holdenk Holden Karau
Holden Karau is trans Canadian, and open source contributor. She is a Spark committer co-author of Learning Spark, High Performance Spark and Kubeflow for ML.
EVIDENCE BASE
50
Repositories
6083
Commits
2613
Files analyzed
54
Technologies
276
Evidence
156
Active months
Based on 50 repository passports · 49/50 current
ENGINEERING PROFILE
Frontend24%
Backend75%
Testing30%
DevOps42%
CORE TECHNOLOGIES
HR: name + projects · Lead: + files/LOC · persistence Core≥4
Scala Core
LANGUAGE · 17/50 repos · 364 files · 21935 LOC
Depth 70 · HIGH
Python Core
LANGUAGE · 22/50 repos · 318 files · 34378 LOC
Depth 70 · HIGH
Markdown Core
LANGUAGE · 40/50 repos · 181 files · 5200 LOC
Depth 70 · HIGH
YAML Core
LANGUAGE · 24/50 repos · 94 files · 8181 LOC
Depth 70 · HIGH
Java Core
LANGUAGE · 6/50 repos · 73 files · 4321 LOC
Depth 70 · HIGH
Django Recurring
FRAMEWORK · 2/50 repos · 45 files · 782 LOC
Depth 74 · HIGH
Shell Core
LANGUAGE · 18/50 repos · 41 files · 2865 LOC
Depth 70 · HIGH
pytest Core
TESTING · 4/50 repos · 39 files · 5513 LOC
Depth 21 · HIGH
Redis Core
CACHE · 5/50 repos · 34 files · 47171 LOC
Depth 88 · HIGH
JavaScript Core
LANGUAGE · 6/50 repos · 31 files · 12108 LOC
Depth 70 · HIGH
Ruby Recurring
LANGUAGE · 2/50 repos · 30 files · 703 LOC
Depth 70 · HIGH
TypeScript Core
LANGUAGE · 7/50 repos · 21 files · 3610 LOC
Depth 49 · HIGH
pandas Recurring
LIBRARY · 3/50 repos · 20 files · 3443 LOC
Depth 74 · HIGH
Apache Kafka Core
MESSAGE_BROKER · 7/50 repos · 18 files · 20867 LOC
Depth 61 · HIGH
JUnit Core
TESTING · 5/50 repos · 14 files · 680 LOC
Depth 78 · HIGH
Requests Core
LIBRARY · 4/50 repos · 13 files · 2592 LOC
pip Core
BUILD_TOOL · 13/50 repos · 13 files · 130 LOC
Depth 80 · HIGH
JSON Core
LANGUAGE · 6/50 repos · 13 files · 43466 LOC
Depth 70 · HIGH
NumPy Core
LIBRARY · 5/50 repos · 12 files · 1202 LOC
Depth 66 · HIGH
XML Core
LANGUAGE · 10/50 repos · 11 files · 1334 LOC
Depth 70 · HIGH
C Recurring
LANGUAGE · 3/50 repos · 10 files · 702380 LOC
Depth 70 · HIGH
C++ Recurring
LANGUAGE · 3/50 repos · 8 files · 165 LOC
Depth 70 · HIGH
Jackson Emerging
LIBRARY · 1/50 repos · 4 files · 442 LOC
Depth 70 · HIGH
Poetry Core
BUILD_TOOL · 4/50 repos · 4 files · 40 LOC
Depth 80 · HIGH
Elasticsearch Recurring
DATABASE · 3/50 repos · 4 files · 383 LOC
Depth 65 · HIGH
TOML Core
LANGUAGE · 4/50 repos · 4 files · 128 LOC
Depth 70 · HIGH
ESLint Emerging
QUALITY · 1/50 repos · 3 files · 7100 LOC
Depth 69 · HIGH
Bundler Recurring
BUILD_TOOL · 3/50 repos · 3 files · 30 LOC
Depth 80 · HIGH
Next.js Emerging
FRAMEWORK · 1/50 repos · 3 files · 6740 LOC
Depth 66 · HIGH
PHP Emerging
LANGUAGE · 1/50 repos · 3 files · 69 LOC
Depth 70 · HIGH
RabbitMQ Recurring
