agents.
  • Deep expertise with EMEA language families.
  • Familiarity with provider and voice evaluation.
  • Linguistics, sound editing, and/or musical background.
  • Experience enabling other teams via playbooks, training, and internal tooling.

What the JD emphasized

  • multilingual
  • voice readiness
  • quality
  • regional
  • EMEA

Other signals

  • customer deployments
  • multilingual voice experiences
  • voice quality
  • regional best practices