Sergey is available for hire
Hire SergeySergey Zwezdin
Verified Expert in Engineering
Full-stack Developer
Saint Petersburg, Russia
Toptal member since February 18, 2022
Bio
Sergey has worked as a professional full-stack web developer since 2004. The primary framework he loves using to develop software is .NET/React, and he prefers using the Agile and Scrum methodologies as a base for the development process. Passionate about software development, Sergey is eager to take on more challenging projects to build excellent applications that help people.
Portfolio
Troppus IT & Management
.NET, ASP.NET, Blazor, Less, Bootstrap, Entity Framework, SQL Server BI, Azure...
Actsoft Inc.
React, .NET, ASP.NET, TypeScript, Create React App, Material UI, Redux...
Actsoft
.NET, React, JavaScript, SQL, Azure App Service, C#, .NET Core, Microservices...
Experience
- .NET - 18 years
- GitHub - 10 years
- Entity Framework - 10 years
- Azure - 7 years
- React - 7 years
- TypeScript - 6 years
- Docker - 5 years
- Next.js - 3 years
Work Experience
Senior Full-stack Developer
2021 - 2022
Troppus IT & Management
- Gathered, analyzed, and defined application requirements based on customer needs.
- Developed ready-to-use solution that meets customers' requirements.
- Researched and provided solutions for high-performance algorithms for critical parts of the application.
Technologies: .NET, ASP.NET, Blazor, Less, Bootstrap, Entity Framework, SQL Server BI, Azure, xUnit, Azure DevOps, Git, Node.js, REST APIs, MacOS, Product Development, Architecture, Project Management, Technical Leadership, Full-stack, Swagger, APIs, Back-end, Databases, Leadership, Front-end Development, NestJS, UI Design, Software Design, Startups, ASP.NET MVC, API Integration, Dashboards, Component Libraries, UI Libraries, Front-end Architecture, Web Design, JavaScript Charting, SignalR, Azure Websites, Azure SQL Databases, Web API, CI/CD Pipelines, Unit Testing, C#.NET, Full-stack Development, Azure Functions, Vercel, Large Language Models (LLMs), Claude, DevOps, Web Development, MVP Design, Supabase, Agentic AI, JSON, Microsoft Azure, Azure Application Insights, Azure Blog Storage, Go, Distributed Systems, Third-party APIs, Back-end Development, Identity & Access Management (IAM), Multi-tenant SaaS
Senior Full-stack Developer
2017 - 2021
Actsoft Inc.
- Developed the multi-tier high-load application for customers from different countries worldwide.
- Implemented features and fixed bugs as part of the agile software development process.
- Established a unit testing process for a React-based application.
Technologies: React, .NET, ASP.NET, TypeScript, Create React App, Material UI, Redux, Redux-Saga, Jest, Entity Framework, Microsoft SQL Server, Azure Cosmos DB, Azure, Azure Service Bus, NUnit, Azure DevOps, Git, REST APIs, Electron, MacOS, Product Development, Mobile Development, Architecture, Project Management, Technical Leadership, Full-stack, Automated Testing, Storybook, Swagger, APIs, Back-end, Databases, Leadership, Front-end Development, UI Design, Software Design, Startups, ASP.NET MVC, API Integration, UX Design, CSV, Dashboards, Component Libraries, UI Libraries, Front-end Architecture, Web Design, Graphic Design, JavaScript Charting, SignalR, Azure Websites, Azure SQL Databases, Web API, Hugo, CI/CD Pipelines, Unit Testing, C#.NET, Full-stack Development, Web Development, JSON, Microsoft Azure, Azure Application Insights, Azure Blog Storage, Go, Distributed Systems, Third-party APIs, Back-end Development, Identity & Access Management (IAM), Multi-tenant SaaS
Full-stack Software Developer
2017 - 2021
Actsoft
- Developed the multi-tier high-load application for customers from different countries worldwide.
- Implemented features and fixed bugs as part of the Agile software development process.
- Established a unit testing process for a React-based application.
