Sihan Chen

Experience

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  Huazhong University of Science and Technology

  Jul 2017 - May 2019

  Astrophysics Researcher

  1. Analytically Solved the physics model of slim accretion disks and derived the ODEs.2. Simulated the accretion process of slim accretion disks around supermassive blackholes using Scipy, computed 10+ physical properties of the disk and derived the radiation spectrum. Applied the results to tidal disruption events, which was chosen as an outstanding thesis of the year at the school of physics.

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  Polemaris Advisory Service

  Jul 2018 - Aug 2018

  Data Analyst

  1. Data Scraping: Built a web-crawler using Scrapy, scraped 10000+ ISO standards for different industries from the ISO official website into the company’s database. 2. Data Processing: Built a Python pipeline with Pandas, automated the excel spreadsheets tasks, which lower the time cost of managing the work progress of employees (saved 5 hours every week).3. Data Visualization: Analyzed data of the tourism industry of Bahrain, resulted in an industry analysis report.4. Built an ERP in Excel by using VBA. Show less

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  UCSF Medical Center

  Oct 2019 - Nov 2020

  Machine Learning Researcher

  1. Image Segmentation: Built a 3D Residual U-net to precisely segment metastases from brain MRI images with PyTorch. Evaluated the effects of number, size, and locations of metastases on the accuracy, which has resulted in a scientific conference presentation and a manuscript. The result helps design a state-of-art model.2. Federated Learning: Simulated federated learning for brain metastases segmentation tasks, achieved close results to when training locally. This technique enables the lab to collaboratively learn a shared prediction model while keeping all training data on original hospitals in the future.3. Generative Modeling: Using CycleGAN and Pix2Pix to translate DRR Images to X-ray images. Show less

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  TikTok

  Nov 2020 - Aug 2024

  - Led the full-cycle development of automated risk recognition, management, and interpretability services at TikTok Shop Mall, driving cross-functional team collaboration to enhance platform governance and customer experience.- Developed and deployed large-scale distributed machine learning systems to effectively govern product quality and combat negative actors on the platform.- Leveraged cutting-edge deep learning technologies to significantly solve cold-start problems for new markets and reduce negative reviews by optimizing data architecture and model development processes. Show less

  • Machine Learning Engineer - E-commerce Governance

    Dec 2022 - Aug 2024

  • Machine Learning Engineer - Business Integrity

    Nov 2020 - Dec 2022
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  Hinge

  Aug 2024 - now

  Sr. Machine Learning Engineer

  Working on recommendation system and LLM applications