Service Manager
Resume:
Gabriel Popescu
Resume
Redmond, WA
**********************@*******.***
www.linkedin.com/in/gabriel-popescu-885266124
Objective: I am looking to make a difference in people’s life, to be passionate about it, with opportunities for career growth, where I can apply my knowledge, experience, and skills, and develop new ones.
Analytical achiever with facilitator traits, excellent architecting, and software development skills using C, C++, and C#. Experience working with Exchange storage solution, Azure services, modeling and simulation of circuits, and system, hardware description languages, simulation technology, SaberHDL, VHDL-AMS/MAST.
Professional Experience
My focus at Microsoft has been repositioning Microsoft Exchange Server from enterprise service to the cloud. It became the anchor service in Office 365.
2014 – 2016, Senior SDE, Microsoft Corp. O365 Core Foundations, working on Hercules platform (HRC), and Assisted Onboarding projects.
Selected accomplishments:
Simple MRS creating the infrastructure to implement user friendly solution for onboarding/offboarding operations perceived by customers as one of the most painful experiences during O365 onboarding.
Enable Bing to leverage Office 365 customer base by defining and evolving RESTful Bing Places Partners API for Office 365 to stage deliverables in a very tight schedule.
Migration Notification Service enabling Office 365 applications and service to respond on Migration Service events.
HRC Data Canonical Representation, data protocol to decouple the server/client data types enabling independent server client development using HRC RESTful API. Worked with my team as well as other teams to validate the concept, test constraints, guidelines, and adoption.
Distributed Azure storage solution for HRC platform to satisfy Governance, Risk Management and Compliance (GRC), improve service availability, scalability and performance. Drove O365 Trust & Protect review as part of compliance review process.
Enabled safe onboarding of self-signed certificate Exchange using tenants, as an alternative to acquiring and installing valid certificates for the one-time onboarding process, by releasing a Migration Proxy Service. Managed a virtual team leveraging the expertise of people across the organization, drove the O365 Trust & Protect review.
Migration Provider component, abstracting the entire Migration Workflow in Mailbox Replication Service (MRS) functionality for Assisted Onboarding projects.
2007 – 2014, Senior SDE, Microsoft Corp. in Microsoft Exchange Server, Office 365, Mailbox Intelligence team working on projects on Store, Time Based Assistants (TBA), and Work Load Manager (WLM). I have been working with Mailbox Replication Service (MRS), High Availability (HA), and Transport teams on projects involving cross component specific interaction. Provided guidance on subjects related to my work. Performed on call service for Store, WLM, TBA, with the required security clearances.
Selected accomplishments:
Improved scalability, and reliability of database management in E14 Store in the context of a highly sensitive, mission critical, legacy component, by architecting a solution with the necessary set of constraints, eliminating previously pervasive quality issues. Planned and executed a set of over 40 subsequent code changes over four months, minimizing risk by leveraging existing test and deployment infrastructure. Among others this solution enabled the development of the HA solution in Exchange.
Redesigned the Exchange VSS Writer for Exchange 14, and again for Exchange 15. Designed and implemented the distributed controller and admin APIs in the new Exchange 15 distributed Store Worker architecture achieving point to point compatibility to minimize requestor impact, and expanded the previously limited Exchange out of the box scenario support eliminating the need for one off customizations and related support calls.
Designed, and implemented the distributed Exchange Fault Injection (FI) API and solution initially for native code Store, and immediately adopted for Content Indexing (CI). Soon the solution was adopted by all Exchange teams and enabled verification of scenarios in complex systems deployed in a test environment. I have been overseeing the development of new FI features through continuous effort of virtual teams over time.
Positioned Exchange 14 for Datacenter operations, eliminating specific scenario sensitivity to DOS attacks, by decoupling the mailboxes storage concepts. Reduced risk of massive changes in a fast-paced tight schedule by planning and executing this work with a team of three developers over almost six months, using a significant number of incremental changes continuous testing and deployment of intermediate stages.
Store Usage Statistics, an extensible diagnostics and monitoring feature under very strong memory, and CPU constraints, delivers accurate representation of resource usage for the top mailboxes on the system, the central piece for Store health monitoring, and throttling.
Architected a very flexible, risk minimizing, per mailbox cache system very close to the release of Exchange 14 which allowed per server Store memory usage control, and enabled agile development of related features.
Enabled O365 data mobility by eliminating the need to restart MAPI clients after mailbox moves. Defined the Mailbox Signature representing the equivalence criteria for mailboxes as far as a client is concerned. Planned and implemented an evolving solution including APIs and protocols to achieve a good balance between risk, and released functionality, which I have been augmented in stages since 2009 as the system changed and more requirements needed to be satisfied. This feature enabled load balancing by mailbox migration in Datacenter.
Defined the mailbox shape concept, and the interaction with MRS for MRS specific scenarios, eliminating DOS attack vectors delivered on Store performance limitation on large data sets. This was achieved by identifying and limiting mailbox dimensions such a number of messages per folder, folder depth hierarchy, and many others, without affecting performance.
Defined the development plans for Work Load Manager (WLM), and Time Based Assistants (TBA) infrastructure once they were identified as limiting for the Mailbox Intelligence projects.
