Yevgeniy is available for hire
Hire YevgeniyYevgeniy Yanavichus
Verified Expert in Engineering
Full-stack Developer
Astana, Kazakhstan
Toptal member since August 5, 2013
Bio
Yevgeniy is a senior .NET/full-stack software engineer with 16+ years of experience building enterprise web, desktop, and integration-heavy applications for international clients. He has a strong background in C#, .NET, ASP.NET, SQL Server, Avalonia, .NET MAUI, DevExpress, reporting systems, XML/XSLT, HL7/FHIR, Azure, AWS, and distributed system design. He is experienced in legacy modernization, architecture design, technical leadership, remote collaboration, and long-running product support.
Portfolio
FormingSoft
.NET 8, Avalonia, Model View ViewModel (MVVM), AvaloniaEdit...
Alico Inc.
Transact-SQL (T-SQL), SQL Server Reporting Services (SSRS), Crystal Reports...
United Pork Producers Company Limited t/a Premium Foods
Windows UI, XML, XSD, XML Web Services, Integration, C#, APIs, Back-end...
Experience
- JavaScript - 10 years
- .NET - 10 years
- Microsoft SQL Server - 10 years
- AngularJS - 3 years
- Angular - 2 years
Preferred Environment
Windows
The most amazing...
...software I've developed is a portal for a motion picture company.
Work Experience
Senior .NET Developer
2024 - 2026
FormingSoft
- Reviewed an incomplete desktop application and redesigned its architecture for long-term maintainability.
- Designed and implemented a modular layered architecture using .NET 8, Avalonia UI, MVVM, and clear separation between Domain, Application, Infrastructure, and Presentation layers.
- Built a Shell-based multi-pane UI with dynamic routing, document navigation, properties panel, and DI-driven use-case orchestration.
- Implemented Windows clipboard monitoring via native APIs while isolating platform-specific functionality behind abstractions to preserve cross-platform compatibility.
- Improved stability for long-running sessions by addressing memory usage, clipboard edge cases, and custom payload handling.
Technologies: .NET 8, Avalonia, Model View ViewModel (MVVM), AvaloniaEdit, Artificial Intelligence (AI), .NET 10
Web Developer
2016 - 2025
Alico Inc.
- Maintained and enhanced enterprise portals built with ASP.NET Web Forms, SQL Server, DevExpress, Crystal Reports, SSRS, and T-SQL.
- Supported long-running production systems used by business users in the agriculture domain.
- Designed architecture, coding style, deployment approach, and reporting solutions for related company projects.
- Developed and optimized business reports, database logic, and UI components.
Technologies: Transact-SQL (T-SQL), SQL Server Reporting Services (SSRS), Crystal Reports, ASP.NET, DevExpress, Entity Framework, Enterprise Software, Back-end, Full-stack, .NET Core, Data Structures, Database Architecture, Full-stack Development, Single Sign-on (SSO), Artificial Intelligence (AI), RESTFul APIs, Legacy Software, Legacy Code
Full-stack Developer
2023 - 2024
United Pork Producers Company Limited t/a Premium Foods
- Took over an active customs declaration project, reviewed the current state, clarified requirements, and defined the technical direction.
- Developed a cross-platform .NET MAUI application for brokers to create and submit customs declarations to a government agency.
- Implemented XML/XSD-based data flows, web service integrations, local SQLite storage, and API testing workflows using Postman.
- Fixed defects reported through Trello and improved application reliability across supported platforms.
Technologies: Windows UI, XML, XSD, XML Web Services, Integration, C#, APIs, Back-end, Postman, .NET, .NET MAUI, SQLite, Full-stack Development, RESTFul APIs, Legacy Software, Legacy Code
Full-stack .NET Developer
2022 - 2022
Panda S.W.S Ltd.
- Analyzed a legacy .NET system deployed in Azure and contributed to the design of a new Kafka-based architecture.
- Managed project transfer from the old development team, including investigating how everything works and creating sequence diagrams, creating test coverage, and fixing found bugs. Designed a safer database migration/update flow.
- Contributed to new features, such as fixing bugs reported by the old team, adapting the project to new requirements, and implementing features requested by new clients.
