• Was the first hired developer in the startup and built a team of for senior/lead full stack developers• Participated in planning the startup's roadmap and product line development, including mobile applications and web portals.• Migrated a legacy product as part of a development team to new technologies: AngularJS, Net and MS SQL Server. This enabled efficient and timely product development, allowing the startup to deliver products to clients faster and be more competitive.• Developed and maintained backend services using Visual FoxPro, ensuring seamless integration with the client's existing systems.• I used FoxPro OLE DB Provider for connecting .NET applications to FoxPro databases (.DBF files). It allows ADO.NET in .NET applications to interact with FoxPro data. We were able to extract billing data including pdf bills from customer's database.• Contributed to setting up the CI/CD pipeline, which accelerated the deployment process for products, web portals, backend services, database updates, and mobile applications. This automation streamlined the deployment process for both production and test environments, as well as staging. Additionally, deployments for numerous client companies were automated.• Together with a team of three developers, migrated products from on-premises hosting to AWS. This was done with zero downtime and was seamless for end users. As a result, hosting became more scalable and cost-effective, allowing for the deployment of products for several new client companies. The system handled hundreds of payments per second and sent out hundreds of emails and text messages.• Created and published mobile applications in all stores: Windows Mobile Store, Google Play Market, and iOS App Store. Managed updates of mobile applications to new versions.• Huge experience in payment processing: credit cards, ACH, IVR, cryptocurrency• Implemented AI chatbots accessible via Skype, Telegram, Facebook, and SMS channels.

• Participation in the development of a web-based diagram editor as a SPA application using AngularJS, integrated with a .NET backend.• Contributed to the development of a web tracker for storing meeting and conference data with the ability to save text and media files.• Developed an Offline Client for the official Russian government procurement website. The client was built by a team of three developers, closely collaborating with business analysis and testing teams. Designed as a Windows Forms desktop application with MS SQL Server Express, the client allowed users to store a large number of documents offline. In online mode, it featured synchronization procedures for directories and document uploads through web interfaces with the official procurement website.• Successfully addressed the challenge of integrating cryptographic systems for document signing (digital signatures and CryptoPro encryption systems).• The first version of the Offline Client was delivered on time, simplifying the workflow for users of the official Russian government procurement website, especially for clients with unstable internet connections.• Developed the web component of a portal for sales representatives. Utilized the DevExpress UI component library, as well as ASP.Net, JavaScript, and jQuery.• Developed an object storage system for a medical patient record storage project for medical institutions. Worked with MS SQL Server and Windows WMI technology. Backend services were implemented using .NET. This was for dbMotion which is still alive: https://www.alterahealth.com/solution/dbmotion/

• Designed and developed backend services and systems for a financial information portal, enabling seamless data processing, retrieval, and integration of market data, financial reports, and real-time analytics to serve end-users efficiently.• Developed robust backend services for a flight booking portal, optimizing the system for handling complex queries, managing flight data, and supporting secure online transactions, ultimately improving user experience and operational performance.• Implemented new features on Visual FoxPro project for bank application.• Worked on migration from Visual FoxPro to MS SQL Server and .Net solutions

• Participated in the design and development of a reference database on MS SQL Server. Wrote stored procedures. The database stored data on securities traded on global financial markets, as well as on public companies issuing these securities.• The database interface was implemented by me using stored procedures (MS SQL Server), partially rewritten based on the previous version of the database, allowing for information searches on public companies using company names or other data. The database also provided the ability to search for companies and stocks through cross-references of securities (CUSIP, ISIN, and other identifiers).• Designed and implemented backend services (WCF services) to provide access to the database for web portals, desktop applications, and background workers.• Developed a new version of the database loader for both historical (initial load) and incremental updates, using WWF technology. WWF blocks were implemented, enabling the graphical editor to modify and create workflows for the loaders. Previously, when adding a new feed or changing parameters of an existing one, manual coding of modules was required to load feeds (via FTP and other protocols) and then parse files and load them into the database using BCP or stored procedures. In the new version, corresponding blocks were added, guiding all steps: downloading files of various types from feeds, parsing data, and loading the data into the database. The changes I made significantly sped up and simplified the subsequent operation of the loaders. Adding new feeds or changing parameters of existing ones now took just a few hours, including testing, whereas it used to take much longer.• A new version of the admin site was implemented, allowing manual viewing of the database content and making edits if necessary.

• Development of backend services using C#, .Net, WCF, ADO.Net• Discussed interaction interfaces with the frontend team and the database team• Wrote stored procedures for MS SQL Server

• Having already acquired theoretical training in algorithms and data structures, as well as numerical modeling and data visualization using Pascal, Delphi, and Fortran during University studies, I completed training on the .NET platform and studied C#. Explored aspects of object-oriented programming (OOP), patterns related to OOP, and multithreading. Completed relevant practical exercises and final assignments.• Worked on numerous educational projects using C# and technologies such as WinForms, MS SQL, and ADO.Net.• Implemented educational web development projects using ASP.Net, HTML, CSS, and JavaScript.