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Francislav Penov


Software Engineer at Facebook

Greater Seattle Area

Section title

Francislav Penov's Email Addresses & Phone Numbers

Francislav Penov's Work Experience


Greater Seattle Area


Software Engineer

Greater Seattle Area

Software Development Engineer

January 2011 to June 2012

Greater Seattle Area

Francislav Penov's Education

Sofia University St. Kliment Ohridski

Computer Science

1991 to 1994

About Francislav Penov's Current Company

Technical evaluation of investment opportunities.

About Francislav Penov

📖 Summary

Advisor @ Technical evaluation of investment opportunities. Greater Seattle AreaSoftware Engineer @ Facebook Platform and technologies: C, Arduino, Java, Objective-C, Node.js, JavaScript, PHP/Hack, Bluetooth, mDNS, iOS/Apple TV, Android, Linux, various low-level hardware platforms and protocols (Connexant, Raspberry Pi, Intel Atom, I2C, I2S, Arduino, Intel Edison, Texas Instruments)* Messenger - Conversational Understanding.* New Technology Team @ FacebookUnreleased project - Technical lead for the overall project - overall design, pipeline architecture, hardware platform selection, individual features implementation. Technical management of contractor team - scope of work, requirements, advising, code reviews, etc. Responsible for project transfer to Building 8 org within Facebook. Member of the Building 8 initial dev team.Smart Login - overall architecture, Facebook Android and iOS SDK integration, Facebook iOS app integration.Parse for IoT - Technical lead for the overall project - overall architecture, API design, v1 platforms selection, developing of RTOS SDK. Technical management of the AnyDevice sample app contractor project.* Connectivity Lab @ FacebookPrototyping peer-to-peer based technologies for sharing data based on Wifi Direct and Bluetooth.Technical evaluation on new standards proposals from industry partners.* Facebook for AndroidDirect updates - overall design of the feature. Implementation of the client side UX, and the server side object and query model.Beta program - initial investigation of Google Play alpha and beta channels. Implementation of the megaphones to prompt users. Overall engineering support for the program.Upgrade rates - Lead the overall effort for improving the upgrade rates for the application. Implementation of permissions test bench and the process for testing of upcoming releases. Data analysis to understand better the various reasons users do not upgrade.* Undisclosed productImplementation of an OS-level feature and integration of a third-party component. Greater Seattle AreaSoftware Development Engineer @ * Fire PhoneMember of several cross-group collaboration efforts around code-sharing, and SDK/API unification.Engineering infrastructure planning and design advisory role.Development environment and enlistment scripts. Initial version of the core test automation script.“To go” expert on Android and AOSP build system.Specific product features (in addition to the common infrastructure) worked on include:- FireflyPrototyping and proof of concept for new user scenarios. Client architecture of the main processing engine. Initial design for the API and third-party SDK integration.- Dynamic Perspective.Prototyping and proof of concept for several controls. Initial design for the API. Initial design and implementation of the integration of standard Android views into the Dynamic Perspective visual tree.- OthersDesign advisory and reviews for applications and OS components delivered by several other sprint teams (Games, Maps).Component design of several other application and OS level features, like metrics collection, unified communication channel, etc.Technologies: Java, C++, Android, Android Open Source Platform, Linux6 invention applications filed.Mentoring junior members of the team.Actively involved in the recruiting process, with 220 phone screen and in-house interviews, member of the Amazon “bar raiser” program. From January 2011 to June 2012 (1 year 6 months) Greater Seattle AreaSoftware Design Engineer @ Microsoft Corporation Design of the initial process and component architecture of the Live synchronization handler for Windows 8 settings.Technologies: Win32, C++Windows Live Suite ( - responsible for the extensions to the Internet Explorer for several products, user elevation process, cross-process communication. Design and implementation of the base services architecture. Integration with Windows Live Sign-In, Windows Live Communication Platform and other Live services and components. Design and implementation of the instrumentation and performance services. Closely working with the Windows performance team to measure and improve the performance of the products and the impact on Internet Explorer.Specific product features (in addition to the common infrastructure) worked on include: - Messenger CompanionInitial design and architecture for SOXE - Social Object