Tianjia Zhang
CEO at JollyToday
Hong Kong, China
Summary
🤩
Rockstar🎓
Top SchoolTianjia Zhang is a tech entrepreneur and CEO with 11 years of experience building AI-driven video marketing and automation products, having founded JollyToday in 2019 to scale intelligent video editing and social media operations for millions of users and hundreds of top brands. He blends a strong engineering background—rooted in an optics degree from Fudan University—with practical fintech and infrastructure experience from a VP role at WEXFIN, giving him rare cross-domain fluency in AI, payments, and automation. Under his leadership JollyToday applies big data, RPA, and machine learning to products like GhostCut and DozyCat, turning trend discovery into actionable creative workflows. Tianjia also contributes to security-sensitive open source work, notably enhancing OpenSSL with features such as KTLS support and SM4 GCM/CCM integration, signaling hands-on competence in cryptography and backend reliability. He favors pragmatic, data-first product design and teams drawn from leading Chinese internet firms, combining strategic vision with engineering rigor. An understated strength is his ability to translate low-level protocol and security fixes into product trust that scales across enterprise and creator customers.
11 years of coding experience
Bachelor's degree, Optics/Optical Sciences, Bachelor's degree, Optics/Optical Sciences at Fudan University
Github Skills (20)
m410
tls1210
smp10
smo10
smb10
tls1310
crypt10
smf10
smd10
mtls10
openssl10
cryptography10
libtls10
encryption10
smt10
Programming languages (12)
Github contributions (5)
openssl/openssl
Mar 2020 - Dec 2021
TLS/SSL and crypto library
Role in this project:
Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:12 reviews, 21 commits, 43 PRs in 1 year 9 months
Contributions summary:Tianjia primarily contributed to the OpenSSL library, focusing on enhancements and bug fixes. Their work included adding new features such as a KTLS option for `s_server` and `s_client`, and integrating SM4 GCM and CCM implementations. They also addressed issues related to SM2 key management and corrected a bug in the `ciphers` command, while also improving the return path. Additionally, they made code style improvements by using functions instead of direct structure field references, and added OIDs for SM4 GCM/CCM.
crypto-librarycryptographyssltlscrypto
uudiin/luv
Jan 2018 - May 2024
Bare libuv bindings for lua
Contributions:2 pushes, 1 branch in 6 years 5 months
lualibuvbareluajit
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