Software Engineer Senior

VLADIMIR KELMAN

Silver Spring, MD ***** 301-***-**** *******@*****.*** linkedin.com/in/vkelman SOFTWARE ENGINEER SUMMARY

Meticulous Software Engineer with a respected reputation for innovative software development utilizing accurate, structured, and documented code. A strategic mind with MS AZ-900 Certification and unmatched attention to detail. Extensive experience in full-stack application development with .NET, C#, JavaScript, jQuery, Push Notifications, MS Azure Cloud. Committed to innovation through utilizing next generation technologies. AREAS OF EXPERTISE

Software Development Back and Front-End Development Database Design Requirements Analysis Agile Methodologies Structured High-Quality Code Attention to Details TECHNOLOGY

C# ASP.NET .NET 8 Core WebAPI Services Razor MVC SignalR SAML SSO OAuth Entity Framework SQL Server JavaScript jQuery HTML CSS REST Json XML Git MS Azure Cloud / AKS App Insights Splunk Dynatrace SaaS IIS Kestrel

PROFESSIONAL EXPERIENCE

GEICO, Chevy Chase, MD September 2019 – September 2024 Senior Software Engineer

Designed, developed, and maintained cloud-based (MS Azure AKS) .NET MVC Web apps and WebAPI Services, C# APIs, SQL Server back end, designed and implemented advanced jQuery SPA with MS SAML Single sign-on.

• Created and maintained applications acting as an intelligent data exchange layer between GEICO internal departments and external LexisNexis and Explore vendors.

• Our applications allowed to deduplicate and send hundreds of Web API requests per second to vendors, to get back Motor Vehicle (MVRs) and Comprehensive Loss Underwriting Exchange (CLUE) reports, store in SQL databases, reconcile and map data, and feed it to GEICO departments.

• Spearheaded SimMC .NET application that generated MVR and CLUE reports to train GEICO Sales. SimMC produced consistent simulated LexisNexis reports with correct US States driver licenses.

• Implemented SimMC UI as user-friendly jQuery-based SPA, which enforced consistency of user data. SimMC replaced the work of several GEICO analysts and saved hundreds of thousands of dollars for GEICO.

• Rewrote from scratch the large GEICO MVR application converting from old .NET Framework to .NET 8 Core. Improved consistency and reliability and added proper error handling.

• Converted SimMC application from .NET Framework to .NET 8 Core, to run under cheaper AKS and to continue Microsoft support. Fixed compatibility with GEICO client apps.

• Replaced SQL Agent Jobs with .NET Background Tasks to consolidate functionality of data archiving and reconciliation.

Everbridge / PlanetRisk / iMapData, Mclean, VA October 2013 – July 2019 Software Developer

Designed, developed, and maintained SaaS .NET Web applications and Web Services, with JavaScript / AngularJS front- end, Bing/ESRI/HERE maps, SignalR Push Notifications; implemented SAML Single sign-on, developed integrated XMPP chat with Openfire and ejabberd servers. NodeJS development. Participated in FedRAMP certification.

• Transformed monolithic Incident Management Service (IMS) ASP.NET web application into a single-page front end and WebAPI web services protected by OAuth 2.0.

• Participated in securing web applications, removed sensitive data from being passed through URLs, proper authentication and authorization of .NET pages.

• Implemented SAML-based Single sign-on functionality with IMS as Service Provider and Everbridge clients as Identity Providers, allowing users of Everbridge clients to automatically log into IMS.

• Replaced timer-based IMS notifications with SignalR push notifications.

• Led development of XMPP chat with Openfire and then with ejabberd backend servers, integrated into Everbridge Incident Management System (IMS) web application.

• Developed the front-end of Incident Manager application using Angular framework.

• Designed and developed DateTimeZone web service based on NodaTime, allowing to determine full IANA / TZ time zone information (offset, DST, full zone name, etc.) from a combination of local time and latitude / longitude. That ensured date/time/zone consistency of the global IMS data.

• Participated in obtaining FedRAMP certification turning IMS application into JARVISS (Joint Analytic Real-Time Virtual Information Sharing System) used by US Army and Navy. ADDITIONAL RELEVANT EXPERIENCE

Computing Technologies, Inc. (CoTs), Fairfax, VA April 2005 – June 2013 Software Engineer

Designed and developed the new ASP.NET version of CoTs Intranet while maintaining the legacy Intranet in ASP.

• Designed new modules, enhanced database structure, and developed dynamic client-side interface using Ajax. Spearheaded development of structured, domain-driven design of CoTs Intranet. Applied functional programming – extension methods, lambda expressions, LINQ.

• Developed a technique for secure data exchange between ASP.NET and legacy ASP pages. Led development of a custom single sign-on module for CoTs Intranet.

• Introduced a structured approach of reusable functions located in ASP include files to maintain legacy codebase.

• Pioneered a custom permission system for intranet that made it easy to maintain CoTs Intranet permissions. Recognized with CoTs Employee of The Quarter Award. Enterprise Database Corp., Manassas, VA October 2003 – February 2005 Programmer/Analyst

Designed and implemented Natural Disaster School Alert System using ASP, JavaScript and Ajax as a front-end, Visual Basic DLLs and SQL Server.

• Created an application that alerted schools and individuals over their phones and email in real time. Robert Half Technology / ECOS / Centech Group, Fairfax, VA February 2003 – April 2003 Programmer/Analyst

In Centech Group, designed and developed major parts of Phoenix application used by Calhoun County, AL to distribute protective gear (FEMA CSEPP), the 14 million dollar project.

• Phenix application Served 1000s of Calhoun County residents. See Journal of Emergency Management Vol. 3, No. 4, July/August 2005, “Preparing people with special needs for emergencies”.

EDUCATION

Bachelor of Science, BS, Physics and Astronomy Education Moscow Educational University, Moscow, Russia

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