Hello, I am a full stack software developer, freelancing world wide. I apply SDLC, OOAD, SOLID and other software craftsmanship practices.. but not forget to use KISS principle. I’m experienced in creating web applications, web services, specializes in scalable, enterprise-level application development and engineering solutions for exceptionally high throughput. Over 10 years of experiences in technical consultant, and architect, specializes in full-stack, highly scalable, real-time data services, I have delivered top quality technical architecture, programming, testing and solutions for complex problems on-time and within budget.. I'm an Agile Kanban practitioner who loves to collaborate on development projects. Languages and Frameworks: .Net Core, C#, Nest js, Next js, Python, Node.js, Angular, ngRx, React, Redux, Mobx, Vue js, Knockout.js, Cordova , Express.js, Gulp.js, Mean Stack, ASP.Net MVC, C#, REST API, Grunt, Javascript, Jquery, HTML5, CSS, Bootstrap, Material Design, GraphQL , MongoDB, PostgreSQL, Test-driven Development (TDD), Software Architecture, SAAS, Microservices, Serverless, AWS, Azure Cloud Services, Azure Pipeline, CI/CD DevOps, Docker, Kubernetes. Highly skilled and experienced in: . Web User Interface, User Experienced modern design and implementation . Database creation, integration, and management . Using back-end frameworks to build server-side services, Web API, Restful service implemenetation and integration . Cloud server integration, especailly Azure . Content management system (CMS) development, deployment, and maintenance . Data analysis and reporting, visualization and business intelligent with Power BI . Architect .NET solutions. Well-versed in .NET frameworks, Web/Windows Services, and Team Foundation Servers, GIT . Gathering business requirements, completing key architecture design, and overseeing low-level and high-level design and documentation across the software development lifecycle. I'm working with agility, cooperation with trust and quality, experienced in Scrum Agile. I'm looking for long-term cooperation in freelancing work with you ! Thank you in advance for your time and consideration.

⭐ 100% Job Success | Top Rated I help businesses automate workflows, integrate systems, and build scalable SaaS platforms using .NET, React Microsoft Power Platform, and modern cloud architecture. If you're dealing with manual processes, disconnected tools, or a backend that doesn’t scale, I can help you turn that into a streamlined, automated, and reliable SAAS system. 🔹 What I Can Help You With: ✅ Workflow Automation (Power Automate / APIs) Automate approvals, notifications, data syncing, and repetitive operations across your tools ✅ Scalable Backend Development (.NET / ASP.NET Core) Build high-performance APIs and backend systems designed for growth ✅ SaaS Platform Development End-to-end development of multi-tenant SaaS applications with clean architecture ✅ System & API Integrations Connect CRMs, payment gateways, and third-party tools (Stripe, PayPal, HubSpot, etc.) ✅ Cloud Solutions (Microsoft Azure) Deploy secure, scalable systems using Azure Functions, Service Bus, and DevOps pipelines 🔹 Common Problems I Solve: - Manual workflows consuming hours of your team’s time - Systems that don’t talk to each other (CRM, payments, internal tools) - SaaS platforms struggling with performance or scalability - Complex business processes that need automation - Lack of structured backend architecture 🔹 Real Business Impact: - Automated workflows that save hours of manual work every week - Built scalable systems handling high-traffic production environments - Delivered SaaS platforms with clean, maintainable architecture - Seamless integrations across multiple business-critical tools 🔹 Why Clients Work With Me: ✔ I focus on business outcomes, not just code ✔ Strong communication with regular progress updates ✔ Ability to handle end-to-end development independently ✔ Experience building production-ready, scalable systems 🛠️ Tech Stack: - Backend: C#, .NET Core (.NET 6/7/8), ASP.NET Core, Entity Framework - Frontend: React, TypeScript, Next.js - Automation: Power Automate, REST APIs, Webhooks - Cloud: Microsoft Azure (Functions, Service Bus, DevOps) - Database: SQL Server, PostgreSQL - Tools: Docker, Git, CI/CD Pipelines 📩 Let’s Work Together If you're looking to automate operations, build a SaaS product, or integrate complex systems, send me a message.

I am a Microsoft Certified Full Stack Developer with over 14 years of experience building scalable AI-powered enterprise SaaS platforms, VoIP systems, POS solutions, Internal Dashboards, E-commerce, and MVP development. I specialize in solving complex business problems using modern full-stack technologies and real-world AI integrations and AI Coding. 𝐊𝐞𝐲 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞: 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤: .NET Core, ASP.NET, C#, Entity Framework, Blazor, Node.js, Python (Fast API), React, Angular, Next.js, TypeScript. 𝐀𝐈 & 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧: OpenAI, LLMs, AI Agents, Voice AI, Chatbot, RAG Systems, Workflow Automation. 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞: Multi-tenant SaaS, Microservices, REST APIs, Cloud (AWS/Azure), Third-party APIs like- Twilio, Stripe, etc. 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬: Healthcare IoT, Fintech, E-commerce, Telecommunication, HR, and others. I focus on clean architecture, long-term maintainability, and transparent communication. With a 100% Job Success Score and 16,000+ hours on Upwork, I deliver secure, high-performance solutions that drive product growth. Let’s discuss how I can help bring your project to life. Best regards, Harsh K.