Technologies: .NET, SQL, C#, ASP.NET, ASP.NET MVC, jQuery, SQL Stored Procedures, SQL Server 2016, Node.js, Azure, IIS, Enterprise Software, Back-end, Full-stack, .NET Core, Agile Software Development, Technical Leadership, API Integration, Software Architecture, Data Structures, Database Architecture, Software as a Service (SaaS), Full-stack Development, RESTFul APIs, Legacy Software, Legacy Code
Full-stack .NET Engineer
2021 - 2021
ContractPodAi
- Finished DocuSign integration, including making eSignature API request signatures, automating forms, and tracking documents easily.
- Implemented AdobeSign integration, including sending for signing, checking the document signing status, downloading the agreement, and more.
- Worked on ongoing issues such as fixing bugs, implementing new features, etc.
Technologies: ASP.NET Web Forms, Web API, Vue, DocuSign, Adobe Sign, Enterprise Software, Back-end, Full-stack, .NET Core, Agile Software Development, API Integration, Software Architecture, Data Structures, Database Architecture, Fintech, Software as a Service (SaaS), Full-stack Development, RESTFul APIs
XSLT Developer
2020 - 2021
Trust in People
- Examined various clinical document architecture (CDA) such as Gnuplot Postscript (GP PS), prescriptions, hospital and pharmacy, and HL7 (Health Level 7 international) formats.
- Implemented mapping from various versions of HL7 V3 (CDA) to the latest HL7 FHIR.
- Developed a REST API with Spring Boot inside a Docker image.
Technologies: Spring Boot, HL7, HL7 FHIR Standard, Docker, Saxon, XSLT 2, XML, RESTful Development, REST APIs, Algorithms, XSLT, Back-end, Technical Leadership, Data Structures, Database Architecture, Full-stack Development, RESTFul APIs
Microsoft Stack Developer
2019 - 2019
Stage 4 Enterprises, Inc.
- Implemented several different Vue.js components.
- Proposed a set of architecture and implementation improvements.
- Handled ongoing tickets, fixed bugs, implemented new features, and more.
Technologies: Azure, Vue, ASP.NET Core MVC, ASP.NET MVC, Back-end, Full-stack, .NET Core, Agile Software Development, API Integration, Software Architecture, Data Structures, Database Architecture, Full-stack Development, RESTFul APIs
Lead Developer
2019 - 2019
Shipalytics, LLC
- Designed the architecture for a real-time big data processing system with rich data visualization and analysis.
- Led a small team during the initial phase of development.
- Resolved technical issues regarding the handling of large files.
Technologies: Amazon Web Services (AWS), PostgreSQL, Apache Spark, Vue, Node.js, Architecture, Back-end, Full-stack, Agile Software Development, Technical Leadership, API Integration, Software Architecture, Data Structures, Database Architecture, Full-stack Development, RESTFul APIs
Lead Software Developer
2016 - 2019
Deluxe Entertainment Services Group
- Led the development of a portal written in Yii, AngularJS, MySQL, and AWS.
- Helped out other teams with ongoing development tasks.
- Designed architecture for a set of projects using open source stack.
- Created an API built on Express.js based on a previously developed monolith web application.
Technologies: Amazon Web Services (AWS), Node.js, Docker, Laravel, Angular, XSD, XSLT, MySQL, AngularJS, Yii, Full-stack, Agile Software Development, Technical Leadership, API Integration, Software Architecture, Data Structures, Database Architecture, Software as a Service (SaaS), Full-stack Development
Lead Software Developer
2015 - 2016
Sferastudios
- Created a web portal using an open-source stack with PHP and JavaScript.
- Led a small team to create a portal using Yii, AngularJS, and AWS.
- Created a web application for managing global trailer launches across major social media platforms and markets using Laravel and Angular.
Technologies: Laravel, Angular, Amazon Web Services (AWS), MySQL, AngularJS, Yii, Full-stack, Agile Software Development, Technical Leadership, Data Structures, Database Architecture, Software as a Service (SaaS), Full-stack Development
Software Developer (Remote)
2014 - 2015
Scopic Software
- Created a web portal for a medical industry startup.
