Freelance Software Developer
2012 - PRESENTToptal Clients- Provided ongoing services as a remote ASP.NET Core/C#/.NET developer for Toptal clients.
- Designed architecture and implemented ASP.NET and Web API applications.
- Designed and implemented data storage.
- Implemented automated tests: unit tests, integration tests, functional test, and automated UI tests.
- Explored the most effective technologies and came up with ideas to achieve the client's business requirements and goals.
- Reported status updates regularly to appropriate audiences.
- Documented the codebase and technical aspects.
Technologies: Visual Studio, ASP.NET Web API, Software Architecture, APIs, Web Services, SQL, CSS, HTML, JavaScript, C#, .NET, ASP.NET CoreSenior .NET Developer
2020 - 2020Callahan Software- Integrated online payments via Stripe API with connected accounts to the Child Care Seer platform.
- Implemented finance-related API endpoints logic for online and offline payments for the Child Care Seer platform.
- Implemented handling the Stripe webhook event callbacks for asynchronous payment flows and managing connected Stripe accounts for the platform clients.
- Configured and maintained Stripe accounts for development, testing, and production environments.
- Participated in business analysis team discussions, code reviews, and common meetings for the agile software development process.
- Migrated codebase to .NET Core 3.0, assisted in establishing CI/CD pipelines for back-end code.
Technologies: Visual Studio, API Design, Software Architecture, Stripe Connect API, ASP.NET Web API, .NET, .NET Core, Entity Framework Core, Swagger, Stripe API, ASP.NET Core, C#Senior .NET Developer
2019 - 2019Blacc Spot Media- Developed a .NET Core application back end for the Cystic Fibrosis Foundation, a 501 nonprofit organization in the United States established to provide the means to cure cystic fibrosis and ensure that those living with CF live long and productive lives.
- Designed and implemented API endpoints using .NET Core for React UI app.
- Fixed bugs and improved the code.
Technologies: Visual Studio, ASP.NET Web API, .NET, C#, Zendesk API, Twilio API, SendGrid API, Razor, AutoMapper, Entity Framework Core, Swagger, .NET Core, ASP.NET CoreSenior .NET Developer
2018 - 2019Dunnhumby- Ramped up .NET expertise in Berlin's development center and mentor Dunnhumby full-timers on the server side aspects of .NET Core application development.
- Designed architecture for server-side APIs with a clean architecture approach.
- Integrated with company hybrid authentication and authorization for AD SSO/Google Directory API.
- Designed ASP.NET Core integration tests with xUnit and WebApplicationFactory.
- Developed server-side microservice APIs with external and cross-component dependencies in a Kubernetes environment.
Technologies: Visual Studio, Software Architecture, GitLab CI/CD, ASP.NET Core 2, ASP.NET Web API, .NET, C#, Single Sign-on (SSO), Google Apps Directory Sync (GADS), JSON Web Tokens (JWT), Google Kubernetes Engine (GKE), GitLab, PostgreSQL, xUnit, MediatR, Entity Framework Core, ASP.NET Core, .NET CoreFull-stack ASP.NET Core Developer
2018 - 2018Startup (via Toptal)- Implemented a dashboard web application from scratch based on ASP.NET Core 2.1 with Razor views and including dependency injection (DI) and Entity Framework Core, identity user, role, and claims management.
- Used SB Admin 2 template for the admin panel with Ajax callback and modal popups for CRUD operations over the entities.
- Implemented ASP.NET Core View Components to display common UI parts with the possibility to update data via jQuery unobtrusive Ajax.
- Configured code-first EF Core 2.1 migrations and automated the database recreation process, which updates schema and populates mandatory and sample data for manual smoke tests on the UI.
- Implemented 2FA logic to use TOTP authenticator apps from Google and Microsoft for iOS, Android, and Windows Phone devices.
Technologies: Visual Studio, Software Architecture, ASP.NET Core, ASP.NET Web API, Visual Studio Team Services (VSTS), Authentication, xUnit, Azure Blob Storage API, SQL, Bootstrap, JavaScript, SendGrid, AutoMapper, NuGet, ASP.NET Core MVC, ASP.NET, Entity Framework Core, DI, Model View Controller (MVC), Razor, .NET, .NET Core, C#, ASP.NET Core 2Senior Full-stack Developer
2018 - 2018NKR Managing General Agent (via Toptal)- Designed an ASP.NET Core application architecture for a digital claims management software application that leverages digital data from connected vehicles to automate property and casualty claims processes.
- Implemented model view controller (MVC) architecture with ASP.NET Core Razor views, dependency injection (DI) and Entity Framework (EF Core) according to UI layouts and business requirements.
- Implemented schema with a code-first Entity Framework core for SQL Server in AWS.
- Implemented a console for data emulation, test damage calculation, and application configuration.
- Implemented real-time internal application notifications based on SignalR.
- Implemented notifying external parties via SMS, email, and API.
- Integrated Google Maps geolocation API.
- Integrated NADA (National Automobile Dealers Association) API.
- Implemented asynchronous update-able ASP.NET Core view components.