Designed and implemented test/monitoring/logging/reporting for WLM/TBA Infrastructure in the effort of bringing them to the required Datacenter.
2004 – 2007, SDE / SDE II in Exchange, Exchange Customer Experience team working on internal and customer specific requests for all flavors of Exchange Server, interacting with all Exchange teams, with emphasis on Store. Contributed to improving customer experience with Exchange by designing and implementing solutions for fixing and enhancing the functionality of Exchange Server, and related tools.
Selected accomplishments:
Improved the release process efficiency by developing memory leak identification strategy.
Key contributions to the development of Process Flow Document (PFD) tracing with significant impact in determining the starting point for the defect investigation.
Investigated and fixed reported problems for Exchange 5.5, Platinum and Titanium.
Designed and implemented functionality enhancements requested by customers.
Developed an Exchange Server specific defect pattern documentation containing identified significant defect patterns in Exchange code base, Exchange specific implementation patterns, and their risk implications.
Improved the development, and test process by defining the precursor of rollup resulting in significant test cost reduction, and improved test quality. Proved the concept on a contingent of code changes.
Published several papers on mixed signal, multi technology, and multilingual simulation environments outside the scope of Exchange related work.
2002 – 2004, R&D Engineer, Senior II, Synopsys, Inc. through Avant!, Inc. acquisition
2001 – 2002, Software Engineer, Avant!, Inc., working on Saber HDL / Saber line of mixed signal, multi domain simulation environments, primarily on the simulation engine (runtime), elaborator, and occasionally compilers, designing and implementing analog, digital, and mixed signal simulator features, MAST, and VHDL-AMS language features in the simulation engine, and elaborator, as well as simulation environment specific scenarios.
Selected accomplishments:
Reduced elaboration time and memory usage of simulatable model, more than one order of magnitude by redesigning elaboration algorithms and simulatable model data structures to share portions of the elaborated models.
Increased simulation speed reducing run time: up to 20%, for designs containing nonlinear analog models by reorganizing simulatable model data structures with impact on analog simulation algorithms; up to 50% for some cases of interest - true HSPICE models - by changing particular aspects of foreign functions support.
DC transfer functionality. Abstract, and unified support for predefined range sampling definitions used for all applicable simulation scenarios, and analysis models.
Defined, designed, and implemented multilingual support in simulation engine, and elaborator for VHDL-AMS and MAST, delivering the first solution for hardware description multilingual simulation support.
Contributed to the first release of Cosmos Scope by performance analysis, tuning, and fixed Advanced Waveform Database (AWD).
Defined strategy for systematic performance analysis using Rational Software Quantify for Saber HDL.
Supported existing code, fixing and enhancing functionality. Analyzed and fixed several critical problems in simulation engine, elaborator and VHDL-AMS compiler increasing quality and reliability of the product.
Increased maintainability of test system to better support analog and mixed signal functional and regression tests.
1998 – 2001, Associate Professor, Technical University of Iasi, Department of Electronics and Telecommunications.
1996 – 1998 Assistant Professor, Technical University of Iasi, Department of Electronics and Telecommunications.
1994 - 1996 Lecturer. Technical University of Iasi, Department of Electronics and Telecommunications.
Software engineering, and EECS. Improved and taught existing courses. Introduced and taught new courses. Developed a research team of 5 former students which I hired and managed during the completion of several research projects.
Courses taught:
Computer aided design of electronic circuits and systems (hardware description, modeling methodologies, simulation algorithms, SPICE, VHDL)
Object oriented programming (object oriented modeling and programming, generic programming, C++)
Software tools for microelectronics (hardware description for simulation and synthesis, modeling methodologies, simulation algorithms, SPICE, VHDL)
Telecommunications Management (OSI model, object oriented modeling and programming)
Other academic activities:
Invited Assistant Professor, National Technical University of Athena, Greece (May 1998 and May 1999), as part of Erasmus - European university exchange program.
Associate Professor, courtesy of the Medicine and Pharmacology University of Iasi, Department of Bioengineering, Iasi, Romania (1999-2001)
Research:
Directed research program funded by Romanian National Agency for Science and Innovation, on theme involving the development of interconnections modeling techniques for discrete event simulation, with particular applications in VHDL verification of digital circuits taking into account major analog behavior aspects.
Developed quasi constant complexity algorithm for optical propagation models for project involving definition, design and implementation of modeling and simulation strategy for evaluation of electromagnetic field distribution for mobile communications in outdoor urban environments, and for indoor environments.
Completed several projects involving modeling and simulation of electronic circuits and systems. Developed simulation algorithms and simulatable model generation for analog and discrete event simulation as well as solver specific modeling methodologies.
Piecewise linear (PWL) modeling and simulation of electronic circuits and systems. Developed simulation algorithms for time domain analysis.
Education Ph.D. EECS, 1993 - 1998, Technical University of Iasi, Thesis title: Contributions to Macro-modeling and Simulation of VLSI Circuits
BSEE/MSEE Degree in Electronics and Telecommunications, major in Radio Communications, 1988 - 1993, Technical University of Iasi, Thesis title: Time Domain Simulation of Piecewise Linear Modeled Circuits
Over 35 technical papers published, 1 book.
IEEE member: CAS and SSC Societies, had been serving as reviewer for CAS society publications.
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