MESSAGE_BROKER · 2/50 repos · 3 files · 831 LOC
Depth 61 · HIGH
Gradle Recurring
LANGUAGE · 2/50 repos · 3 files · 74 LOC
Depth 70 · HIGH
Maven Recurring
BUILD_TOOL · 2/50 repos · 2 files · 20 LOC
Depth 80 · HIGH
PostgreSQL Emerging
DATABASE · 1/50 repos · 2 files · 954 LOC
Depth 69 · HIGH
Click Emerging
LIBRARY · 1/50 repos · 2 files · 200 LOC
Depth 62 · HIGH
Ruby on Rails Emerging
FRAMEWORK · 1/50 repos · 2 files · 22 LOC
Depth 73 · HIGH
MongoDB Emerging
DATABASE · 1/50 repos · 2 files · 614 LOC
Depth 69 · HIGH
AWS SDK Emerging
CLOUD · 1/50 repos · 2 files · 778 LOC
Depth 66 · HIGH
RSpec Emerging
TESTING · 1/50 repos · 1 files · 9 LOC
Depth 41 · HIGH
Svelte Emerging
FRAMEWORK · 1/50 repos · 1 files · 1 LOC
Depth 38 · HIGH
MarkupSafe Emerging
LIBRARY · 1/50 repos · 1 files · 83 LOC
Depth 54 · HIGH
C# Emerging
LANGUAGE · 1/50 repos · 1 files · 206 LOC
Depth 70 · HIGH
Flask Emerging
FRAMEWORK · 1/50 repos · 1 files · 83 LOC
Depth 54 · HIGH
debug Emerging
LIBRARY · 1/50 repos · 1 files · 18 LOC
Depth 45 · HIGH
npm Emerging
BUILD_TOOL · 1/50 repos · 1 files · 10 LOC
Depth 80 · HIGH
Dockerfile Emerging
LANGUAGE · 1/50 repos · 1 files · 24 LOC
Depth 70 · HIGH
python-dotenv Emerging
LIBRARY · 1/50 repos · 0 files · 0 LOC
Gunicorn Emerging
LIBRARY · 1/50 repos · 0 files · 0 LOC
Apache Commons Emerging
LIBRARY · 1/50 repos · 0 files · 0 LOC
Ruff Emerging
QUALITY · 1/50 repos · 0 files · 0 LOC
SLF4J Emerging
LIBRARY · 1/50 repos · 0 files · 0 LOC
Jest Emerging
TESTING · 1/50 repos · 0 files · 0 LOC
Mockito Emerging
TESTING · 1/50 repos · 0 files · 0 LOC
Webpack Emerging
BUILD_TOOL · 1/50 repos · 0 files · 0 LOC
ENGINEERING HABITS
containerizationobserved
automated_testsobserved
documentationobserved
lintingobserved
formattingabsent
continuous_integrationobserved
Not observed ≠ does not know
PROJECT PORTFOLIO
spark-testing-base JUnit
learning-spark-examples MongoDB
elasticsearchspark Shell
spark-structured-streaming-ml Markdown
chef-cookbook-spark Markdown
diversity-analytics Apache Kafka
holdensmagicalunicorn Django
ACTIVITY & OWNERSHIP
Active months 156
Commits 6083
Owner authored 81%
PRIMARY PROFILE — HR VIEW
BackendScala · Python · MarkdownHigh ownership
In 30 sec: direction — backend, core — Scala · Python · Markdown, 50 repos 2009 — 2026. No LOC or files — stability only.
DEVELOPER SIGNATURE
ScalaPythonMarkdownYAMLJavaHigh ownership
TECHNOLOGY EVOLUTION
2023
JavaScript · React
2024
TypeScript · Next.js
2025
TypeScript · PostgreSQL
2026
TS + Next
COMMUNITY / IMPACT not a skill rating
Stars 2787
Forks 984
Watchers 247
EVERYTHING ABOVE IS TRACEABLE
50 repositories · 6083 commits · 2613 files · 276 evidence
Absence of a technology in the passport does not imply lack of experience