Johnson Tseng

Stay hunger, stay foolish


2025 -
I co-founded Semalytica, a data platform focused on semiconductors, turning complex manufacturing and test data into actionable insights.

Semalytica build advanced tools for fabs and engineering teams with deep insights from process, test, and equipment data turning raw complexity into smart decisions that improve yield, efficiency, and innovation.

We bring AI into semiconductor workflows, combining domain expertise, data infrastructure, and customizable insight engines to unlock next-level manufacturing intelligence.

2024 -
I worked as software engineer in
2017 - 2022
During my internship at Advantech, I participated the development and deployment of AgentBuilder, an internal GenAI application development platform. In Q2 2024, we successfully integrated AgentBuilder with the company’s data platform, DataInsight, and supported the factory team in building 12 generative AI applications within three months. These solutions collectively saved dozens of work hours per week and were later rolled out company wide in Q3 2024.

Beside, I deployed open-source LLMs using vLLM and SGLang inference engines and built an automated benchmarking and performance evaluation pipeline. This system enables internal teams to test and compare LLM performance across Advantech hardware products and has been internally open-sourced for cross-departmental use, particularly by the hardware division.

2024
My PhD was focused on convolutional/recurrent neural networks and their applications in computer vision, natural language processing and their intersection. My adviser was Fei-Fei Li at the Stanford Vision Lab and I also had the pleasure to work with Daphne Koller, Andrew Ng, Sebastian Thrun and Vladlen Koltun along the way during the first year rotation program.

I designed and was the primary instructor for the first deep learning class Stanford - CS 231n: Convolutional Neural Networks for Visual Recognition. The class became one of the largest at Stanford and has grown from 150 enrolled in 2015 to 330 students in 2016, and 750 students in 2017.

Along the way I squeezed in 3 internships at (a baby) Google Brain in 2011 working on learning-scale unsupervised learning from videos, then again in Google Research in 2013 working on large-scale supervised learning on YouTube videos, and finally at DeepMind in 2015 working on the deep reinforcement learning team.
2022 - 2024
I participated in the Undergraduate Research Opportunities Program (UROP) hosted by the MIT Media Lab wehn study in National Taipei University of Technology. As part of the City Science Group, I collaborated on projects that leveraged advanced computational techniques and urban data driven analytics to generate real world insight.
teaching
I served as the president of my university's programming club, where I also led instruction on the latest developments in AI and software engineering. I was passionate about making programming accessible to everyone, often designing lessons that demonstrated how code can be integrated into everyday life.
In 2022, I co-designed and served as both a teaching assistant and instructor for the course Deep Learning for Digital Image Analysis at National Taipei University of Technology. The course covered cutting edge deep learning techniques with hands-on projects and quickly grew in popularity—expanding from 50 enrolled students in 2022 to over 100 in 2023, becoming one of the largest classes in the Department of Electrical Engineering.
featured writing
I run a personal blog where I share a wide range of content from reflections on life and career to deep dives into technology. Below is a selection of some of my posts:
my pet projects
Book insight
VDD
Botender is a lightweight AI messaging middleware (with a twist! 🤖🍸). It bridges AI applications to messaging platforms and offering a unified interface for bot interactions. Built in Go using the Gin web framework.