Darren Lee

Software engineer

San Francisco Bay Area

About

Experience

  • Software Engineer at Meta
    Dec 2025 - Present · 7 mos

  • LinkedIn (11 yrs 4 mos)
    • Principal Staff Software Engineer
      Sep 2021 - Nov 2025 · 4 yrs 3 mos

      Technical lead for the LinkedIn marketing solutions team. My mission is to "help the team win." Some ways that this has manifested are: * Prototyping and early implementation of new features on the marketing platform, including streamlined campaign creation, data acquisition, and agentic capabilities. * Maintaining code and service health, especially with respect to integrations with Microsoft services. * Compliance with regulatory requirements (GDPR, DMA) and industry standards (MRC). * Development and oversight of our design review process. * Review of API design, schemas, and other data modeling concerns across the company. * Talent development, especially around mentorship, evaluation criteria, and our promotion process.

    • Senior Staff Software Engineer
      May 2016 - Sep 2021 · 5 yrs 5 mos

    • Staff Software Engineer
      Nov 2014 - May 2016 · 1 yr 7 mos

  • Bizo, Inc. (acquired by LinkedIn) (San Francisco Bay Area)
    • Senior Quantitative Engineer
      Jan 2011 - Aug 2014 · 3 yrs 8 mos

      Led a 3-engineer team responsible for segmenting users into business demographic segments, including onboarding, normalizing, and productionalizing data about individuals, companies, and IP addresses. Redesigned the user segmentation data pipeline so consuming systems could benefit from new features and data quality improvements. Responsible for monitoring and improving the quality of our classifications. Member of a 3-person ad optimization team that built and evaluated algorithms for improving conversion rates on display campaigns. Our responsibility included building out systems to add more data to our ad serving platform, writing and maintaining an A/B testing framework, designing new algorithms, and conducting experiments to measure their effectiveness. Primary author of our engineering culture guide at http://dev.bizo.com/culture/.

    • Quantitative Engineer
      Feb 2009 - Dec 2010 · 1 yr 11 mos

      Primary developer for the data collection and classification systems. Redesigned and refactored the existing classification system to add parallelism and enable us to easily modify our classification pipeline. Maintained and operated these systems in production. Created a title classifier to segment users by job function and seniority. Used Mechanical Turk and Crowdflower to crowdsource a ground truth set, then used both Bayesian and heuristic rules to extend the coverage of the classifier to the full set of inputs.