Machine Learning Engineer Intern (TikTok BRIC Account Security) - 2027 Start (PhD)

TikTok; Singapore; Hybrid; SGD 20,000 - 27,000; Part time

Job summary

TikTok invites students to join the BRIC team for an internship focused on building AI-driven risk defense systems that safeguard the global content ecosystem. You will work across social, live streaming, e-commerce, and payments domains, applying algorithms and multi-source data to detect and mitigate account security risks under real-world conditions.

The program emphasizes hands-on learning, collaboration with industry experts, and opportunities to contribute to cutting-edge AI research and

Qualifications

• Majors in Computer Science, Data Science, Machine Learning, or related fields.
• Strong engineering capabilities in LLM/Agent frameworks, with proficiency in mainstream agent tools.
• Solid engineering skills, with proficiency in Python, SQL, and deep learning frameworks such as PyTorch and TensorFlow.

Responsibilities

• Leverage algorithms and cutting-edge AI technologies/tools to address account security-related risk issues across TikTok and other overseas business lines, including scenarios such as social, live streaming, e-commerce, local services, and payment.
• Tackle specific account security challenges, including but not limited to: fraudulent bulk registration, account trading, malicious account farming, account theft, and ticket hijacking.
• Build features and perform representation learning based on multi-source data (e.g., account behavior, ecosystem behavior, device fingerprints, graph relationships, text and image content, etc.) to enhance both real-time and offline perception and detection capabilities; conduct model evaluation and online experimentation, with close attention to stability, drift monitoring, and interpretability.
• Explore and develop a risk-control Agentic AI architecture, including the design and optimization of Skills, long-chain task orchestration, and multi-agent collaborative problem-solving, to improve the efficiency of risk identification and incident resolution.

Skills

LLM/Agent frameworks

Python

SQL

PyTorch

TensorFlow

Education

CS/DS/ML related field

Job description

Discover a career that energizes and excites you every day.

@2026 TikTok

Algorithm

Employment Type

Intern

Job Code

A23234

TikTok is a world-leading short-video and live streaming platform serving hundreds of millions of users globally. By joining the BRIC (Business Risk Integrity Control) team, you will work in one of the industry's most challenging risk environments, where massive scale, high concurrency, evolving abuse patterns and global adversarial ecosystems continuously reshape the landscape. You will build the next generation of intelligent, data-driven risk defense systems, combining strategy, product thinking and AI to safeguard the health of the global content ecosystem and continuously raise the industry's standard for risk governance. We are looking for talented individuals to join us for an internship. PhD internships at Our Company provide students with the opportunity to actively contribute to our products and research, as well as to the organization's future plans and emerging technologies. Our dynamic internship experience blends hands-on learning, enriching community-building and professional development events, and collaboration with industry experts.

Responsibilities

• Leverage algorithms and cutting-edge AI technologies/tools to address account security-related risk issues across TikTok and other overseas business lines, including scenarios such as social, live streaming, e-commerce, local services, and payment.
• Tackle specific account security challenges, including but not limited to: fraudulent bulk registration, account trading, malicious account farming, account theft, and ticket hijacking.
• Build features and perform representation learning based on multi-source data (e.g., account behavior, ecosystem behavior, device fingerprints, graph relationships, text and image content, etc.) to enhance both real-time and offline perception and detection capabilities; conduct model evaluation and online experimentation, with close attention to stability, drift monitoring, and interpretability.
• Explore and develop a risk-control Agentic AI architecture, including the design and optimization of Skills, long-chain task orchestration, and multi-agent collaborative problem-solving, to improve the efficiency of risk identification and incident resolution.

Qualifications

Minimum Qualification(s)

• Majors in Computer Science, Data Science, Machine Learning, or related fields.
• Strong engineering capabilities in LLM/Agent frameworks, with proficiency in mainstream agent tools. In-depth research experience in areas such as planning & reasoning, long-chain task orchestration, memory & knowledge, and Loop Engineering is highly desirable.
• Solid engineering skills, with proficiency in Python, SQL, and deep learning frameworks such as PyTorch and TensorFlow.

Preferred Qualification(s)

• Candidates with high-quality publications at top-tier conferences are strongly preferred.
• Genuine interest in the risk control domain, which features highly adversarial scenarios, and a strong willingness to embrace challenges are preferred.

Job Information

About TikTok

TikTok is the leading destination for short-form mobile video. At TikTok, our mission is to inspire creativity and bring joy. TikTok's global headquarters are in Los Angeles and Singapore, and we also have offices in New York City, London, Dublin, Paris, Berlin, Dubai, Jakarta, Seoul, and Tokyo.

Why Join Us

Inspiring creativity is at the core of TikTok's mission. Our innovative product is built to help people authentically express themselves, discover and connect – and our global, diverse teams make that possible. Together, we create value for our communities, inspire creativity and bring joy – a mission we work towards every day.

We strive to do great things with great people. We lead with curiosity, humility, and a desire to make impact in a rapidly growing tech company. Every challenge is an opportunity to learn and innovate as one team. We're resilient and embrace challenges as they come. By constantly iterating and fostering an "Always Day 1" mindset, we achieve meaningful breakthroughs for ourselves, our company, and our users. When we create and grow together, the possibilities are limitless. Join us.

Diversity & Inclusion

TikTok is committed to creating an inclusive space where employees are valued for their skills, experiences, and unique perspectives. Our platform connects people from across the globe and so does our workplace. At TikTok, our mission is to inspire creativity and bring joy. To achieve that goal, we are committed to celebrating our diverse voices and to creating an environment that reflects the many communities we reach. We are passionate about this and hope you are too.