Valeriy Karkachev, Developer in Antalya, Turkey
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Valeriy Karkachev

Verified Expert  in Engineering

Software Developer

Location
Antalya, Turkey
Toptal Member Since
August 17, 2022

valery已经在软件行业工作了超过25年, 专门利用微软堆栈构建高性能桌面应用程序. He is a self-motivated, 面向细节的问题解决者，保证最好的代码质量和性能. 瓦莱里喜欢他的工作，并不断努力改进，更喜欢全职工作.

Software DevelopmentTroubleshootingMultithreadingWindows ServicesData ScrapingBack-endWeb ScrapingWindowsWindows App DevelopmentWindows APIWindows UIWindows DesktopC#Visual Studio.NETDevExpressDICOM

Portfolio

KSR Automation
c#， Windows Presentation Foundation (WPF)， HTTP, Discord Bots...
Online Freelance Agency
c#， Windows Presentation Foundation (WPF)， Windows App Development, c#.NET...
K&A Engineering Consulting
c#， Windows Presentation Foundation (WPF)， PostgreSQL, REST, ASP.NET Core...

Experience

Performance Tuning - 20 years.NET - 15 yearsMultithreading - 15 yearsC# - 15 yearsWindows Presentation Foundation (WPF) - 12 yearsXAML - 10 yearsModel View ViewModel (MVVM) - 7 yearsSciChart - 5 years

Availability

Full-time

Preferred Environment

Windows, c#， Windows Presentation Foundation (WPF)，多线程，Visual Studio， .NET, SciChart, .NET Core, C#.NET, .NET 6, .NET MAUI, Windows Desktop, Desktop App Development

The most amazing...

...我一个人从头开始开发的是一个x射线图像采集和处理软件，被全球100多家诊所使用.

Work Experience

Senior Software Engineer

2021 - PRESENT
KSR Automation
  • Improved UI legacy to run smoothly and asynchronously.
  • 优化性能，允许数千个工作单元同时运行.
  • 处理4000+活跃用户的用户请求和bug报告，以改进现有功能或添加新功能.
  • 与项目所有者一起实现应用程序的性能关键部分, including complex multithreaded processes, task synchronization, and scheduling.
Technologies: c#， Windows Presentation Foundation (WPF)， HTTP, Discord Bots, Windows App Development, C#.NET, .NET, Troubleshooting, Root Cause Analysis, XAML, Model View ViewModel (MVVM), Multithreading, Visual Studio, Software Development, ReSharper, REST APIs, API Integration, MVVM Light Toolkit, SQL Server 2016, Agile Software Development, Performance Tuning, Object-oriented Design (OOD), Integration, CSV, SQLite, Dapper, Web Scraping, Data Scraping, Scraping, SDKs, Windows API, Win32, Windows UI, Windows Desktop, Desktop App Development, Back-end

Freelance Software Engineer

2013 - 2022
Online Freelance Agency
  • Worked on more than 50 projects for over 10,000 hours.
  • 在近9年的时间里，一直保持着顶级+的地位和100%的工作成功得分.
  • 不断收到客户的五星反馈.
  • 获得了“分析技能前5%的自由职业者”和“c#技能前5%”的徽章.
技术:c#， Windows Presentation Foundation (WPF)， Windows App Development, c#.NET, .NET, Troubleshooting, Root Cause Analysis, XAML, Model View ViewModel (MVVM), Microsoft SQL Server, Windows Services, Multithreading, Visual Studio, Software Development, SQL, MySQL, Entity Framework Core, ReSharper, .NET 6, REST APIs, API Integration, MVVM Light Toolkit, SQL Server 2016, PostgreSQL 10, Agile Software Development, Performance Tuning, Object-oriented Design (OOD), Integration, CSV, SQLite, Dapper, Web Scraping, Data Scraping, Scraping, Instagram, Canon EDSDK, SDKs, .NET MAUI, Xamarin, Windows API, Win32, Windows UI, Windows Desktop, Desktop App Development, Back-end

