Wei Dai

Markham, Ontario, Canada

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Summary

🤩

Rockstar

🎓

Top School

Wei Dai is a data analytics leader with 11 years of experience applying statistics, causal inference, and machine learning to drive measurable business impact across tech, insurance, retail, and manufacturing. He has delivered multimillion-dollar uplifts—such as a $14M quarterly revenue gain at TikTok—and cut key operational metrics like ticket resolution time and workforce reporting latency by over 30%. Equally comfortable with hands-on engineering, Wei has contributed to prominent open-source C++ projects (notably Microsoft SEAL and vcpkg), improving encryption evaluator logic and packaging for broader adoption. He combines rigorous experimental design (CUPED, survival analysis) with production-grade data engineering (Airflow, scalable pipelines), enabling data-driven workforce and marketing strategies. A Dalhousie-trained statistician, he also mentors analytics teams and builds predictive frameworks that consistently boost acquisition, retention, and revenue. Based in Markham, Ontario, Wei blends deep quantitative expertise with pragmatic engineering to turn complex data into operational advantage.

10 years of coding experience

2 years of employment as a software developer

Master's degree, Statistics, Master's degree, Statistics at Dalhousie University

English, Chinese

Github Skills (21)

c-language10

lib10

cmake10

package-manager-tool10

cryptography10

vcpkg10

package-manager10

cpp10

cprogramming-language10

homomorphic-encryption10

api-design9

apim9

algorithms9

automation-testing9

automation9

Programming languages (6)

C#C++CBicepCMakeCuda

Github contributions (5)

microsoft/SEAL

Jan 2019 - Dec 2022

Microsoft SEAL is an easy-to-use and powerful homomorphic encryption library.

Role in this project:

Back-end Developer

Contributions:11 releases, 9 reviews, 635 commits in 3 years 11 months

Contributions summary:Wei primarily worked on the Microsoft SEAL library, specifically within the src/seal/evaluator.cpp file. Their contributions focused on enhancing existing functionalities and addressing code efficiency and correctness. The user added optional checks within the Evaluator class to ensure output ciphertexts do not contain zero coefficients. They also made changes to improve BFV and CKKS encryption handling in several methods.

encryption-librarymicrosoftfhesecurersa

microsoft/vcpkg

Sep 2020 - Jan 2023

C++ Library Manager for Windows, Linux, and MacOS

Role in this project:

Back-end Developer & DevOps Engineer

Contributions:19 reviews, 15 commits, 16 PRs in 2 years 4 months

Contributions summary:Wei primarily contributed to the vcpkg package manager by updating and fixing ports for C++ libraries, particularly focusing on the SEAL library. Their contributions involved modifying portfiles, CMake scripts, and patching code to integrate and build these libraries correctly within the vcpkg environment. They also participated in updating the versions of the dependencies and made changes related to the automation, packaging, and distribution of C++ libraries.

c-plus-plussetuptoolspackage-managermacoscplusplus

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