Tetsui Ohkubo

I'm an ML Engineer based in Mountain View, CA, currently working on perception models for self-driving cars at Waymo. I used to work on ML infrastructure at Nuro (another self-driving car company).

• GitHub
• LinkedIn
• Please feel free to reach out to me at: peryaudo@gmail.com

Projects (ML related)

• orange - re-implementation of PyTorch-like autograd with numpy
• resnet - PyTorch implementation of ResNet (Deep Learning, Computer Vision, PyTorch)
• centernet - PyTorch implementation of CenterNet (Deep Learning, Object Detection, PyTorch)
• unet_coloring - coloring grayscale flower images using U-Net with self-attention (Deep Learning, U-Net, PyTorch, PyTorch Lightning, Hugging Face Datasets)
• peryagpt - decoder-only transformer trained from scratch with English Wikipedia (Deep Learning, Transformers, PyTorch)
• llmchan - GPT2 fine tuned to generate comments for Japanese news articles (GPT2, Hugging Face Transformers)

Old projects (non-ML related)

• bcwallet (2014) - educational Bitcoin wallet written in ~800 lines of Ruby (Bitcoin, Blockchain, Cryptocurrency)
• Peryan (2014) - LLVM-based compiler for an original BASIC-like language (C++, LLVM)
• trax (2016) - alpha-beta game AI for a board game called Trax (C++, Alpha-beta pruning, game AI)
• haspt (2014) - small physically-based path-tracing renderer written in Haskell (Haskell, Computer Graphics, physically-based rendering)
• midi.cc (2022) - converts a MIDI file to WAV with FM synthesis (C++, FM synthesis)
• gunziptest.cc (2022) - re-implementation of Deflate algorithm (C++)
• PeryaKTPatcher (2010) - dynamically patching the free online touch typing game so that it can run on VMWare (C, Win32)
• LibreEJ (2021) - public domain English-Japanese dictionary (Python, OpenCV)
• tcjudge (2016) - runs TopCoder solution judgement locally (Ruby)
• bitchan (2017) - blockchain based anonymous textboard (Go)
• prprintf (2015) - re-implementation of printf with x86 assembly (x86 assembly)

Work

• Waymo (Mountain View, CA) - Senior Software Engineer (2025 -)
  • Working on perception models for self-driving cars
• Nuro (Mountain View, CA) - Senior ML Engineer (2024 - 2025)
  • Worked on self-driving cars
  • Worked on the ML Infrastructure for Nuro’s perception & behavior models (training and inference)
  • Keywords: Deep Learning, TensorFlow, PyTorch, Keras3, Computer Vision, Edge ML, TensorRT, C++, Python
• Google (Mountain View, CA) - Google Maps Automotive - Senior Software Engineer (2021 - 2024)
  • in-vehicle AI perception system for lane level navigation
  • Keywords: Deep Learning, TensorFlow, Computer Vision, Edge ML, Model Quantization, C++, Python, Apache Beam, Large Scale Data Analysis, Connected Cars
• Google (Tokyo, Japan) - Chrome OS - Senior Software Engineer (2017 - 2021)
  • Start menu & notification UI for Chrome OS, Android emulator
  • Keywords: UI programming, Android, C++, Java, Go

Education

• Bachelor of Engineering (Computer Science), Keio University (2017)

Awards

• ACM-ICPC World Finals (2017)
• Fujiwara Award, Keio University (2017)
• Matsuyama Mayor Award, Ehime University Programming Open Challenge (2011)