Senior Software Engineer

2021 - 2021
K&A Engineering Consulting
  • Developed Firefly system using C#, WPF, and PostgreSQL, 帮助电力公司维护他们的基础设施.
  • 将旧UI从WinForms转换为WPF，提高了UI性能.
  • Optimized SQL queries to improve database performance.
  • Converted the codebase to the latest .NET 6 version.
技术:c#， Windows Presentation Foundation (WPF)， PostgreSQL, REST, ASP.NET Core, Windows App Development, C#.NET, .NET, Troubleshooting, Root Cause Analysis, XAML, Model View ViewModel (MVVM), Microsoft SQL Server, Windows Services, Multithreading, Visual Studio, Software Development, SQL, ReSharper, .NET 6, REST APIs, API Integration, MVVM Light Toolkit, PostgreSQL 10, Agile Software Development, Performance Tuning, Object-oriented Design (OOD), Integration, CSV, SQLite, SDKs, Windows API, Win32, Windows UI, Windows Desktop, Desktop App Development, Back-end

Senior Software Engineer

2018 - 2020
QuantRes
  • 开发了一套工具来帮助交易者改善他们的业务.
  • 使用c#， WPF, SQL，高性能图表和复杂的数学.
  • Used Jira to track tasks and Git as version control.
Technologies: C#, Windows Presentation Foundation (WPF), Telerik WPF, SQL, C++, SciChart, Windows App Development, C#.NET, .NET, Troubleshooting, Root Cause Analysis, XAML, Model View ViewModel (MVVM), Microsoft SQL Server, Windows Services, Multithreading, Visual Studio, Software Development, ReSharper, API Integration, Agile Software Development, Performance Tuning, Object-oriented Design (OOD), Integration, CSV, SDKs, Windows API, Win32, Windows UI, Windows Desktop, Desktop App Development, Back-end

Senior Software Engineer

2017 - 2019
Medicatech USA
  • 开发公司主要产品Voyance x射线采集软件.
  • 在使用x射线硬件api拨号时，使用各种UI/UX和x射线图像处理.
  • Used the technology stack, including C#, .NET 4.7, WPF, Entity Framework, and PInvoke.
技术:c#， Windows Presentation Foundation (WPF)， SQL, Windows App Development, c#.NET, .NET, Troubleshooting, Root Cause Analysis, XAML, Model View ViewModel (MVVM), Multithreading, Visual Studio, Software Development, ReSharper, API Integration, Agile Software Development, Performance Tuning, Object-oriented Design (OOD), Integration, CSV, SDKs, Windows API, Win32, Windows UI, Windows Desktop, Desktop App Development, Back-end

Senior Software Engineer

2014 - 2018
Lacima
  • 致力于风险管理系统Lacima Analytics, used by multiple power companies across Australia.
  • 使用c#、WinForms和DevExpress组件开发UI/UX.
  • 应用高等数学和统计学编写后端代码和分析模块.
  • 使用Jira作为报告工具实现新功能，跟踪和修复bug.
Technologies: C#, DevExpress, Entity Framework, Windows Forms (WinForms), SQL, Jira, Windows App Development, C#.NET, .NET, Troubleshooting, Root Cause Analysis, XAML, Microsoft SQL Server, Windows Services, Multithreading, Visual Studio, Software Development, C#.NET WinForms, ReSharper, Agile Software Development, Performance Tuning, Object-oriented Design (OOD), CSV, SDKs, Windows API, Win32, Windows UI, Windows Desktop, Desktop App Development, Back-end

