Andy Ullman Email & Phone Number

Houston, Tx, Us

- Lead a distributed organization of 50 professionals, encompassing software engineering, data science, RF engineering, analytics, and product management teams.- Drive innovation in geospatial analytics, data science, and remote sensing to optimize tower inventory, predict future demand, and create new revenue opportunities.- Oversee development of the company's Atlas (Lightning) network planning tool, utilizing advanced geospatial algorithms for network expansion modeling.- Spearhead machine learning projects, including lifetime asset valuation models and tower demand/supply models, harnessing geographic data to support business strategy.

San Francisco, Ca, Us

- Built and scaled Twitter’s User Signals organization, with a focus on geolocation, user embeddings, and trust and safety—achieving a 2.5% revenue increase and 750K user growth.- Led Geo Atlas, a deep learning model that reduced user location error by 65%, powering ad targeting and recommendation systems.- Partnered with research to develop TwHIN, Twitter’s graph-based user embedding system, used to improve content and ad recommendations by embedding the social graph.- Partnered with Trust & Safety to enhance Agatha, Twitter’s primary trust and safety platform, achieving 10x performance improvements for near real-time monitoring.- Increased ad revenue by $40M through strategic improvements to geolocation and ad-targeting pipelines and optimized system integrations.

Boston, Ma, Us

- Grew a new engineering team of 25, partnering with data science on pricing, forecasting, and promotions for Wayfair’s extensive product catalog.- Enhanced Wayfair’s pricing engine, adding competitor-driven demand models and a market similarity model that supported better price positioning.- Developed critical infrastructure, including a feature store and A/B testing framework, improving efficiency and model deployment for data scientists.- Led impactful projects like the true market value estimation and badge optimization, helping Wayfair optimize demand forecasting and pricing decisions.- Spearheaded the adoption of Spark and big data infrastructure, enabling scalable, data-driven strategies

Boston, Ma, Us

Led multiple teams to build custom trading and portfolio management systems. Innovative leadership of hybrid teams consisting of software developers, quants, and equity data specialists. Played a lead role helping the firm move to big data technologies. Tech stack includes C#, ms sql, hadoop/spark, and python.

Boston, Massachusetts, Us

Responsible for a custom portfolio management and trading system, used by GMO’s partners and senior portfolio managers.

Boston, Ma, Us

Business development and technical leadership for IMP's technical practice. Individual contributor and project manager for front-office technology projects, including order management system upgrades and implementations.

Burlington, Ma, Us

Boston, Ma, Us

Master'S Degree, Computer Science - Machine Learning

Mba, Finance

Bs, Math/Computer Science