- Wrote technical documentation.
Technologies: Visual Studio, API Design, ASP.NET Core MVC, Google Fusion Tables, ASP.NET Core 2, ASP.NET Web API, .NET, AWS S3, SQL, Bootstrap, SignalR, JavaScript, Google Maps API, Quartz.NET, Zendesk, Twilio, SendGrid, AutoMapper, ASP.NET, Entity Framework, DI, Model View Controller (MVC), Razor, .NET Core, C#, ASP.NET CoreFull-stack ASP.NET MVC Developer
2018 - 2018Kalon Creative (via Toptal)- Updated ASP.NET Razor views according to new InVision mockups.
- Adjusted ASP.NET views to be responsive for mobile view as well as for other screen sizes using Bootstrap.
- Optimized back-end logic to avoid performance issues and comply with the new UX approach on the front-end.
- Regenerated POT/PO internationalization files for string resources used for ASP.NET MVC application.
- Participated in code reviews of the pool requests for the branches before merging them to QA and Production environments.
Technologies: Visual Studio, ASP.NET Web API, .NET, Teamwork, Bitbucket, Visual Studio 2017, Bootstrap, jQuery, JavaScript, HTML, CSS, PostgreSQL, Entity Framework, C#, ASP.NET MVCSenior .NET Developer
2017 - 2018Tusmor, Ltd. (via Toptal)- Designed and implemented Bank Engine API using ASP.NET Core Web API.
- Configured continuous integration tasks to build and deploy API components to different Azure environments.
- Designed corresponding database schema for Azure SQL Server.
- Implemented unit tests using an in-memory database approach as well as integration tests for API endpoints.
- Configured API Explorer using Swagger UI via Swashbuckle package.
- Designed and implemented a simple React/Redux based UI for interacting with the API.
Technologies: Visual Studio, API Design, Software Architecture, ASP.NET Core MVC, ASP.NET Core, ASP.NET Web API, ASP.NET MVC, Bootstrap, Webpack, JSON, CsvHelper, FluentValidation, xUnit, AutoMapper, TypeScript, JavaScript, Redux, React, Swashbuckle, Swagger, Visual Studio Team Services (VSTS), Entity Framework, Microsoft SQL Server, Azure, Web API, ASP.NET Core 2, .NET, .NET Core, C#Senior .NET Developer
2017 - 2017Ascension Data and Analytics (via Toptal)- Developed the workflow to interact with an external OCR and machine learning system via API.
- Designed and implemented a background service for maintaining the queue and message pooling.
- Developed plugin-based architecture for processing queue messages.
- Deployed system modules and components.
- Implemented an API for UI to manage information in the mortgage servicing and capital markets space.
Technologies: API Design, Software Architecture, ASP.NET Web API, ASP.NET MVC, .NET, Jira, TFS, Visual Studio, Git, Core, SQL, AWS S3, Azure, XML, JSON, C#, Web API, Model View Controller (MVC), ASP.NET Core 2, .NET Core.NET Full-stack Developer
2016 - 2016Eurotech Global Sports AG (via Toptal)- Developed the server and client-side logic for the accreditation module of IFES system for FIFA events.
- Secured the components with the appropriate permissions.
- Implemented the export mechanism for the security data.
- Implemented the bulk update logic.
- Participated in the design sessions to discuss and plan the logic implementation.
Technologies: Visual Studio, API Design, .NET, SQL, JavaScript, AngularJS, ASP.NET Web API, ASP.NET MVC, C#Full-stack Web Developer
2016 - 2016Fitness Startup (via Toptal)- Developed a web application using ASP.NET MVC and Web API with an AngularJS-based client side.
- Automated live streaming using Azure Media Services.
- Built website content indexing and search using Azure Search Services.
- Processed background tasks by events-driven Azure Web Jobs.
- Developed back-end features using dependency injection principle for MVC controllers, services, and repositories.
- Conducted unit testing using the mocks and end-to-end testing of exposed API.
- Documented the API with Swashbuckle (.NET port of Swagger UI).
Technologies: Visual Studio, ASP.NET Web API, .NET, Visual Studio Online (VSO), Azure Search, Azure Media Services API, Azure Websites, Serilog, Unity, Atlassian Confluence, Jira, Git, Microsoft SQL Server, Swagger, Entity Framework, AngularJS, JavaScript, Web API, ASP.NET MVC, C#Lead/Senior Software Engineer (Telecommunication)
2014 - 2015MetTel (via Toptal)- Implemented a Knockout-based user interface for several modules of the control management panel.
- Implemented client-side logic in JavaScript which manages the nested grids and single page history navigation.
- Developed a micro framework for requesting information from Solr API and safe parsing of JSON data in C#.
- Implemented Web API services and corresponding business logic.
- Created and maintained unit tests for verification of Web API service controller actions.
Technologies: Visual Studio, Apache Solr, ASP.NET Web API, Solr, HTML, CSS, jQuery, JavaScript, Knockout.js, .NET, C#, ASP.NET MVCSenior C# Developer
2013 - 2014American Mortgage Consultants, Inc. (via Toptal)- Designed the software system architecture.
