Prompt Engineering Specialist

TikTok; Singapore; On-site; SGD 90,000 - 140,000; Full time

Job summary

TikTok is seeking a Prompt Writer Specialist in Singapore to design and refine prompts for AI moderation. You will review text, images, videos, and ads to improve AI-powered moderation systems and align outputs with policies.

Collaborate with Product, Engineering, Policy, and Data Science to drive model accuracy, maintain documentation of prompt experiments, and identify content trends for policy updates.

Qualifications

• Strong written and spoken English.
• Ability to analyze large datasets and interpret model outputs.
• Meticulous attention to detail and process discipline.
• Willing to work rotating shifts, including weekends and holidays.
• Experience in content moderation and data labeling operations.
• Background in reviewing AIGC content (text, images, video).
• Experience with prompt engineering and NLP.
• Familiarity with policy interpretation and calibration.
• Strong documentation and test-result tracking.

Responsibilities

• Prompt engineering to align model outputs with policies.
• Create and iterate prompts translating policy knowledge into components.
• Label and categorize content across text, images, video.
• Produce annotations and datasets for model training and evaluation.
• Collaborate with Product, Engineering, Policy, QA, Data Science, and Operations.
• Participate in calibration sessions to maintain consistency.
• Identify emerging content trends and improve guidelines.

Skills

English proficiency

Analytical skills

Decision making

Research skills

Problem solving

Computer literacy

Self-motivation

Graphic content review

Shift work

Content moderation

AIGC content review

Prompt engineering

NLP

Model evaluation

Quality assurance

Policy familiarity

Calibration sessions

Documentation practices

Job description

About the TeamThe ModLab AIGC (Artificial Intelligence Generated Content) Team is part of the Monetization Integrity Operations organization within Trust & Safety.Our team specializes in reviewing, labeling, and evaluating content that powers the next generation of AI moderation systems. By producing high‑quality datasets and identifying emerging content trends, we help improve machine learning models, strengthen moderation accuracy, refine policies, and support safer advertising experiences across TikTok's products.We work closely with cross‑functional partners including Product, Engineering, Data Science, Policy, Quality, and Machine Learning teams to ensure AI systems continue to evolve responsibly while balancing user safety and business growth.---About the RoleThis role combines prompt engineering expertise with deep content moderation and labeling knowledge. Prompt Writers must understand policies and labeling workflows inside‑out to effectively troubleshoot, iterate, and optimize AI prompts.As a Prompt Writer Specialist, you will play a crucial role in designing and refining prompts to enhance the performance of AI models. You will also review and label text, images, videos, advertisements, and other content to improve TikTok's AI‑powered moderation systems.Your work will directly contribute to the development of machine learning models that detect policy‑violating content, improve moderation accuracy, and support product innovation across multiple business lines. By aligning model outputs with policies through prompt engineering, you'll help ensure that AI systems understand and moderate online content responsibly.This role requires strong analytical thinking, attention to detail, sound judgment, and the ability to make consistent decisions in a fast‑paced environment.---What You'll Be DoingPrompt Engineering- Align model outputs with policies via prompt engineering, including mastering TikTok Ad Policies and translating policy knowledge into written definitions, explanations, and prompt instructions.- Create and iterate prompts by translating policy knowledge and labeling standards into structured prompt components.- Perform logical breakdown and evaluation of prompts via root‑cause analysis to identify issues and strategize prompt reiteration.- Maintain detailed documentation of prompt engineering processes, including prompt variations, test results, and iterative changes.- Analyze large datasets, interpret model outputs, and derive actionable insights to continuously improve prompt performance.Content Moderation & Labeling- Label and categorize content (text, images, video, multimedia) according to established taxonomy standards and moderation policies.- Produce accurate annotations and datasets that help train, evaluate, and improve AI and machine learning models.- Perform quality reviews to ensure labeling consistency and identify opportunities for continuous improvement.- Escalate ambiguous or complex cases appropriately and participate in discussions to improve policy clarity.- Participate in calibration sessions to maintain consistency across reviewers and prompt iterations.- Identify emerging content trends and provide structured feedback to improve moderation guidelines, workflows, and AI models.Cross-Functional Collaboration- Work closely with cross‑functional teams including Product, Engineering, Policy, Quality Assurance, Data Science, and Operations to improve moderation effectiveness and prompt accuracy.- Stay updated with evolving moderation policies and ensure consistent application across all assigned work.- Meet productivity, quality, and turnaround time expectations while maintaining high standards.

Qualifications

Minimum Qualifications- Strong written and spoken English, with excellent communication skills and the ability to work collaboratively in a fast‑paced environment.- Strong analytical and research skills, with the ability to analyze large datasets, interpret model outputs, and derive actionable insights.- Strong decision‑making and problem‑solving skills, with meticulous attention to detail and a strong commitment to following processes.- Good computer literacy and comfortable learning new internal tools and systems.- Self‑motivated and innovative, with the ability to think outside the box to design effective prompts and adapt to evolving project requirements.- Comfortable reviewing sensitive or graphic content.- Able to work rotating shifts, including weekends and public holidays.

Preferred Qualifications- 2+ years of experience in content moderation, Trust & Safety, content review, or data labeling operations within a technology company (e.g., social media, AI, e‑commerce, search, or online platforms).- Experience reviewing content (AIGC), including text, images, videos, or synthetic media.- Experience in prompt engineering, natural language processing, or AI model evaluation.- Experience in quality assurance, auditing, or content quality review.- Familiarity with interpreting and applying content moderation or advertising policies.- Experience participating in calibration sessions or maintaining annotation quality and consistency.- Experience with documentation of processes, test results, and iterative improvements.

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.

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