- Contributed to the development of a corporate website.
- Helped develop different desktop projects using the .NET stack.
- Created a web portal for a motion picture industry startup.
- Built many other useful utilities, including web, desktop, and background jobs.
Technologies: AngularJS, Yii, Windows Forms (WinForms), Classic ASP, Full-stack, Agile Software Development, Data Structures, Database Architecture, Full-stack Development
Software Developer
2013 - 2015
Sycat IMS
- Created a translation wizard to import and export the business process management data.
- Implemented the caching of business data using some complex algorithms.
- Created code coverage tests and other test methods to pass those tests.
- Wrote several guides for developers regarding exception handling, naming conventions, and design patterns.
- Fixed other ongoing issues related to business process design.
Technologies: NUnit, Infragistics, CSLA, NHibernate, Windows Forms (WinForms), Full-stack, Agile Software Development, Data Structures, Database Architecture, Full-stack Development
.NET Developer (Remote)
2012 - 2013
WebCreek
- Worked with a proprietary framework mainly intended for automatic UI creation. Fixed different bugs and implemented new features.
- Developed UI using DevExpress .NET WinForms controls.
- Worked with web services and implemented integration with logistics services, such as UPS Freight, SAIA, and Averitt.
- Developed several SSRS reports for different projects.
- Worked with business logic in T-SQL and PL/SQL, fixing bugs and implementing new features.
- Created UI using DevExpress ASP.NET controls for different projects.
- Used HTML, jQuery, JavaScript, and CSS for web development.
- Worked on creating an installer using WiX for different projects.
Technologies: Windows PowerShell, XAML, JavaScript, Transact-SQL (T-SQL), .NET, Full-stack, Agile Software Development, Data Structures, Database Architecture, Full-stack Development, Legacy Software
.NET Developer
2010 - 2012
TREI-Oskemen, Ltd.
- Developed a WPF 3D company website with a hierarchical article structure.
- Created an HMI UI for using WPF, custom controls, Telerik controls, and MVVM.
- Developed application servers as managed Windows services, using WCF for client-server communication and MS SQL Server as a database server.
- Created and implemented various mathematical models.
- Developed CIMPLICITY screen parser with the ability to convert to WPF screen.
- Worked with .NET CE-based controllers and implemented some workflows using them.
Technologies: Prism, Windows Communication Foundation (WCF), Windows Presentation Foundation (WPF), Transact-SQL (T-SQL), XAML, C#, Data Structures, Database Architecture, Full-stack Development
Microsoft Dynamics AX Developer
2009 - 2010
Sigma Ust-Kamenogorsk
- Examined various MS Axapta 4.0 modules, including general ledger, human resources, and payroll.
- Fixed ongoing issues and implemented new features with MorphX IDE.
- Developed new features using X++ programming language.
- Created new and adjusted existing reports using the built-in reports feature.
- Developed new and adjusted existing reports using Excel templates.
Technologies: Axapta, X++, Data Structures, Database Architecture, Microsoft Dynamics
Experience
Alico Magic
http://www.landmagic.com/Alico Magic is a .NET based set of web-based commercial agriculture software products. It was formerly called LandMagic. I fixed the ongoing issues and implemented new features. I also moved the Entity Developer, Entity Framework, and distributed caching to a new data access layer:
Sfera Frontier
http://frontier.sferalabs.com/Web-based tool that helps app developers verify their packages before sending them to Apple Store, Google Play or Netflix. Sfera Frontier also features a Chrome extension that enables interface similar to desktop apps.
OFS PRO
OFS PRO is a comprehensive software solution for the field service enterprise. It combines work order automation, asset maintenance and tracking, customer relationship management, field service, dispatch, and field inventory into one complete service management solution.
Sfera Studios
Sfera studios is a cloud-based web application that uses proven and secure technology for distributed services.
Apollo Dart
Live data viewer for Dynamic Drilling. Implemented as a WinForms client with an MDI interface and Infragistics controls, including live chart controls.
Desktop Assistance
Managed a statistics service and client report viewer utility for Hewlett Packard. Built as a managed .NET service and WPF client application with Excel automation. Utilizes T-SQL stored procedures and WiX Toolset.
