Hang Wu

Observer
DISC Type : ci

Member of Technical Staff at Perplexity

Menlo Park, California, United States

Overview

Hang Wu is a machine learning specialist at Perplexity, focusing on LLM post-training and reward hacking. A Ph. D. graduate from Georgia Institute of Technology, his expertise is in reinforcement learning, which he previously applied at scale as a Staff Research Scientist at ByteDance to enhance user personalization systems.

He has a consistent track record of applying machine learning to solve complex problems, from improving video compression speed at Google to enhancing medical image segmentation at Intuitive Surgical.

Unique fact: He describes his career focus on optimizing complex systems with the phrase, "different rewards, same hacking. "

Personality Overview

Example Seeker

Value Driven

Curious

They are likely to ask many questions and look heavily for supporting information.  They can sound friendly and charming but can quickly change gears to become inquisitive and probing. They are generally good communicators and can be hard to convince.

Topics They Care About

LLM Alignment
His current role at Perplexity involves "reward hacking" for large language model post-training, a critical component of ensuring AI systems align with human intent.
Applied Reinforcement Learning
At ByteDance, he architected and scaled the end-to-end infrastructure for RL-based user personalization models for platforms like TikTok.
Causal Inference
His Ph. D. thesis at Georgia Tech focused on developing meta-learning algorithms for adaptive causal inference from off-policy data.

Media Appearances

Hang has no verified media appearances

Work History

9-2025
Member of Technical Staff at Perplexity
9-2020 - 10-2025
Staff Research Scientist at ByteDance
8-2015 - 5-2020
Graduate Research Assistant at Georgia Institute of Technology
5-2018 - 8-2018
Software Engineer Intern at Google
5-2017 - 8-2017
Machine Learning Intern at Intuitive Surgical

Education

2015 - 2020
Doctor of Philosophy (Ph.D.) from Georgia Institute of Technology
2010 - 2014
Bachelor of Engineering (B.Eng.) from Tsinghua University

More Information

Social Presence :

Prographics :

Exp : 7 Location : Menlo Park, California, United States Job Level : N/A Designation : Member of Technical Staff at Perplexity
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Insights For Selling To Hang

During A Call Or A Meeting

DO's

  • Be prepared for a lot of questions, answer them objectively
  • Focus on immediate action-items rather than the larger goals
  • Invite them for a social do but don’t rely solely on the relationship

DONT's

  • Don’t brush off any concerns, take all questions seriously
  • Avoid making offhand commitments
  • Don’t be too objective but make sure to pad your storytelling with data points

When Cold Calling

When Writing An Email

While Negotiating & Closing

    The secret to closing fast with Hang is

  • Proven value, strong testimonials are important to them, relationships will have some weightage.
  • Will you ever get a clear answer from Hang

  • They are practical and friendly, don't expect a clear-cut response often.

Insights For Deal Planning

    How fast (or slow) will Hang move?

  • They like to be detailed and take their time to arrive at decisions.
  • Can Hang take some risk or not?

  • They evaluate their decisions systematically and are less likely to take risks.

You And Hang

Personality Compatibility


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