Toshiki Teramura

Shiga Prefecture, Japan

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Summary

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Toshiki Teramura is a software engineer and Ph.D. in fluid dynamics with 14 years of experience bridging nonlinear dynamical systems research and high-performance scientific software. His work ranges from developing data-assimilation methods for nonlinear weather forecasting at RIKEN AICS to compiler/runtime work for PEZY processors and scientific software engineering at RICOS. He is an early adopter of Rust for scientific computing and contributes to notable OSS projects such as rust-num/num-traits and PyO3/rust-numpy, helping to make numeric and NumPy C-API interactions ergonomic from Rust. Toshiki blends deep theoretical expertise in turbulence and dynamical systems with practical skills in LLVM, C++, Python, and Rust, often building tooling that connects high-dimensional simulations to interactive workflows. Based in Shiga, Japan, he pursues cutting-edge computation including quantum and physical reservoir computing, reflecting a sustained interest in novel computational paradigms. An understated strength is his knack for turning advanced mathematical ideas into robust, test-covered code that other scientists can reuse.

14 years of coding experience

6 years of employment as a software developer

Doctor of Philosophy (Ph.D.), Fluid Dynamics, Doctor of Philosophy (Ph.D.), Fluid Dynamics at 京都大学

Japanese, Chinese

Stackoverflow

Stats

208reputation

3kreached

2answers

1question

Github Skills (18)

testing10

capi10

numpy10

binding10

rust10

bind10

data-structure9

algorithm9

algorithms9

ndarray9

data-structures9

boost-python6

jupyter-notebook6

boost6

cmake6

Programming languages (14)

C++LeanRustCCMakeHTMLFortranShell

Github contributions (5)

PyO3/rust-numpy

Apr 2017 - Jul 2018

PyO3-based Rust bindings of the NumPy C-API

Role in this project:

Back-end Developer

Contributions:180 commits, 33 PRs, 111 pushes in 1 year 2 months

Contributions summary:Toshiki's commits primarily focus on setting up the foundational structures for interacting with the NumPy C API using Rust. They began by creating an initial Rust crate structure and then added a subcrate named `numpy-sys` to interface with the NumPy C API. Subsequent commits involve defining and structuring the necessary types and functions from the C API, defining the structure of various NumPy objects such as `PyArray` and `PyUFunc` to support interaction with the NumPy library.

apirust-ndarraynumpy-capindarrayrust-numpy

rust-num/num-traits

Feb 2018 - Sep 2019

Numeric traits for generic mathematics in Rust

Role in this project:

Backend Developer

Contributions:7 commits, 3 PRs, 4 comments in 1 year 7 months

Contributions summary:Toshiki primarily contributed to the `num-traits` repository by implementing new functionality and improving existing code. They added features like `clamp_lower` and `clamp_upper`, and subsequently refactored them to `clamp_min` and `clamp_max`. The user also updated test cases to ensure correct functionality, including NaN handling. Several commits focused on minor improvements, such as fixing typos and updating import statements.

rustmathematicstraitsgenericnum-traits

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