BLIMS
ERP-type management system. Implemented as WinForms and WebForms clients based on a proprietary company framework. Uses DevExpress controls, T-SQL, SSRS, and built-in and external web services.
Smart Sampler
Sampler control application for Zhezkent concentration mill. Built for WinPAC8441 controller as a WinForms application with SQL Server Compact for data storage.
Vezuvio
Automatic melting system for Aksu Ferroalloy plant. Implemented as WPF (XBAP) desktop application with Telerik controls and custom controls using the MVVM pattern and TPL, Entity Framework, T-SQL, and WCF technologies.
Direct-to-Debut
This cloud-based web application was developed to empower any digital marketing efforts.
Scopic Portal
Scopic Portal is an internal tool created only for Scopic employees.
Education
2005 - 2009
Bachelor's Degree in Information Systems
East Kazakhstan State Technical University - Oskemen, Kazakhstan
Certifications
DECEMBER 2025 - PRESENT
Kaspi Certified NLP Developer
Kaspi.kz
JANUARY 2018 - PRESENT
WhiteHat Certified Secure Developer
WhiteHat Security
AUGUST 2016 - PRESENT
Functional Programming Principles in Scala
École Polytechnique Fédérale de Lausanne | via Coursera
NOVEMBER 2015 - PRESENT
Hadoop Platform and Application Framework
University of California San Diego | via Coursera
NOVEMBER 2015 - PRESENT
Programming Mobile Services for Android Handheld Systems: Concurrency
Vanderbilt University | via Coursera
OCTOBER 2015 - PRESENT
Introduction to Big Data (2015)
University of California San Diego | via Coursera
JUNE 2015 - PRESENT
Programming Mobile Applications for Android Handheld Systems: Part 2
University of Maryland, College Park | via Coursera
MAY 2015 - PRESENT
Programming Mobile Applications for Android Handheld Systems: Part 1
University of Maryland, College Park | via Coursera
JANUARY 2012 - PRESENT
PI System Manager I: Essential Skills
OSIsoft
Skills
Libraries/APIs
Vue, Infragistics, jQuery, Node.js, Windows Forms (WinForms), REST APIs, Web API, Entity Framework, PyTorch
Tools
Microsoft Visual Studio, Microsoft Dynamics, Microsoft Access, Crystal Reports, Prism, Saxon, Windows Azure SDK, Adobe Sign, Postman, AvaloniaEdit
Languages
SQL, JavaScript, C#, PHP, Visual FoxPro, XSLT, XSD, Transact-SQL (T-SQL), X++, XAML, XML, XSLT 2, Java, Python
Frameworks
Angular, .NET, .NET Core, ASP.NET MVC, Yii, AngularJS, Windows Presentation Foundation (WPF), Classic ASP, NHibernate, CSLA, NUnit, Laravel, ASP.NET, Apache Spark, ASP.NET Core MVC, Windows PowerShell, Spring Boot, ASP.NET Web Forms, .NET MAUI, Avalonia, LangGraph, .NET 8
Paradigms
Agile Software Development, HL7 FHIR Standard, RESTful Development, Model View ViewModel (MVVM)
Storage
Database Architecture, Microsoft SQL Server, MySQL, Amazon S3 (AWS S3), PostgreSQL, SQL Server Reporting Services (SSRS), SQL Stored Procedures, SQL Server 2016, SQLite, Databases
Platforms
Telerik, Windows, Visual Studio Code (VS Code), MacOS, Docker, Azure, Amazon Web Services (AWS), Windows UI
Other
Architecture, Back-end, Full-stack, Technical Leadership, API Integration, Software Architecture, Data Structures, Full-stack Development, Single Sign-on (SSO), .NET 10, RESTFul APIs, Legacy Software, Legacy Code, DevExpress, Enterprise Software, Software as a Service (SaaS), Artificial Intelligence (AI), Axapta, Windows Communication Foundation (WCF), Algorithms, HL7, Data Visualization, DocuSign, IIS, XML Web Services, Integration, APIs, Fintech, Large Language Models (LLMs), LLaVA, RAG Pipelines, RAG Architecture, FAISS, FastAPI, AI Tools, LangChain
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