Senior Data Scientist

Tencent; Singapore; On-site; SGD 120,000 - 170,000; Full time

Job summary

Tencent is seeking a skilled ML professional to design safety frameworks for safeguarding user accounts within the WeChat ecosystem. You will leverage data analytics and machine learning to detect anomalies, develop fraud detection strategies, and deploy real-time models in collaboration with engineering, product and risk teams.

The role requires effective communication with international stakeholders and a solid background in ML/DL, Python, and relevant programming languages.

Qualifications

• Minimum 2 years of work experience with a relevant bachelor's degree.
• Ability to communicate complex ideas to non-technical stakeholders.
• Experience building ML or DL solutions.

Responsibilities

• Design and optimize end-to-end safety frameworks and workflows.
• Use data analytics and ML to detect anomalies across the WeChat ecosystem.
• Develop fraud detection strategies including risk signals and features.
• Build and deploy scalable ML models for real-time risk detection.
• Collaborate with engineering, product, and risk teams to implement safety solutions.
• Evaluate model performance with A/B testing and monitoring.
• Stay ahead of emerging fraud patterns with new signals and modeling.

Skills

Python

Machine learning

Deep learning

Communication

C/C++/Go

Education

Bachelor's degree in Computer Science, Data Science, Mathematics, Economics, or Statistics or similar quantitative field

Tools

Go

Job description

Business Unit

WeiXin Group(WXG) is responsible for the construction and operation of the Weixin ecosystem and leveraging Weixin's open platforms such as Official Accounts, Mini Programs, WeChat Pay, WeCom and search function. WXG provides solutions and connectivity for intelligent upgrades across all industries. WXG is also responsible for the development and operation of QQ Mail, WeRead and other products.

Business Unit

WeiXin Group(WXG) is responsible for the construction and operation of the Weixin ecosystem and leveraging Weixin's open platforms such as Official Accounts, Mini Programs, WeChat Pay, WeCom and search function. WXG provides solutions and connectivity for intelligent upgrades across all industries. WXG is also responsible for the development and operation of QQ Mail, WeRead and other products.

What The Role Entails

• Design and optimize end-to-end safety frameworks, including policies, workflows, and rule engines, to safeguard user accounts while continuously enhancing overall user experience and minimizing friction.
• Leverage data analytics and machine learning techniques to identify behavioral patterns, detect anomalies, and proactively uncover malicious activities across the WeChat ecosystem.
• Develop and iterate fraud detection strategies, including risk signals, feature engineering, and rule-based / model-driven approaches to effectively identify and mitigate spam, abuse, and fraudulent accounts.
• Build, deploy, and maintain scalable machine learning models for real-time risk detection, ensuring high precision and recall while adapting to evolving threat patterns.
• Partner cross-functionally with engineering, product, and risk teams to translate data insights into production-ready safety solutions, ensuring alignment between detection capability, system performance, and business goals.
• Continuously evaluate and optimize model performance, balancing trade-offs between user experience and risk control through A/B testing, monitoring, and feedback loops.
• Stay ahead of emerging fraud patterns and adversarial behaviors, incorporating new data signals and advanced modeling techniques (e.g., graph-based detection, LLM-assisted analysis) to strengthen detection capabilities.

Who We Look For

• Minimum 2 years of work experience equipped with a Bachelor degree in Computer Science, Data Science, Mathematics, Economics, or Statistics or similar quantitative field
• Ability to communicate complex ideas to non-technical stakeholders in a way they can easily understand and appreciate.
• Experience on building machine learning or deep learning solutions
• Good knowledge of Python programming language, C/C++/Go programming language is preferred
• Self-driven, innovative, collaborative, with good communication and presentation skills, able to translate between business and technical audiences
• Fluency in both English and Mandarin to deal with international stakeholders and stakeholders who are based in HQ

Equal Employment Opportunity at Tencent

As an equal opportunity employer, we firmly believe that diverse voices fuel our innovation and allow us to better serve our users and the community. We foster an environment where every employee of Tencent feels supported and inspired to achieve individual and common goals.