Tech Lead | Project Manager

2005 - 2010
Altosoft
  • 开发移动软件测试平台，进行代码评审和技术访谈.
  • 实现了与图像和文本识别相关的关键部分代码, such as C# and Visual Studio 2005-2008.
  • 在20 - 25人的团队中担任项目经理.
Technologies: C#, DevExpress, Telerik, SQL, Jira, Git, Subversion (SVN), Teams, ReSharper, TeamCity, Windows App Development, C#.NET, .NET, Troubleshooting, Root Cause Analysis, XAML, Microsoft SQL Server, Windows Services, Multithreading, Visual Studio, Software Development, C#.NET WinForms, Agile Software Development, Performance Tuning, Object-oriented Design (OOD), CSV, SDKs, Windows API, Win32, Windows UI, Windows Desktop, Desktop App Development, Back-end

Software Engineer

1999 - 2005
Vibrotek
  • 使用Delphi 3 ~ 7、C、c#开发工业自动化软件.
  • 为智能测量工具开发固件，用于诊断和维护重型机械.
  • 使用公司专有的bug跟踪系统实现新功能并修复bug.
Technologies: Delphi 7, C, C#, Windows App Development, Troubleshooting, Root Cause Analysis, Microsoft SQL Server, Visual Studio, Software Development, Performance Tuning, Object-oriented Design (OOD), CSV, SDKs, Windows API, Win32, Windows UI, Windows Desktop, Desktop App Development, Back-end

QuickBooks | Database Synchronizer

这是一项Windows服务，可以跟踪QuickBooks桌面中的更改，并将其与专有应用程序数据库中的更改同步(双向). 这项服务每周7天、每天24小时运行，为确保其可靠性已作出了相当大的努力.

X-ray Acquisition and Processing Software | Voyance

http://medicatechusa.com/voyance/
Voyance Acquisition是业界领先的完整软件套件，提供安全和经济高效的收购方式, view, and share DICOM images. 它可以与不同的x射线传感器硬件通信，并处理或增强图像. 它还有一套测量工具和病人数据库.

我加入这个项目时，由于工程质量差，它即将在发布前失败. 我使用c#和WPF从头开始重新构建应用程序.

该软件有几个发布版本，出售了数百个许可证. 来自诊所的评价非常好，我相信我留下了很好的形状.

跨平台桌面CRM应用程序与Avalonia UI构建

一个在macOS, Windows和Linux上工作的富UI桌面应用程序.

它显示来自数据库的表格数据，并允许创建, editing, and deleting objects, including client records, jobs completed for clients, job-related images, and more. The application is built using .NET Core 7.0, C#, and Avalonia UI.

Languages

C#, C#.NET, XAML, SQL, Delphi 7, C, C++

Frameworks

Windows Presentation Foundation (WPF), .NET, .. NET Core, MVVM Light Toolkit, Entity Framework Core, ASP.NET Core

Libraries/APIs

Windows窗体(WinForms)， scchart, Windows API，实体框架，QuickBooks API, REST API

Tools

Visual Studio, Subversion (SVN), ReSharper, C#.NET WinForms, Jira, Git, TeamCity, Dapper

Paradigms

Object-oriented Design (OOD), Windows App Development, Model View ViewModel (MVVM), Desktop App Development, Agile Software Development, REST

Platforms

Windows, Win32, Windows UI, Windows Desktop, Telerik WPF, Telerik, Xamarin

Other

Multithreading, Software Development, Performance Tuning, Troubleshooting, Root Cause Analysis, Windows Services, .NET 6, CSV, Web Scraping, Data Scraping, Scraping, Back-end, IT Systems Engineering, DevExpress, DICOM, Geometry, Image Processing, API Integration, Integration, Instagram, Canon EDSDK, SDKs, .NET MAUI, Teams, HTTP, Discord Bots, Intuit QuickBooks

Storage

MySQL, PostgreSQL, SQL Server 2016, Microsoft SQL Server, PostgreSQL 10, SQLite

1996 - 2001

Master's Degree in System Engineering

圣彼得堡国立海洋技术大学-圣彼得堡，俄罗斯

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与你选择的人才一起工作，试用最多两周. Pay only if you decide to hire them.

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