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Senior Data Scientist (NYC)

BoldVoice· Engineering, Data science
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Hybrid (New York, NY)$140k - $220k + equityFull-timePosted 2mo ago

About the role

Senior Data Scientist at BoldVoice, an AI-powered speech coaching app for non-native English speakers, responsible for end-to-end experimentation, metric design, and turning data into product decisions that shape the roadmap.

Responsibilities

  • Own experimentation end to end: design A/B tests, choose metrics, run analysis with proper statistical rigor, and decide what ships
  • Build and own the metric layer the whole company runs on: activation, trial start, trial to paid conversion, retention curves, LTV, and learning outcomes
  • Run deep dives that inform the roadmap: analyze retention by native language, identify which lessons move pronunciation scores, differentiate users who churn early
  • Turn behavioral and speech-scoring data into models for product use: churn/conversion propensity, lesson recommendation, and personalization of learning path
  • Partner with growth on paid acquisition measurement: CAC by channel and creative, payback, incrementality, and where to allocate budget
  • Work with the ML team to measure model quality in the wild, including cross-accent performance and whether model changes improve outcomes
  • Make data self-serve so PMs, designers, or engineers can answer their own questions

Qualifications

  • At least 5 years in data science or product analytics, ideally at a consumer subscription app or fast-moving startup
  • Deep experimentation experience: power analysis, CUPED, multiple comparisons, and handling situations where clean A/B tests aren’t possible
  • Strong SQL and Python (pandas, scikit-learn, statsmodels or equivalent); experience with production databases
  • Fluency with the consumer subscription funnel: install to trial to paid, cohort retention, LTV, and paid acquisition measurement
  • Experience with product analytics and experimentation tooling (Mixpanel and GrowthBook on top of PostgreSQL)
  • Up to date with LLM tools (e.g., Claude Code, Cursor, Codex) for rapid prototyping and shipping code
  • Willing to work in-person in NYC office at least 3x per week
  • Nice to have: causal inference beyond A/B testing, exposure to speech or audio ML evaluation, or measuring learning outcomes in education products

Skills

Required:Experimentation design and analysisSQLPython (pandas, scikit-learn, statsmodels)Product analytics tooling (Mixpanel, GrowthBook)Measurement of subscription funnel metrics

Benefits

  • salary and generous stock options
  • fully paid health/vision/dental insurance
  • 401K program
  • in-person team in downtown Manhattan with relocation assistance if needed
  • A+ team with immediate impact
  • access to exclusive startup events, conferences and networks
Last updated Oct 14, 2026. Interested? Apply on the company site.
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About BoldVoice

Speech and accent coaching app for non-native English speakers

BoldVoice helps non-native English speakers to speak clearly and confidently. We combine bite-sized video lessons from Hollywood accent coaches with instant pronunciation feedback from AI, to create an effective and engaging learning experience.

educationspeech-recognition
Company profileWebsite

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