Julia tips for R useRs
Julia Tips for R useRs
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ZJ
Mentor
(6 reviews)
US$25.00
For every 15 mins
32
Sessions/Jobs
ABOUT ME
Machine Learning Data Scientist at Team Lead level
Machine Learning Data Scientist at Team Lead level
I am a Machine Learning developer and Data scientist Team Lead. I am use R, Python, Julia, and Scala daily and have extensive experience with machine learning both at a user-level and at a developer level.
I develop a number of popular data science/machine learning open-source packages including diskframe.com - a larger-than-RAM data manipulation framework in R and JLBoost.jl - a hackable gradient tree-boosting library and XGBoost-like in pure-Julia.
I have been working in the finance industry for over 10 years specializing in building credit risk models using Julia, R, and SAS. I have lead projects in provisioning (IFRS9), stress testing, capital (Basel II/III), and application/behavioural scorecards.
I hold a Master of Statistics and a first-class honours degree in mathematics.
Chinese, English
Melbourne (+10:00)
Joined September 2017
EXPERTISE
10 years experience
1 year experience | 2 endorsements
Extensive experience with Julia
Extensive experience with Julia
10 years experience
I have experience with developing xgboost, lightGBM, and neural network methodds.
I have experience with developing xgboost, lightGBM, and neural network methodds.
10 years experience
10 years experience
REVIEWS FROM CLIENTS
(6 reviews)
Harry Smith
June 2021
ZJ is awesome. Clear communicator and straight to the point. Rate really highly !
skyyaya28
September 2020
ZJ writes really great explanations for his solution to the freelance problems. He is also thorough and well crafted with his code. I recommend his professional help to anyone who is looking to complete a task and to learn from it.
kapple19
July 2020
Very clear explanations, solved my issues, was open and communicative. Would definitely hire again.
Jimmie Butler
June 2020
ZJ was a great help on a niche topic.
Jake Kae
April 2019
Quickly finished the assigned job and allowed me to look over the work to ensure quality and ask questions. Highly recommend!
katrina gething
April 2019
Succinct and on time.
katrina gething
April 2019
Super quick and right on brief.
katrina gething
April 2019
Very helpful and easy to work with!
SOCIAL PRESENCE
disk.frame
Fast disk-based parallelized data manipulation framework for larger-than-RAM data
R
196
12
FstFileFormat.jl
Julia bindings for the fst format
Julia
9
1
4541 Reputation
11
51
74
What I would like to see in R 5.0
R has been my go to language since 2008 and it has grown into an amazingly productive environment since then with the introduction of Rstudio, Shiny, and dplyr into the ecosystem. One standout...
2
How to turn Jupyter notebooks into PDF slides?
How to turn Jupyter notebooks into PDF slides?
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EMPLOYMENTS
Principal Consultant
evalparse.io
2017-07-01-Present
Used machine learning to build credit risk models
Used machine learning to build credit risk models
Python
R
Pandas
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Python
R
Pandas
Julia
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PROJECTS