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Loren Siebert

VP of Engineering at Paradigm

Mill Valley, California

Overview 

Loren Siebert is currently the VP of Engineering at Paradigm in Mill Valley, California, with a strong background in software systems and team leadership. His career highlights include leading engineering teams at Paradigm and investing in early-stage companies in sectors like Data Services and AI.

Work Experience 

  • Personal Sabbatical

    2025 - Current

    Giving myself some time and space to reflect on how I want to shape the next chapter—whether that's building, advising, leading, or something totally unexpected. Excited to focus on personal growth, family, travel, and exploration of new ideas.

  • VP of Engineering

    2024 - 2025

    - recreated the entire Engineering function from scratch, hiring senior developers and building a culture of high trust, low ego, and top performance. - balanced long-term thinking with short term pragmatism: ship fast while keeping Future Us in mind. - remained a hands-on engineering leader throughout: writing code, reviewing PRs, and troubleshooting alerts alongside my team. - built initial GenAI agent prototypes leveraging semantic search, reciprocal rank fusion, and retrieval augmented generation.

  • Head of Engineering

    2023 - 2024

  • Senior Software Engineer

    2022 - 2023

Paradigm is a research-driven crypto investment firm that funds companies and protocols from their earliest stages

  • Venture Partner

    2015 - 2022

    Technical advisor helping entrepreneurs at outstanding software companies execute private stock transactions.

Akkadian Ventures is a direct secondary investment firm that offers liquidity to early employees and investors of venture-backed businesses.

  • Data Engineer

    2020 - 2022

    Created comprehensive Python/SQL ETL system to ingest hundreds of versioned data shapes from dozens of Kafka publishers into seven Snowflake data warehouses. Scaled to billions of events daily.

Citadel Securities is a next-generation capital markets firm delivering critical liquidity and helping to shape the markets of tomorrow.

Raised $1,150,000,000.00 from Paradigm and Sequoia Capital.

  • Software Engineer

    2018 - 2020

    Built out several multi-TB Elasticsearch clusters to support Arabic/English/Chinese-language ML products for data science team. Wrote all initial code for a data pipeline based on S3/SNS/SQS.

Primer develops a text analytics solution designed to automate the analysis of textual data.

Raised $237,049,995.00 from Angel Collective Opportunity Fund, Addition and US Innovative Technology Fund.

  • Software Engineer

    2016 - 2018

    Built first DC/OS framework on Elastic Stack using DC/OS Commons library. Helped identify requirements and troubleshoot issues with both the underlying library and the test suite.

DMI is a full-service commercial real estate syndication, management, construction, and brokerage firm that truly cares about delivering.

  • Founder

    2007 - 2016

    Created language learning service that works in conjunction with existing collage and US Army Special Forces curricula. Salon.com: http://bit.ly/PxSYkf. SFChronicle front page: http://bit.ly/MVwGDu

  • Search/Analytics Architect

    2009 - 2015

    Built search/analytics solution for federal/state government agencies (e.g., usa.gov, whitehouse.gov, noaa.gov, nps.gov) that offer search to site visitors.

FEDSIM delivers innovative solutions to the most challenging acquisitions.

  • Lecturer, Arabic Language

    2006 - 2007

    Teaching Modern Standard Arabic

  • Engineering Intern

    1988 - 1992

    Held multiple software development positions in different groups within the Agency, primarily in SigInt organizations. Held TS/SCI clearance with full scope polygraph.

Defending Our Nation. Securing The Future.

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