David (Cheng) D.

Policy Specialist & Analyst

Berlin, Germany

Experience

May 2023 - Present
2 years 7 months

Policy Specialist & Analyst

Tiktok GmbH / Bytedance Ltd.

  • Moderation Strategy and Process Improvement: Evaluated pain-points of moderation process & strategy. Conducted lean moderation process and integration of policy issues to improve core metrics KPI, moderation accuracy and consistency
  • Operational Excellence: Cross-functional collaboration to maintain the safety of the platform’s ecosystem by handling impactful escalations, including agile mechanisms to prevent harmful content like hate speech, fake news misinformation on events such as German Election 2025, Olympic Games Paris 2024, harmful AIGC
  • Applied AI & LLM on moderation process and policy development: Collaborated with product and data science teams on improving the efficiency and accuracy of AI moderation processes, including RLHF with high-quality data labeling, prompt engineering, model refinement by translating policy wording into decision trees, Python coding to automate the process. Created SOP and metrics for model iteration and result tracking
Nov 2021 - May 2023
1 year 7 months

DACH Market Specialist

Tiktok GmbH / Bytedance Ltd.

  • Quality Management: Partnered with cross-functional teams to conduct in-depth analysis of core quality metrics (FNP/FPR, accuracy, F1 score), leading initiatives that resulted in measurable enhancements, including lean moderation processes to be more agile and controllable
  • Data Visualization & Data Analysis: Developed customized dashboards and datasets by applying SQL, transforming raw metrics into clear visualizations and actionable insights for quality monitoring
  • Escalation Management: Oversaw the end-to-end escalation process for critical content safety issues and facilitated the company-wide rollout of new moderation policies
Nov 2020 - Oct 2021
1 year

Quality Analyst

Tiktok GmbH / Bytedance Ltd.

  • Content Safety Management: Reviewed and improved content moderation quality to avoid false overkill and violation leakage
  • Data Analysis & Improvement of Core Metrics: Defined measurable key quality metrics including moderation accuracy (DMAIC method) and improved the metrics significantly by applying root-cause analysis
  • Applied SQL and advanced spreadsheet skills: Developed tools to extract impactful insights from raw data, detect anomalies, and calculate moderator performance
Nov 2019 - Jun 2020
8 months

Internship and Thesis

Fraport AG

  • Process improvement: Analyzed and improved airport operation by reducing and optimizing turnaround time (TAT) of aircraft
  • Completed bachelor thesis on simulating aircraft capacity from an airport perspective, applying operations research models using Excel VBA
Oct 2018 - Jul 2019
10 months

Working Student

QuaRisMa GmbH

  • Neural network programming with Python - Pattern recognition
  • Applied statistical methods with R and Python
  • Quality management - Lean Six Sigma approach with Minitab

Languages

German
Native
Chinese
Native
English
Advanced

Education

Oct 2016 - Jul 2020

Darmstadt University of Applied Sciences

Bachelor of Science · Applied Mathematics · Darmstadt, Germany

Oct 2013 - Jul 2016

TU Darmstadt

Electrical and Computer Engineering · Darmstadt, Germany

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