eXtractor Engine Design - a component for discovery and extraction of structured data from unstructured web pages. Design and implementation of Companion notifications service. - Windows Live ToolbarDesign and implementation of Favorites Sync service state machine. Integration with Microsoft Search Enhancement Pack.Technologies: Win32, C++, COM/DCOM, ATL, XML, RESTDesign and development of cross-process scripting infrastructure for Microsoft Codename Max ( Development of Max UI in WPF. Focusing on accessibility and glob/loc issues in the UI. Owner of the UI integration with Vista Aero ("Glass").Technologies: Win32, .Net 2.0, .Net 3.0/WPF ("Avalon"), COM, .NET Remoting, C#, C++ From January 2006 to January 2011 (5 years 1 month) Greater Seattle AreaSoftware Design Engineer in Test @ Microsoft Corporation XML Web Services/Windows Communication Foundation (.Net 3.0 WS-* stack, aka “Indigo”) - test owner of: Configuration, MB Dump, MB Spy, MB Trace. Security threat modeling for WCF Management features. Lead virtual team for localization/globalization testing efforts for COM+, MSMQ, System.EnterpriseServices/System.Net/System.Transactions/System.ServiceModel namespaces in .Net 2.0 and .Net 3.0. Design and development of TEF - internal test harness for developing automated tests, used by the test automation for WCF and COM+. Technologies: C++, C#, COM/COM+, Win32, .Net 2.0, .Net 3.0/WCF ("Indigo"), XML, web services.COM+ - test owner of: Loosely-coupled events (LCE), Services Without Components (SWC) and Partitions Import/Export/Admin. Part of COM+ stress triage/investigation team, investigating and debugging failures in COM/COM+ nightly stress runs. Part of the Sasser virus response team.Technologies: C++, COM/COM+, Win32 From April 2001 to January 2006 (4 years 10 months) Greater Seattle AreaSoftware Engineer @ WebMessenger Developer - Bravo Endeavor ( Development of real-time data visualization UI. Development of a sound "visualization" subsystem. Worked with the customer on the requirements and initial design of thin client for a real-time remote monitoring.Architect/lead developer - internal prototype of an IM server. Supervised teams in China and Bulgaria offices. Design of the server architecture and the wire protocol. Development of lightweight XML parser for RIM platform. Development of Jabber gateway.Lead Developer - Orientation Xpress (client for Jabber IM server). Design and implementation of XML object serializing/deserializing. Development of UI and integrating of a skin engine. Development of Jabber Agents (automated IM clients delivering real-time content - news/weather information/stocks). Design of the agents communication protocol.Technologies: C++, signal processing, Win32, MFC, ATL, XML, RIM From February 1999 to March 2001 (2 years 2 months) Greater Los Angeles AreaSoftware Engineer @ Code Assistance Developer - ProPricer, ( - a comprehensive package for financial forecasting and analysis with over 350,000 lines of code). Design and implementation of pluggable custom business logic. Development of data access layer. Implemented various user interface parts and custom controls. Lead team of 3 developing customized version of ProPricer. UI development in two supplementary products _____ILLEGAL_CHAR_SSSTART150ILLEGAL_CHAR_EEEND_____ MAPS (Manpower analysis and planning system) and WinPGS (System for generating paper-copy proposals).Technologies: C++, VB, COM, Access, SQL From April 1997 to January 1999 (1 year 10 months) BulgariaProgrammer @ Europe IIRC Developer - in-house insurance policies and coverage tracking system. This was an end-to-end system for managing of the lifetime of the insurance coverage for each client; statistical analysis of the coverage/payments data; document inventory.Technologies: Excel, Access From June 1995 to January 1997 (1 year 8 months) BulgariaProgrammer @ RISS Developer - Windows device drivers for an in-house video capture boards.Developer - GIS _____ILLEGAL_CHAR_SSSTART147ILLEGAL_CHAR_EEEND_____Tellus_____ILLEGAL_CHAR_SSSTART148ILLEGAL_CHAR_EEEND_____ (used in the restitution of ownership of agricultural properties, nationalized by Bulgarian Communistic government). Design and implementation of low-level data storage, transaction subsystem, and virtual memory.Developer - software for end-point lottery terminals for Bulgarian national lottery. Design and implementation of transaction system and low-level data storage. Part implementation of optical recognition of the lottery tickets. DOS device drivers for the lottery terminals embedded printer device.Technologies: C/C++, Pascal, Win32, NET DDE, x86 assembler From December 1993 to April 1995 (1 year 5 months) Bulgaria

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Francislav Penov's Personality Type

Extraversion (E), Intuition (N), Feeling (F), Judging (J)

Average Tenure

2 year(s), 7 month(s)

Francislav Penov's Willingness to Change Jobs



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