tkoyama010 Tetsuo Koyama
AI engineer @AKARI-Inc 3D visualization library @pyvista maintainer, @scipy-conference chairperson, Technical Steering Committee of @numfocus photo @pyconjp
EVIDENCE BASE
50
Repositories
20986
Commits
2682
Files analyzed
35
Technologies
374
Evidence
112
Active months
Based on 50 repository passports · 48/50 current
ENGINEERING PROFILE
Frontend27%
Backend70%
Testing81%
DevOps81%
CORE TECHNOLOGIES
HR: name + projects · Lead: + files/LOC · persistence Core≥4
Markdown Core
LANGUAGE · 45/50 repos · 248 files · 16927 LOC
Depth 70 · HIGH
YAML Core
LANGUAGE · 45/50 repos · 225 files · 9496 LOC
Depth 70 · HIGH
Python Core
LANGUAGE · 31/50 repos · 155 files · 34511 LOC
Depth 70 · HIGH
JSON Core
LANGUAGE · 14/50 repos · 68 files · 62031 LOC
Depth 70 · HIGH
JavaScript Core
LANGUAGE · 7/50 repos · 52 files · 6647 LOC
Depth 70 · HIGH
NumPy Core
LIBRARY · 11/50 repos · 38 files · 21086 LOC
pytest Core
TESTING · 12/50 repos · 34 files · 9963 LOC
TypeScript Core
LANGUAGE · 9/50 repos · 29 files · 9545 LOC
Depth 70 · HIGH
Prettier Core
QUALITY · 22/50 repos · 27 files · 27256 LOC
Depth 58 · HIGH
TOML Core
LANGUAGE · 25/50 repos · 26 files · 1133 LOC
Depth 70 · HIGH
pip Core
BUILD_TOOL · 19/50 repos · 19 files · 190 LOC
Depth 80 · HIGH
Shell Core
LANGUAGE · 15/50 repos · 18 files · 470 LOC
Depth 70 · HIGH
Poetry Core
BUILD_TOOL · 15/50 repos · 15 files · 150 LOC
Depth 80 · HIGH
ESLint Recurring
QUALITY · 3/50 repos · 11 files · 46950 LOC
Depth 73 · HIGH
Playwright Recurring
LIBRARY · 3/50 repos · 11 files · 6137 LOC
Depth 74 · HIGH
npm Core
BUILD_TOOL · 10/50 repos · 10 files · 100 LOC
Depth 80 · HIGH
Redis Core
CACHE · 4/50 repos · 5 files · 1343 LOC
Depth 65 · HIGH
Jinja2 Recurring
LIBRARY · 2/50 repos · 4 files · 3039 LOC
Depth 62 · HIGH
Terraform Recurring
LANGUAGE · 2/50 repos · 4 files · 313 LOC
Depth 70 · HIGH
uv Core
BUILD_TOOL · 4/50 repos · 4 files · 40 LOC
Depth 80 · HIGH
RabbitMQ Recurring
MESSAGE_BROKER · 2/50 repos · 3 files · 1845 LOC
Depth 61 · HIGH
Dockerfile Recurring
LANGUAGE · 2/50 repos · 3 files · 83 LOC
Depth 70 · HIGH
Svelte Emerging
FRAMEWORK · 1/50 repos · 2 files · 379 LOC
Depth 66 · HIGH
Next.js Emerging
FRAMEWORK · 1/50 repos · 2 files · 1764 LOC
Depth 62 · HIGH
Rust Emerging
LANGUAGE · 1/50 repos · 2 files · 1142 LOC
Depth 70 · HIGH
Bundler Recurring
BUILD_TOOL · 2/50 repos · 2 files · 20 LOC
Depth 80 · HIGH
Cargo Emerging
BUILD_TOOL · 1/50 repos · 1 files · 10 LOC
Depth 80 · HIGH
orjson Emerging
LIBRARY · 1/50 repos · 1 files · 1800 LOC
Depth 58 · HIGH
Ruff Core
QUALITY · 5/50 repos · 0 files · 0 LOC
mypy Core
QUALITY · 4/50 repos · 0 files · 0 LOC
Black Emerging
QUALITY · 1/50 repos · 0 files · 0 LOC
Requests Core
LIBRARY · 4/50 repos · 0 files · 0 LOC
Jest Emerging
TESTING · 1/50 repos · 0 files · 0 LOC
esbuild Recurring
BUILD_TOOL · 2/50 repos · 0 files · 0 LOC
pandas Core
LIBRARY · 4/50 repos · 0 files · 0 LOC
ENGINEERING HABITS
containerizationobserved
automated_testsobserved
documentationobserved
lintingobserved
formattingobserved
continuous_integrationobserved
Not observed ≠ does not know
PROJECT PORTFOLIO
pyvista-wasm NumPy
pysph-doc-translations Redis
pyvista-js NumPy
awesome-python-data-visualization Markdown
ACTIVITY & OWNERSHIP
Active months 112
Commits 20986
Owner authored 99%
PRIMARY PROFILE — HR VIEW
BackendMarkdown · YAML · PythonHigh ownership
In 30 sec: direction — backend, core — Markdown · YAML · Python, 50 repos 2015 — 2026. No LOC or files — stability only.
DEVELOPER SIGNATURE
MarkdownYAMLPythonJSONJavaScriptHigh ownership
TECHNOLOGY EVOLUTION
2023
JavaScript · React
2024
TypeScript · Next.js
2025
TypeScript · PostgreSQL
2026
TS + Next
COMMUNITY / IMPACT not a skill rating
Stars 190
Forks 29
Watchers 28
EVERYTHING ABOVE IS TRACEABLE
50 repositories · 20986 commits · 2682 files · 374 evidence
Absence of a technology in the passport does not imply lack of experience