- Developed several components for the automatic recognition and processing of scanned forms.
- Implemented page detection and field value extraction business logic for scanned mortgage documents.
- Created and maintained unit tests covering the application business logic.
- Implemented UI for interacting with the OCR system via API services.
- Implemented a self-documented JSON-based Web API.
Technologies: Visual Studio, API Design, ASP.NET Web API, OCR, SQL, HTML, JSON, Web API, ASP.NET MVC, .NET, C#.NET Developer (Remote)
2012 - 20132can- Performed full-stack software development for the company's mobile card acquisition service, which is the Russian equivalent of the US Square service.
- Developed user interface Razor-based pages.
- Developed in C# the server side business logic, data access code, and unit tests.
- Implemented parsing packages using OpenIso8583.Net which is a .NET message builder and parser for ISO 8583 financial messages.
- Worked on customizing card acquisition service UI for specific banks.
Technologies: Visual Studio, ASP.NET Web API, .NET, Quartz.NET, NUnit, NHibernate, Castle Windsor, SQL, jQuery, CSS, HTML, Razor, ASP.NET MVC, C#Team Lead, .NET Developer
2011 - 2012Aspose- Worked full-time as a remote team leader for the GroupDocs Comparison project for GroupDocs.com (part of the Aspose family).
- Developed an ASP.NET MVC-based web application for comparing office documents.
- Developed and maintained the server side logic for comparing office documents.
- Did R&D for finding suitable comparison algorithms like Levenshtein distance, HTML Diff implementation, etc.
- Created and maintained the unit tests.
- Documented the API.
Technologies: Visual Studio, Software Architecture, ASP.NET Web API, .NET, OpenXML, JSON, Windows Communication Framework (WCF), Aspose Components, C#, jQuery, ASP.NET MVCSenior .NET Developer, Tech Lead, Project Manager
2008 - 2011Exigen Services- Led technical projects for Total Objects, a company involved in insurance brokering and reinsurance software systems.
- Used .NET (VB.NET, WinForms) and MS SQL Server technologies, as well as the Agile (Scrum) framework throughout the development process.
- Developed websites in the Scrum framework using .NET, Oracle, MS SQL Server, and DataFlux data management technologies.
- Worked as a senior .NET developer for T-Mobile Netherlands, one of the largest mobile telephone operators in the country.
- Implemented the Waterfall development paradigm using C#, WinForms, ASP.NET (WebForms), WCF, XML/XSLT, and Oracle technologies.
- Promoted to project manager, overseeing several projects for the company.
Technologies: HTML, CSS, Visual Studio, ASP.NET Web API, ASP.NET MVC, .NET, DataFlux, Microsoft SQL Server, Oracle, XML/XSLT, Windows Services, Windows Communication Framework (WCF), ASP.NET, C#Software .NET Developer (Remote)
2006 - 2008SharpStyle Labs- Created SharpStyle Neutron, a piece of software that allows developers to write ActionScript code from within Visual Studio 2005 using Visual Studio SDK.
- Participated in a ReviewBasics project with ASP.NET (WebForms) conducting collaborative market research.
- Developed video conversion web services using the Turbine Video Conversion SDK.
- Created and maintained the unit tests.
Technologies: Visual Studio, ASP.NET MVC, .NET, Microsoft SQL Server, Windows Communication Framework (WCF), ASP.NET, Obfuscation, Visual Studio Extensibility, C#PhD Student
2006 - 2006Saint-Petersburg State University- Developed the software system for a PhD paper on structural geology titled "Automation of Cross Section Building through the Thrust Systems Foreland."
Technologies: WinForms, Windows GDI+, C#Team Lead, .NET Developer
2005 - 2005Bridge-Quest- Led projects involving the customization of web services.
- Developed .NET software using ASP Classic, ASP.NET (WebForms), HTA, and .NET WinForms.
Technologies: Visual Studio, Perforce, Visual SourceSafe, Microsoft SQL Server, NAnt, NUnit, Web Services, CSS, HTML, JavaScript, VBScript, ASP, XPath, XSLT, XML, C#, ASP.NETSoftware .NET Developer
2004 - 2005StarSoft Development Labs- Worked as a member of the eXP (eXtreme Programming) team.
- Participated in several ASP.NET (WebForms) projects for client intranets.
Technologies: CSS, HTML, XPath, XSLT, XML, JavaScript, CruiseControl, NAnt, NUnit, Microsoft SQL Server, ASP.NET Web Forms, C#Software .NET Developer
2003 - 2004STEP Technologies- Helped develop a client-server system for handling automated document translation, incorporating interconnected WinForms and Web Parts.
Technologies: NUnit, Microsoft Access, Microsoft SQL Server, XCeedComponents, NetAdvantageTM 2003, WinForms, C#Geological Engineer, Software Developer
2000 - 2001Lengiprotrans OJSC- Automated all scientific MS Excel-based calculations.
Technologies: Microsoft Access, Excel VBA, Visual Basic .NET (VB.NET)