Ling Cheng
Director of AI at Quizlet
United States
Overview
Work Experience
AI/ML Advisor
2025 - Current
Working with former Glassdoor executives & founding team to bring transparency and community to physicians and APPs. Starting with pay transparency, we've built one of the largest and fastest-growing compensation datasets in medicine in just a few months, with over 12,000 members.
Director of AI / ML - Generative AI Lead
2022 - 2024
Quizlet is a top consumer learning platform with 50M+ monthly active users during my tenure. I first grew and led the ML team, building 30+ ML models, improving the suite of study tools, and contributing to 8x growth in subscriptions revenue during my time there. Later I led new AI products and innovation. Spearheaded the first generative AI-powered ed tech products at scale in early 2023 (just 3 months after the ChatGPT release): - Initiated Notes-to-Set, turning student notes into quiz-read material, now evolved to power 40% of set creation - Led the launch and creation of Q-Chat, the first AI tutor grounded on students’ study material, with 10M+ conversations. Led the partnership with OpenAI as a ChatGPT API launch partner. - Drove cross-functional AI innovation team: shipped 4 new AI features to production A/B tests in 6 months, including Essay Starter and Brain Beats. - Partnered closely with Legal and Trust & Safety to develop extra internal guardrails. For my leadership, I was recognized in the Business Insider Top 100 in AI and Top 6 in AI for Edtech from Quizlet's recommendation
Director of AI / ML - Head of ML
2020 - 2022
- Directed ML strategy across Quizlet, which helped drive deeper learning for students, and 8x growth in subscriptions revenue. - Delivered key innovations at the intersection of learning science & ML, including adaptive questions, custom MCQs, semantic text grading (1st in market), and content recommendations. - Scaled team from 2 to 12, with the highest retaining team (5 hired now at 4+ years) and top management scores. Grew reports up to manager and principal levels. - Advised on all stages of ML, including training data, model design, product, engineering implementation, and evaluations. - Guided ML infrastructure decisions, and helped form the ML Platform team. - Conducted 15+ well-attended ML workshops over the years, including to executive leadership. - Launch partner for OpenAI’s GPT-3 (2020), which involved exploration of educational use cases.
Sr Manager, Data Science / Machine Learning
2018 - 2020
Quizlet is a learning platform that uses activities and games to help students practice and master what they’re learning.
Raised $62,000,000.00 from General Atlantic.
Sr Manager, Data Science / Machine Learning
2017 - 2018
Managed ML for core experiences, including job search ranking, personalization, salary estimates, and email, with measured wins in all areas.
Lead Data Scientist
2015 - 2017
Senior Data Scientist
2014 - 2015
- Developed Glassdoor’s first production ML model: automated content moderation, which cut manual review workload by over 50%. - Created Glassdoor’s first job title classifier, used across all departments for taxonomy alignment. - Represented Glassdoor at the White House on narrowing the U.S. skills gap.
Glassdoor is a job and recruiting sites that operates online jobs and career community.
Raised $204,500,000.00 from Employee Stock Option Fund and EquityZen.
Data Science Consultant
2013 - 2014
Sama is a training data partner trusted by organizations to develop accurate artificial intelligence and machine learning models.
Raised $84,800,000.00 from Vistara Growth, Caisse de Depot et Placement du Quebec, Salesforce Ventures and First Ascent Ventures.
Data Scientist / Co-Founder
2013 - 2013
- Developed site to collect and display sustainability practices of businesses - Won second place at the Business for Social Responsibility Hackathon - At the time, I was one of two full-time co-founders, and left before the start-up was funded
Sr Business Analyst/Data Scientist
2010 - 2013
Introduced and built analytics tools for the job search site.