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TikTok

Short-form video platform with ads

AI Agent Algorithm Engineer New Grad - Global E-Commerce, Affiliate

Natural Language Processing & LLMsConfirmed live in the last 24 hours
Full-timeSingaporeNo salary listedIn-person

About the Job

Requirements

  • Complete or have recently completed a PhD degree in Computer Science, AI, Mathematics, or a quantitative field.
  • Strong Python skills and proficiency in at least one of C++, Go, Rust, or Java.
  • Solid machine learning, deep learning, and natural language processing fundamentals, with hands-on experience with large language models or agents through coursework, research, an internship, competition, open-source work, or a substantial side project.
  • Ability to read a research paper or engineering blog and turn it into working code.

Responsibilities

  • Build and evolve the agent runtime (harness or agent loop) powering creator and seller agents, orchestrating skills, tools, and context.
  • Engineer context and memory for long multi-turn agents, including agentic memory through structured note-taking, context compaction and summarization, context editing and observation masking, and just-in-time retrieval.
  • Post-train and fine-tune large language models using supervised fine-tuning, direct preference optimization, or reinforcement learning, and build a data flywheel that turns served conversations into training, evaluation, and retrieval signals.
  • Design and integrate tools, skills, and Model Context Protocol connectors, and develop skill and tool search for large tool inventories.
  • Build evaluation systems using large language model-as-judge with human-agreement calibration, regression, safety, cost, and latency-aware harnesses, and close the offline-to-online gap.
  • Build a self-evolving loop using replay, task and environment simulation, automatic root-cause analysis, automatic goal/strategy/behavior generation, and automatic policy generation so the system continuously improves itself.
  • Own a high-leverage end-to-end surface and ship it to production across more than 30 languages, measuring outcomes using business metrics including gross merchandise value, content, and creator and merchant satisfaction.

Desired Qualifications

  • Experience building an agent runtime rather than only calling an API, including an agent loop or harness, memory or context-management system, retrieval-augmented generation or tool-use agent, or fine-tuned or post-trained model, including at research, hobby, or competition scale.
  • Hands-on experience in at least one of post-training (supervised fine-tuning, direct preference optimization, reinforcement learning from human feedback, reinforcement learning from AI feedback, reinforcement learning with verifiable rewards, or reward modeling); agent systems (harness, context engineering, Model Context Protocol, skills, sub-agents, or tool search); evaluation (large language model-as-judge, τ-bench, SWE-bench, GAIA, or BFCL); inference and serving (vLLM, TensorRT-LLM, mixture of experts, key/value caching, or prompt caching); or multilingual natural language processing.
  • Publications, strong competition results such as ACM-ICPC, Kaggle, or machine learning competitions, or notable open-source contributions.

About the Company

TikTok

Short-form video platform with ads

TikTok is a short-form mobile video platform that lets people create, discover, and share quick videos. Users upload vertical clips, edit them with built-in tools, and browse a personalized feed powered by an algorithm that highlights relevant content. Advertisers can use in-feed ads, branded hashtags, and the Business Center to plan and measure campaigns, making it easy for brands to reach a global audience. Its goal is to inspire creativity and bring joy by helping people express themselves and by connecting brands with a wide audience.

Company size
10,001+
Company stage
Grant
Total funding
$740K
Headquarters
Santa Monica, CA
Founded
2016

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