Technologies: .NET, React, JavaScript, SQL, Azure App Service, C#, .NET Core, Microservices, HTML, CSS, Atomic Design, UI Components, Node.js, User Interface (UI), Figma, Jest, QA Testing, Cypress, Flux Architecture, Full-stack, Amazon Web Services (AWS), HTML5, Git, NPM, Software Engineering, Front-end, Agile, GraphQL, Tailwind CSS, Apollo, REST APIs, Electron, MacOS, Product Development, Mobile Development, Architecture, Project Management, Technical Leadership, Automated Testing, Storybook, Swagger, APIs, Back-end, Databases, Leadership, Front-end Development, UI Design, Software Design, ASP.NET MVC, API Integration, UX Design, CSV, Dashboards, Graphs, Data Visualization, Component Libraries, UI Libraries, Front-end Architecture, MDBootstrap, JavaScript Charting, SignalR, Azure Websites, Azure SQL Databases, Web API, CI/CD Pipelines, Unit Testing, C#.NET, Full-stack Development, JSON, Go, Distributed Systems, Third-party APIs, Back-end Development, Identity & Access Management (IAM), Multi-tenant SaaS
Senior Full-stack Developer
2015 - 2017
ServiceTitan
- Improved a mobile app core to use a faster and more reliable web-engine.
- Participated in designing, planning, and developing application features.
- Improved existing functionality by working together with product experts.
Technologies: .NET, ASP.NET, Cordova, React, Material UI, Jira, GitHub, Amazon Web Services (AWS), Azure, Amazon Route 53, TeamCity, Windows PowerShell, REST APIs, Electron, Product Development, React Native, Mobile Development, Architecture, Project Management, Technical Leadership, Express.js, Full-stack, Automated Testing, Storybook, Swagger, APIs, Back-end, Databases, Leadership, Expo, Front-end Development, UI Design, Cross-platform App Development, Android, iOS, ASP.NET MVC, API Integration, UX Design, CSV, Dashboards, Graphs, Data Visualization, Component Libraries, Front-end Architecture, AWS Lambda, Web Design, JavaScript Charting, SignalR, Azure Websites, Azure SQL Databases, Web API, CI/CD Pipelines, Unit Testing, C#.NET, Full-stack Development, JSON, Back-end Development
Head of Development
2014 - 2015
CodeFirst
- Set up the development process to handle the developer team.
- Designed the architecture for high-scale projects for company customers.
- Improved the release management process to get the product on time.
Technologies: .NET, ASP.NET, Knockout (Knockout.js), Angular, Kendo UI, Microsoft SQL Server, xUnit, Azure, Azure DevOps, Git, REST APIs, Product Development, Mobile Development, Architecture, Project Management, CTO, Technical Leadership, CQRS, Full-stack, Automated Testing, Storybook, Swagger, APIs, SEO Tools, Back-end, Databases, Leadership, Expo, Front-end Development, UI Design, Software Design, ASP.NET MVC, API Integration, UX Design, CSV, Front-end Architecture, JavaScript Charting, SignalR, Azure Websites, Azure SQL Databases, Web API, CI/CD Pipelines, Unit Testing, C#.NET, Content Management Systems (CMS), Full-stack Development, Back-end Development
Senior Full-stack Developer
2011 - 2014
MSI UK
- Designed the architectural solution to develop reusable Silverlight components.
- Designed and developed an onboarding system to simplify the registration process with a step-by-step wizard.
- Improved visual representation and performance of the reporting system.
- Covered existing and new business logic with unit tests.
Technologies: .NET, ASP.NET, Microsoft Silverlight, Microsoft SQL Server, xUnit, Azure DevOps, Git, REST APIs, Product Development, Mobile Development, Architecture, Project Management, Technical Leadership, CQRS, Full-stack, APIs, Back-end, Databases, Leadership, Front-end Development, UI Design, Software Design, ASP.NET MVC, API Integration, Front-end Architecture, JavaScript Charting, SignalR, Azure Websites, Azure SQL Databases, Web API, CI/CD Pipelines, Unit Testing, C#.NET, Full-stack Development
Senior Full-stack Developer
2009 - 2011
Oogway
- Designed the software architecture to integrate the WPF application with a low-level 3D engine.
- Developed a high-performance 3D-visualization software that visualizes buildings for real estate developers.
- Maintained backlog to handle actual customer requirements.
Technologies: Microsoft Silverlight, Windows Presentation Foundation (WPF), Microsoft SQL Server, NUnit, Git, Bitbucket, .NET, ASP.NET, REST APIs, Product Development, Architecture, Project Management, CTO, Technical Leadership, CQRS, Full-stack, APIs, Back-end, Databases, Leadership, Front-end Development, UI Design, Software Design, API Integration, Front-end Architecture, SignalR, Web API, C#.NET, Full-stack Development
Head of Development
2003 - 2009
NeoConcept
- Managed the development team as head of development.
