Machine Learning Engineer Graduate (E-Commerce Recommendation Live) - 2027 Start (PhD

Discover a career that energizes and excites you every day.

@2026 Tik Tok

Technology

Location:

Seattle

Employment Type:

Regular

Job Code:

A28366

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• Build and optimize recommendation models across recall, pre-ranking, ranking, and mixed ranking to improve GMV, conversion, watch time, and long‑term user value.
• Develop cross‑domain and multimodal modeling solutions that connect videos, live streams, products, and user behavior to better power live commerce recommendations.
• Advance next‑generation recommendation technologies, including generative recommendation, large recommendation models, reinforcement learning, and long‑term value optimization.
• Partner with cross‑functional teams to launch scalable solutions, run experiments, and turn research into measurable business impact.

• Minimum Qualifications:
  • Individuals who are completing or have recently completed a PhD degree in Computer Science, Electrical Engineering, Mathematics, Statistics or a related discipline.
  • Solid foundation in machine learning and at least one of the following areas: recommendation systems, search, advertising, NLP, multimodal learning, or large‑scale applied AI.
  • Strong programming skills in Python or C++, and hands‑on experience with deep learning frameworks such as PyTorch.
  • Good understanding of data structures, algorithms, and large‑scale model training or production machine learning systems.
  • Strong analytical and problem‑solving skills, with the ability to translate business problems into effective modeling solutions.
  • Self‑driven and results‑oriented, with the ability to take ownership of model iteration and online impact from end to end.
• Preferred Qualifications:
  • Experience in recommendation systems, especially in live commerce, e‑commerce, search, ads, or other large‑scale consumer products.
  • Experience with generative recommendation, large recommendation models, retrieval and ranking systems, or related recommendation architecture upgrades.
  • Experience with LLMs or multimodal foundation models, including pre‑training, post‑training, representation learning, contrastive learning, SFT, or RL‑based optimization.
  • Experience in cross‑domain transfer learning, LTV modeling, long‑term value optimization, causal inference, or debiasing.
  • Experience with long‑sequence user behavior modeling, multi‑task learning, multi‑interest modeling, or large‑scale distributed training and inference optimization.
  • Publications in top‑tier conferences such as NeurIPS, ICML, ICLR, KDD, ACL, CVPR, SIGIR, or Rec Sys, or strong achievements in major technical competitions.
  • Strong curiosity about new technologies, fast learning ability, and a passion for solving challenging real‑world problems.

The base salary range for this position in the selected city is $153900 - $300960 annually.

Compensation may vary outside of this range depending on a number of factors, including a candidate’s qualifications, skills, competencies and experience, and location. Base pay is one part of the Total Package that is provided to compensate and recognize employees for their work, and this role may be eligible for additional discretionary bonuses/incentives, and restricted stock units.

Benefits may vary depending on the nature of employment and the country work location. Employees have day one access to medical, dental, and vision insurance, a 401(k) savings plan with company match, paid parental leave, short‑term and long‑term disability coverage, life insurance, wellbeing benefits, among others. Employees also receive 10 paid holidays per year, 10 paid sick days per year and 17 days of Paid Personal Time (prorated upon hire with increasing accruals by tenure).

The Company reserves the right to modify or change these benefits…