Jethro Cao-
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https://github.com/jyscao
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https://jyscao.xyz
Professional Experience
Software Engineer @ JOICoin, 03/2023 — present
• To enhance security by eliminating password storage on JOICoin’s own crypto-gaming plaform, built
auth system using Wix’s JavaScript SDK to integrate its site-members backend as the source of truth
• Implemented the JOICoin protocol to gather proof-of-work (PoW) in the form of player activities in
both webapp & WebGL (e.g. Unity) games, which are then used to disburse rewards to players
Backend Engineer @ Datatron Technologies, 04/2022 — 12/2022
• Implemented better notebooks UX workflow for data scientists by adding the auto-containerization
microservice and deployed through Helm on Kubernetes, which increased leads, sales & retentions
• Worked in a 2-person team to migrate deployments & installations from custom methods to standard
tooling like Terraform & Helm, which decreasd AWS bill by 33% & improved development speed
Senior Software Engineer @ Titan Industries, 06/2020 — 04/2022
• Implemented 2FA & reports for Bitcoin mining stats (earnings, hash rates, reject rates, worker statuses,
etc.) in the ASP.NET Core webapp, helping to double user growth in my first half year at the company
• Lead the 3-person BTC mining pool team in redesigning the inter-system communications flow to allow
for extensions to the REST API, and more efficient requests by removing redundant data retrievals
from upstream pool server’s in-memory on-disk storage engine LMDB
Data Scientist @ London School of Economics, 11/2019 — 05/2020
• Worked with econophysics researchers to build a system using NumPy, SciPy, pandas & Matplotlib
for the forecasting of financial markets using stochastic modeling and power law fitting, leading to the
publication of 3 articles; project is public at https://github.com/FinResearch/tail-risk
• Concrete tasks included: implementing parallel computations via Python’s multiprocessing library to
reduce compuation time of highly CPU-bound calculations by 80%; built data-cleaning and validation
pipelines to automate the existing manual process and reduce human errors
Full Stack Web Developer @ Kanguru, 01/2018 — 10/2019
• Worked on pair of mortgage brokerage apps in 4-person team: broker app in CodeIgniter + jQuery,
client app in Laravel + Vue.js; added core features: 2FA, dashboard summary stats, and in-app &
email notifications; the UX improvements drove in-part the app’s greater revenue growth YoY
• To remove operational difficulties and mitigate unsustainable storage costs of using EBS on EC2,
lead migration of >1 million confidential user-uploaded files to AWS S3, thereby eliminating storage
management pain-points, such as EC2 server crashes when EBS storage became full
• To replace outdated & un-upgradable VMware image, created standardized Vagrant dev box, providing
conveniences customized to our team’s needs: access to company VPN & MySQL instances hosted on
RDS, and auto-configured Xdebug; reduced new developer set-up time from 1-3 days to <1 hr
Education & Miscellanies
• Education: Honours Bachelor of Science, University of Waterloo, 2015
• Linux Certifications: LFCS 2023 (ID: LF-bo5o53tk7z), RHCSA 2017 (ID:-)
• Hobbies: reading, chess, calisthenics, traveling