- Defined the company-wide development framework to ensure a faster development process.
- Participated in all company releases as a technical lead.
Technologies: Windows Presentation Foundation (WPF), ClickOnce, Entity Framework, Microsoft SQL Server, NUnit, xUnit, TFS, Git, .NET, ASP.NET, REST APIs, Product Development, Architecture, Project Management, CTO, Technical Leadership, CQRS, Full-stack, APIs, Back-end, Databases, Leadership, UI Design, Software Design, API Integration, Front-end Architecture, Web API, C#.NET, Full-stack Development, Digital Kiosks
Project History
PixelGrid
https://pixelgrid.zwezdin.com/This npm package and browser extension add a grid over the website's layout. It is useful when the aim of web development is to create a first-class pixel-perfect page layout in a web aligned with the designer's grid.
Yandex Cloud Function Router
https://github.com/sergeyzwezdin/yandex-cloud-functions-routerThis router, based on Node.js, enables running the Node.js code in the Yandex Serverless infrastructure. It's an open-source project that allows handling all types of events for a serverless application hosted in Yandex Cloud.
Magic Chunks
https://github.com/magic-chunksMagic Chunks is a .NET library that allows you to modify the configuration files. It is useful to use tools like this during automated CI builds. It has a convenient API as well as providers for the most helpful build tools, such as Microsoft Build, CAKE, PowerShell, and others. It is also implemented as an Azure DevOps extension to integrate it in a build pipeline as a build step.
MongoDB Support for Hangfire
https://github.com/Hangfire-Mongo/Hangfire.MongoThis is a Mongo database provider for the Hangfire project. It allows using MongoDB as storage while working with Hangfire tasks. It is useful for projects without SQL Server or any other supported storage as part of their infrastructure. While I do not maintain it actively, I initially started the project and promoted it in the community. For now, it is a community-driven project.
Enterprise Tool to Manage the Company's Resources
Web-based internal tool plan and schedule overhaul work for the company equipment. My responsibilities included working with a team as a software development engineer, designing application architecture, and delivering fully-functional solutions for end customers.
Azure Security Analytics System
Web-based dashboard to analyze Azure security activities for the enterprise.
My responsibilities included working with a team as a software development engineer, designing application architecture, and delivering a fully-functional solution for end customers.
My responsibilities included working with a team as a software development engineer, designing application architecture, and delivering a fully-functional solution for end customers.
Two-factor-based Authentication System for Teams
Web solution for two-factor authentication based on OTP code designed to use across the team. My responsibilities included working with a team as a software development engineer, designing application architecture, and delivering a fully-functional solution for end customers.
Food marketplace
ECommerce platform for a specialized marketplace in the food industry.
My responsibilities included working with a team as a software development engineer, designing application architecture, and delivering a fully-functional solution for end customers.
My responsibilities included working with a team as a software development engineer, designing application architecture, and delivering a fully-functional solution for end customers.
Secured Email Client
Modern web-based email client with end-to-end encryption. My responsibilities included working with a team as a software development engineer, designing application architecture, and delivering a fully-functional solution for end customers.
IoT-devices Management System
Complex system to manage a network of IoT devices across large industrial companies. It allows the management of device information, location, and maintenance information. My responsibilities included working with a team as a software development engineer, designing application architecture, and delivering a fully-functional solution for end customers.
Automation of Car Traffic Based on RFID Tags
Cross-platform desktop utility based on an Avalonia UI that handles the business workflow of fleet management based on RFID tags. My responsibilities included working as a software development engineer, designing application architecture, and delivering a fully-functional solution for end customers.
Online Scrum Planning Poker
An online planning poker app that helps agile project teams estimate projects on a consensus-based, gamified technique called Planning Poker. My responsibilities included team management, solution architecture, setting up and managing the development process, software development, and release management.
Online Platform for GSM Network Management
Planning and performance tools to manage, plan and implement networks, improving costs and enhancing customers' quality or experience in the most efficient fashion possible. My responsibilities included working with a team as a software development engineer, design application architecture, and delivering a fully-functional solution for end customers.
3D-visualization Platform | Real Estate Development Company
Silverlight 3D plugin that integrates into real estate developer websites to show 3D models of buildings and their parts. Allows customers to get detailed information regarding buildings and their parts.
