Vladislav Khapin Email & Phone Number

Remote

Remote

We continued development with Xamarin Forms, but later started development of our own Fabulous/Xamarin Native framework for project rewrite due to performance issues of Xamarin Forms. During development found bugs in mono arm64 compiler which made impossible transition to F#5 on both platforms. Guided new developers on F# practices and learning the language, played active role in code review.Key tasks:iOS and Android UI development in cooperation with a team of UI designers, later switched to Xamarin Native. Added support for encoding of videos to platform agnostic codec. During work on native iOS app worked on Fabulous bindings for UIKit views.Integration of native libraries via Xamarin binding libraries for iOS and Android. Created wrapper around SDWebImage/rLottie to support Lottie animations on iOS, also added support for Android via existing native library.

Remote

As a team of three developers we started development of a messenger application based on existing MTProto protocol implementation on the server side inside company. For this task .NET Xamarin Forms framework was chosen with Fabulous (F#) MVU framework around it.Key tasks:iOS and Android UI development in cooperation with a team of UI designers. Largest impact was adding support of notifications for iOS and Android according to TL schema and development of basic chat app for iOS with support of image previews, gifs and videos.Development and optimization of client MTProto protocol implementation in F# in close cooperation with backend developers. Added support for automatic resend mechanism of messages on connection loss. Reported a bug in async implementation in FSharp.Core.Integration of native libraries via Xamarin binding libraries for iOS and Android. Added support for Glide, built custom library around Nuke framework for iOS for image caching, added support for gifs on both platforms.

Saint Petersburg, Russian Federation

Oracle Database 11/12c development: schema design, stored procedures, analytic views and more. Done three projects for an economic company which helped them to automate calculations, and document data processing and review via Oracle Database and Apex products.Developed a ASP .NET MVC 5 web application for exporting data as Visio diagrams.Developed a static ASP .NET Core/Vue Js web site for iternal use inside company.Developed a ASP .NET Core/F#/Angular web application for software updates monitoring.Extensibility of Terrasoft Bpmonline CRM.Introduced and supported the use of Docker for .NET Core applications in team. Introduced and supported Teamcity for CI\CD in team. Introduced Git practices.

Saint Petersburg, Russian Federation

Completed a .NET/ASP .NET MVC 5 project for Excel documents verification, took part in database development in other projects.

Saint Petersburg, Russian Federation

Took part in development of a product utilizing Manhattan SCALE Warehouse system. Did research and analysis of SDK functions. Developed logic for the product, developed WCF endpoints.