LLM Post-training Engineer Graduate (Research & Product) - 2027 Start

TikTok
San Jose
Workplace: OnsiteInternshipFunction: Education & TrainingEducation: bachelorsSkills: ["Learn quickly","Fast-paced","Passion for AI","Collaboration","Data analysis"]

Join TikTok’s Multimedia AI team to develop and optimize LLM post-training strategies, including instruction tuning and preference tuning methods such as SFT/DPO/PPO. Build evaluation pipelines to measure model performance, helpfulness, and safety across multimedia product use cases. Contribute to reward modeling and human preference learning research, collaborate with engineering teams to move work into production for tasks like video understanding and translation, and analyze large-scale datasets to improve alignment quality.

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FursaFursa
TikTok
TikTok
11 hours ago

LLM Post-training Engineer Graduate (Research & Product) - 2027 Start

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Last checked: 11 hours agoStatus: Live

Job Summary

Join TikTok’s Multimedia AI team to develop and optimize LLM post-training strategies, including instruction tuning and preference tuning methods such as SFT/DPO/PPO. Build evaluation pipelines to measure model performance, helpfulness, and safety across multimedia product use cases. Contribute to reward modeling and human preference learning research, collaborate with engineering teams to move work into production for tasks like video understanding and translation, and analyze large-scale datasets to improve alignment quality.
Location: San Jose
Workplace: Onsite
Employment Type: Internship
Job Function: Education & Training
Seniority: Graduate level

Key Responsibilities

  • •Support development and optimization of post-training strategies, including instruction tuning and preference tuning (SFT/DPO/PPO) for alignment.
  • •Build robust evaluation pipelines to measure model performance, helpfulness, and safety across diverse multimedia product use cases.
  • •Participate in research and implementation of methodologies in reward modeling and human preference learning.
  • •Collaborate with engineering teams to bridge experimental research and production-ready AI applications (e.g., video understanding, translation, content classification).
  • •Analyze and process large-scale datasets to identify patterns that improve model behavior and alignment quality.

Key Requirements

  • •Completing or having recently completed a Bachelor's degree in Computer Science, Machine Learning, or a related discipline.
  • •Strong programming skills in Python and experience with deep learning frameworks such as PyTorch or JAX.
  • •Foundational understanding of Transformer architectures and LLM training principles.
  • •Demonstrated ability to learn quickly in a fast-paced environment and strong passion for AI product applications.
  • •Ability to commit to an onboarding date by the end of the year; include availability and graduation date in your resume.
Experience:AIMachine learningLLM fine-tuningMultimodal AI
Education:Bachelor's
Skills:Learn quicklyFast-pacedPassion for AICollaborationData analysis
Tech Stack:PythonPyTorchJAXDeepSpeedMegatron-LMTransformersLLMVideo understandingTranslationContent classification

Company Brief

TikTok
Short-form video platform that lets users create, share, and discover entertainment content through algorithmic recommendations. It also offers advertising and creator tools for brands, influencers, and businesses.
Industry: Digital Media
Company Size: Enterprise (1,001+ employees)
Growth: Scaleup
Headquarters: Singapore, Singapore
Founded: 2016
WebsiteLinkedIn