Software Platform for Viewing 3D Models
An innovative product that allows viewing 3D models and provides its user with integrated additional content, such as video guides. 3D models are used for demonstration, advertising, and educational purposes. My responsibilities included working with a team to build a WPF client that integrates with the native 3D engine.
Online Management System for Realtors
Startup in the real estate area that allows growing individual realtors and real estate companies by involving innovative high-tech technologies in business processes. My responsibilities included team management, solution architecture, setting up and managing the development process, software development, and release management.
Interactive Kiosk Software | Reseller of Electronic Components
ASP.NET-based interactive kiosk software that allows for simplifying the shopping process in a chain store. My responsibilities included team management, solution architecture, setting up and managing the development process, software development, and release management.
Education
2007 - 2011
Postgraduate Student in Computer Science
South Ural State University - Chelyabinsk, Russia
2002 - 2007
Master's Degree in Computer Science
South Ural State University - Chelyabinsk, Russia
Certifications
DECEMBER 2021 - DECEMBER 2022
Microsoft Azure Developer Associate
Microsoft
JUNE 2012 - JULY 2014
Microsoft Certified Solution Developer
Microsoft
JUNE 2009 - DECEMBER 2016
Microsoft Regional Director
Microsoft
JUNE 2008 - DECEMBER 2016
Microsoft Most Valuable Professional
Microsoft
Skills
Libraries/APIs
React, Entity Framework, Node.js, REST APIs, JavaScript Charting, SignalR, Web API, Twilio API, Stripe, MDBootstrap, Redux-Saga, OvermindJS
Tools
GitHub, GitHub Pages, Figma, Git, NPM, Azure App Service, Claude, Azure Application Insights, xUnit, TFS, Microsoft Silverlight, Bitbucket, Jira, TeamCity, Create React App, SQL Server BI, RabbitMQ, Expo
Languages
TypeScript, HTML, CSS, JavaScript, Sass, Less, HTML5, C#, Hugo, C#.NET, ECMAScript (ES6), Go, SQL, GraphQL
Frameworks
.NET, Next.js, Tailwind CSS, Electron, Redux, .NET Core, ASP.NET, Material UI, Swagger, ASP.NET MVC, React Native, Jest, Cypress, Express.js, NestJS, Windows Presentation Foundation (WPF), NUnit, Knockout (Knockout.js), Angular, Kendo UI, Windows PowerShell, Blazor, Bootstrap, Avalonia
Paradigms
Azure DevOps, Agile Software Development, Agile, Unit Testing, DevOps, Microservices, Mobile Development, CQRS, Automated Testing, UI Design, UX Design, Microfrontends
Platforms
MacOS, Docker, Azure, Kubernetes, Amazon Web Services (AWS), Twilio, Android, iOS, AWS Lambda, Azure Functions, Vercel, Yandex Cloud, Firebase
Industry Expertise
Project Management, Web Design
Storage
Azure Websites, Azure SQL Databases, JSON, PostgreSQL, Microsoft SQL Server, MongoDB, Databases, Azure Cosmos DB
Other
Software Development, Blogs, Documentation, Technical Writing, Software, Software Design, Software Deployment, Web Development, User Interface (UI), UI Components, Flux Architecture, Full-stack, Software Engineering, Front-end, Product Development, Architecture, CTO, Technical Leadership, Design Systems, Storybook, APIs, Server-side Rendering (SSR), Back-end, Leadership, Front-end Development, Cross-platform App Development, API Integration, CSV, Dashboards, Graphs, Data Visualization, Component Libraries, UI Libraries, Front-end Architecture, Graphic Design, Serverless, CI/CD Pipelines, Content Management Systems (CMS), Full-stack Development, MVP Design, Agentic AI, Distributed Systems, Third-party APIs, Back-end Development, Identity & Access Management (IAM), Multi-tenant SaaS, GitOps, Mobile App Development, Chrome Extensions, Atomic Design, QA Testing, SEO Tools, User Experience (UX), Startups, Digital Kiosks, Large Language Models (LLMs), Supabase, Microsoft Azure, Azure Blog Storage, Browsers, Apollo, Computer Science, ClickOnce, Cordova, Amazon Route 53, Azure Service Bus, Microsoft Certified Professional Developer (MCPD), TCP/IP, NextAuth.js
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