Loren Siebert is a seasoned engineering leader with 16 years building and scaling production systems, most recently rebuilding Paradigm’s engineering organization and shipping early GenAI agent prototypes. He blends hands-on software craft—writing code, reviewing PRs, and troubleshooting alerts—with strategic hiring and culture design that emphasizes high trust and low ego. Loren’s background spans high-throughput data engineering at Citadel Securities, multi-TB search and ML infrastructure at Primer.ai, and founding a language-learning startup that reached mainstream press. He pairs deep technical skills in distributed systems, search, and ETL with experience advising startups on private secondary transactions as a venture partner. Based in Mill Valley, he’s currently on a personal sabbatical focused on family, travel, and reflection about his next technical or leadership chapter. An early-career TS/SCI clearance and teaching Arabic at UC Berkeley hint at an unusually broad mixture of technical, linguistic, and mission-driven experience.
16 years of coding experience
21 years of employment as a software developer
MSc Computer Science, MSc Computer Science at The University of Manchester
Contributions:7 PRs, 8 pushes, 9 branches in 3 years 9 months
to-jsonrsspythonleadsjson-to-html
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.