David Dai - Policy Specialist & Analyst

Q: Where is David based?

David is based in Berlin, Germany .

Q: What languages does David speak?

David speaks the following languages: German (Native), Chinese (Native), English (Advanced) .

Q: How many years of experience does David have?

David has at least 7 years of experience. During this time, David has worked in at least 5 different roles and for 3 different companies . The average length of individual experience is 1 year and 4 months . Note that David may not have shared all experience and actually has more experience.

Q: What is David's latest experience?

David's most recent position is Policy Specialist & Analyst at Tiktok GmbH / Bytedance Ltd. .

Q: What companies has David worked for in recent years?

In recent years, David has worked for Tiktok GmbH / Bytedance Ltd. .

Q: Which industries is David most experienced in?

David is most experienced in industries like Media, Entertainment and Publishing , Information Technology (IT) , and Professional Services . David also has some experience in Transportation and Logistics .

Q: Which business areas is David most experienced in?

David is most experienced in business areas like Quality Assurance (QA) , Operations , and Information Technology (IT) . David also has some experience in Business Intelligence and Research and Development (R&D) .

Q: Which industries has David worked in recently?

David has recently worked in industries like Media, Entertainment and Publishing and Information Technology (IT) .

Q: Which business areas has David worked in recently?

David has recently worked in business areas like Quality Assurance (QA) , Operations , and Information Technology (IT) .

Recommended expert

Berlin, Germany

Experience

May 2023 - Present

2 years 10 months

Policy Specialist & Analyst

Tiktok GmbH / Bytedance Ltd.

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
Collaborated across functions to handle impactful escalations and maintain platform safety
Conducted agile mechanisms to prevent harmful content such as hate speech, fake news, misinformation on events like German Election (2025), Olympic Games Paris (2024), and harmful AIGC
Collaborated with product and data science teams to improve the efficiency and accuracy of AI moderation processes
Applied techniques including RLHF with high-quality data labeling, prompt engineering, model refinement by translating policy wording into decision trees
Automated processes with Python coding
Created SOPs and metrics for model iteration and result tracking

Nov 2021 - May 2023

1 year 7 months

DACH Market Specialist

Tiktok GmbH / Bytedance Ltd.

Partnered with cross-functional teams to conduct in-depth analysis of core quality metrics (FNP/FPR, accuracy, F1 score)
Led initiatives resulting in measurable enhancements, including lean moderation processes to be more agile and controllable
Developed customized dashboards and datasets using SQL to transform raw metrics into clear visualizations and actionable insights for quality monitoring
Oversaw the end-to-end escalation process for critical content safety issues and facilitated company-wide rollout of new moderation policies

Nov 2020 - Oct 2021

1 year

Quality Analyst

Tiktok GmbH / Bytedance Ltd.

Reviewed and improved content moderation quality to avoid false overkill and violation leakage
Defined measurable key quality metrics including moderation accuracy using DMAIC method and improved metrics significantly through root-cause analysis
Developed tools with SQL and advanced spreadsheet skills to extract insights from raw data, detect anomalies, and calculate moderator performance

Nov 2019 - Jun 2020

8 months

Internship + Thesis

Fraport AG

Contributed to analysis and improvement of airport operations by reducing and optimizing turnaround time (TAT) of aircraft
Completed bachelor thesis on simulating aircraft capacity from an airport perspective using operations research models in Excel-VBA

Oct 2018 - Jul 2019

10 months

Working Student

QuaRisMa GmbH

Programmed neural networks with Python for pattern recognition
Applied statistical methods using R and Python
Implemented quality management processes using Lean Six Sigma approach with Minitab

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Media and Entertainment (5.5 years), Information Technology (4.5 years), Professional Services (1 year), and Transportation (0.5 years).

Media and Entertainment

Information Technology

Professional Services

Transportation

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Quality Assurance (6 years), Operations (5 years), Information Technology (3.5 years), Business Intelligence (2.5 years), and Research and Development (1.5 years).

Quality Assurance

Operations

Information Technology

Business Intelligence

Research and Development

Skills

Advanced Skills In Ms-offices With Vba / Macro
Database-management With Sql
Data Analysis/science With Python, R And Matlab
Basic Programming Knowledge In C++ And Java
Quality Management - Lean Six Sigma Approach

Languages

German

Native

Chinese

Native

English

Advanced

Education

Oct 2016 - Jul 2020

Darmstadt University of Applied Sciences

Bachelor of Science, Applied Mathematics · Applied Mathematics · Darmstadt, Germany

Oct 2013 - Jul 2016

TU Darmstadt

Electrical and Computer Engineering · Darmstadt, Germany

Profile

Created

November 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is David based?

David is based in Berlin, Germany.

What languages does David speak?

David speaks the following languages: German (Native), Chinese (Native), English (Advanced).

How many years of experience does David have?

David has at least 7 years of experience. During this time, David has worked in at least 5 different roles and for 3 different companies. The average length of individual experience is 1 year and 4 months. Note that David may not have shared all experience and actually has more experience.

What roles would David be best suited for?

Based on recent experience, David would be well-suited for roles such as: Policy Specialist & Analyst, DACH Market Specialist, Quality Analyst.

What is David's latest experience?

David's most recent position is Policy Specialist & Analyst at Tiktok GmbH / Bytedance Ltd..

What companies has David worked for in recent years?

In recent years, David has worked for Tiktok GmbH / Bytedance Ltd..

Which industries is David most experienced in?

David is most experienced in industries like Media, Entertainment and Publishing, Information Technology (IT), and Professional Services. David also has some experience in Transportation and Logistics.

Which business areas is David most experienced in?

David is most experienced in business areas like Quality Assurance (QA), Operations, and Information Technology (IT). David also has some experience in Business Intelligence and Research and Development (R&D).

Which industries has David worked in recently?

David has recently worked in industries like Media, Entertainment and Publishing and Information Technology (IT).

Which business areas has David worked in recently?

David has recently worked in business areas like Quality Assurance (QA), Operations, and Information Technology (IT).

What is David's education?

David holds a Bachelor in Applied Mathematics from Darmstadt University of Applied Sciences and a Bachelor in Electrical and Computer Engineering from TU Darmstadt.

What is the availability of David?

David is immediately available full-time for suitable projects.

What is the rate of David?

David's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.