Project: Office 365 Data Analytics- Designed and deployed a custom data analytics solution for Office, running modified versions Apache YARN, Apache Hive, and Apache TEZ across tens of thousands of physical machines (under a custom control plane)- Provided solution design oversight for a large team of developers on wide-ranging topics including overall architecture, scalability, security, and compliance- Drove a variety of infrastructure alignment discussions between Office and Azure.

Project: Windows Live Service Excellence- Drove small development team (within the context of the overall management system I helped to architect), with a specific focus on service availability and safety in the context of deployment, monitoring, and repair activity for large scale stateful systems (Outlook.com, OneDrive.com)- Continued to support the broader team's efforts (design, live site support, etc.) for all system-managed Windows Services properties, including Windows App Store, Microsoft Account, etc..

Project: Windows Live Service Excellence• Drove architecture for Windows Live Automated Deployment, Monitoring, and Repair System• Reviewed and shaped designs across a geographically distributed team of 20+ developers, with associated test and program management resources• Advised internal teams on a wide range of issues, from low-level adoption details to large scale design and architecture regarding system resiliency in the face of failure.• Status: Instances of the system now control thousands of stateless front-end and backend database servers across multiple data centers in support of a number of well-known user-facing systems.

Projects: - Windows Azure - Cloud Storage Backend (Code-Named Niobe)• Drafted an initial architecture of Azure Queue Service, before volunteering to join a re-forming small team focusing on maintaining and improving Niobe (Massively scaled storage system behind Spaces/Mesh/VirtualEarth/etc, PBs of Storage, hundreds of millions of users)• Focused on enhancing Niobe resiliency in the face of ongoing HW fault issues• Functioned as the primary maintainer not only of the Paxos-based replication-tracking state machine, but also the primary Niobe transactional, replicated custom data storage node, and a number of other components in the system.• On-call for live site support escalations from System Engineering

Project: Cloud Storage Backend (Code-Named Niobe)• Primary implementer/maintainer of replication-tracking state machine, responsible for ensuring cluster-wide data replication safety and consistency [written atop internal Paxos implementation]• Design participant, primary author/maintainer of per-cluster SOAP front-end for requesting replication state changes, including a Lock Manager paradigm to protect data replication in maintenance/deployment scenarios• Participated in the design of extensions to and dynamic configuration of client-side performance counter aggregation and collection (Patent Pending)• Lead a V-team of two to design and build a nightly performance testing and reporting infrastructure, including a performance test client.• Consulted on design questions across the team, not only within the Storage, but also within the Niobe automatic management/repair sphere.• Served as lead-level “Ninja” for development manager, filling gaps, driving initiatives as necessary.• On-call for live site support escalations from System Engineering

Project: Hotmail Windows Backend Storage• Lead a team of 5 responsible for maintaining the Hotmail Backend Storage System, including o All incoming e-mail storage o User-facing front-end protocol layer. o DB/CIFS storage o Garbage collection tooling o Outlook connector backend sync infrastructure• Primary on-call point of developer-side live site escalation for storage system which received billions of emails/day, stored data for hundreds of millions of users, • Personally provided support for legacy UNIX backend• Drove original implementation of large scale client-side performance aggregation and collection system (Patent Pending)

Projects: - Hotmail Unix Backend Storage - Hotmail Windows Backend Storage • Designed and implemented custom SMTP extension for MS SMTP -> Backend communication• Implemented protocol head and Windows/Unix cross compiling abstraction for asynchronous data handling with callbacks [Windows – IOCP, Solaris 2.6 - custom thread-pool/IOCP implementation based on non-blocking sockets and poll())• Updated code-base for an update to a newer Sun complier (including C99 compliance)• Used genetic algorithm to evolve perfect hash function for efficient in-memory data structure.• Implemented server-side code to match incoming e-mail against keywords, which involved compile time NDFA construction followed by a NFA->DFA conversion and DFA minimization• Continued to maintain portions of the incoming e-mail pipeline after the migration from UNIX to Windows/SQL, including DB development, etc.• Implemented queuing layer to protect individual UNIX LUNs/Windows DBs from being overwhelmed by any one server process, particularly in the event of disk/DB failure• Implemented (small) portions of the very first Hotmail Outlook Connector web-facing frontend