Aaron Pfeifer Email & Phone Number

Boston, Ma, Us

San Francisco, California, Us

Provided leadership, architecture direction, and core code contributions across the engineering organization. Helped drive major engineering initiatives, including:• A data / reporting API built in GraphQL for internal and external customers• Migrated reporting pipeline from Postgresql to Memsql to support more advanced reporting• Supported the integration of products / tech from Tapjoy's acquisition of Tapdaq• Unified data lake design across the organization• ...in addition to many other smaller initiativesAlso drove multiple initiatives within the organization, including:• Working Groups to improve organizational quality• Product & Tech 360 Review processAll systems were built primarily with Ruby and deployed onto a large-scale system. Technology focuses: Ruby, Rails, Scala, MemSQL, Chef, AWS

San Francisco, California, Us

Helped drive major engineering initiatives, including:• A job processing system built on SQS• A mobile device identification / management system• A real-time reporting pipeline built on Spark, Kafka, Zookeeper, and Postgresql (5B messages / day)• An A/B experiments framework• Playable ad creative experiences• Open-sourced multiple projects, including a team conferencing system and various testing toolsAlso drove multiple initiatives within the organization, including:• The Tapjoy Engineering website• An advisory council for data architecture• Guides for data modeling, data storage, cod reviews, and others• Technical blog post for real-time dedupe at scale• Professional Development skill matrix for IC careersManaged and mentored a small team across multiple offices within the architecture group. Additionally provided technical mentoring and guidance across the entire engineering organization. Responsibilities included 1:1s, quarterly reviews, annual / quarterly goal setting, and recruiting / interviewing.All systems were built primarily with Ruby and deployed onto a large-scale system. Technology focuses included: Ruby, Rails, Scala, Javascript, Chef, Postgresql, Spark, Kafka, Zookeeper, AWS

San Francisco, California, Us

Provided technical leadership, guidance, and project management for a team within the architecture group. Helped drive major engineering initiatives, including:• A monitoring system / dashboard built on Sensu• An analytics data pipeline built on RabbitMQ• Published engineering blog posts and presented to RailsConf 2013 on monitoring systemManagement responsibilities included 1:1s, quarterly reviews, annual / quarterly goal setting, and recruiting / interviewing.Technology focuses: Ruby, Rails, Chef, AWS

Cambridge, Ma, Us

Helped lead the development of several large-scale Ruby- / Rails-based web applications. Acqui-hired by Tapjoy in July 2012.Technology focuses included: Javascript, Ruby, Rails, Chef• Helped build a web-based community portal for digital goods creators• Designed and built a Javascript framework for embedding widgets / distributing social games on third-party social networks• Built an automated distributed load test library using Tsung

Cambridge, Ma, Us

Provided design and engineering resources for contract work.• Designed and built the website for private investment firm Stonepath Capital Partners

Co-founded as part of a collegiate honors program project in 2006. Open-sourced much of the work that came out of the engineering effort.• Built a web-based marketplace in Ruby on Rails for buying, selling, and sharing information• Built the website for Altruistiq and the Altruistiq Exchange

Jacksonville, Florida, Us

Completed a 6 month co-op as part of a co-op requirement at the Rochester Institute of Technology. Primary developed desktop C# applications in support of the company's domain registration service.• Built a distributed system to replace legacy Whois image capture software, including a(n):- Framework for monitoring and maintaining the internal health of an application and its environment- Workflow framework to dynamically configure the flow of data through the system- Image generation and statistics engine for displaying information on public Whois domain lookups

Completed a 6 month co-op as part of a co-op requirement at the Rochester Institute of Technology. Primarily developed desktop C# applications in support of of the company's data entry workflow suite.• Added improvements to an internal web-based timesheet application in ASP .NET• Built algorithms for detecting patterns in OCR scans• Built a document design application for information capture