I develop enterprise desktop and business applications using C#, WPF, WinForms, ASP.NET Core, Blazor, and SQL Server. I help businesses maintain, modernize, and extend internal software systems including warehouse tools, RFID tracking systems, reporting platforms, dashboards, and operational workflows. I work on both new development and existing enterprise applications with a focus on stable integrations, maintainable code, and long-term usability. ## What I deliver * WPF and WinForms desktop applications * Blazor and ASP.NET Core business systems * RFID and hardware device integrations * REST APIs and backend services * SQL Server design and query optimization * DevExpress and Telerik-based enterprise UI systems * Reporting dashboards and operational tools ## Proof of work * 1000+ hours on long-term .NET projects * Built multi-tenant Blazor business systems * Delivered Zebra FX7500 RFID tracking integrations * Developed enterprise desktop and warehouse automation tools * Multiple 5-star client reviews ## Tech stack * C#, .NET, ASP.NET Core, Blazor * WPF, WinForms * Entity Framework, LINQ, SQL Server * DevExpress, Telerik * REST APIs and backend integrations ## Also experienced with * RFID systems and IoT integrations * Twilio IVR and automation workflows * Legacy application modernization Message me with your project details. *Keywords: ASP.NET Webform, VB.NET, ASP.NET Core, NETMUAI, C#, Blazor, Microservices, Azure, SQL Server, Web API, Angular, Docker, DevOps, Cloud Architecture, SSRS, Enterprise Applications, Legacy application, Stripe Integration, PayPal API, Payment Processing, Third-Party APIs*

I have a 14 years of experience in SharePoint On-Premise, SharePoint online (O365), InfoPath integration, Power Apps, SPFX components using React JS, Power Automate, Azure, Nintex Workflow/Form. Technology stack: SharePoint, Office365, Power Platform, SPFX, PNP, Azure, PowerShell, PowerApps; Power Automate; SharePoint custom Development; SharePoint Designer; ASP .NET, C#,ASP .NET Core ,MVC, Angular, jQuery; CSS; Nintex Forms; Nintex Workflow; SharePoint Designer Workflow; Migration Prep; SharePoint Administration. I am an expert in the custom development of SharePoint. I had used Workflows, Timer jobs, Event Receivers, Visual Web parts, and PowerShell scripts in SharePoint applications. Have enough skills in SPFX for the development of web parts, extensions, and customizations using React and JavaScript. I have integrated Power Apps with SharePoint. I am well versed in jQuery and CSS to enhance the look and feel and functionality of responsive client-side scripted web pages. I'm responsible for leading the Software Development Life Cycle, including analysis, design, development, and testing of Microsoft SharePoint applications.

Hi, do you need a reliable developer who can take your SaaS or Fintech product from concept to scalable, compliant, and high performing software? I specialize in building enterprise grade applications using .NET (C#), Angular/React, and cloud native architectures (Azure/AWS). My focus is not just writing code, it’s helping you create software that drives measurable business growth while meeting the highest standards of security and compliance. 🔹 What I Deliver • Scalable SaaS Platforms, built on microservices, API driven, and future ready. • Fintech & Enterprise Solutions, with strict adherence to ISO, GDPR, and HIPAA standards. • Cloud Native Development, leveraging Azure & AWS for cost efficiency, performance, and resilience. • End to End Ownership, from architecture and development to deployment, testing, and optimization. 🔹 Why Clients Choose Me • Business First Approach: I align technical solutions with your goals, ensuring ROI. • Proven Track Record: I’ve delivered SaaS platforms, secure fintech systems, and enterprise apps that are actively used by businesses today. • Transparent Communication: Clear updates, no jargon, and reliable timelines. • Quality & Trust: I treat every project like my own product, ensuring performance, security, and maintainability are built in from day one. 🔹 Let’s Build Something That Lasts Whether you need to launch a new SaaS, modernize legacy systems, or develop a secure fintech platform, I bring the expertise to make it happen, efficiently, securely, and at scale. ✅ 𝗥𝗲𝗮𝗰𝗵𝗶𝗻𝗴 𝘁𝗵𝗶𝘀 𝗽𝗼𝗶𝗻𝘁 𝘁𝗲𝗹𝗹𝘀 𝗺𝗲 𝗺𝘆 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝗵𝗮𝘀 𝘆𝗼𝘂𝗿 𝗮𝘁𝘁𝗲𝗻𝘁𝗶𝗼𝗻. 𝗜 𝐯𝐚𝐥𝐮𝐞 𝘆𝗼𝘂𝗿 𝘁𝗶𝗺𝗲, 𝗮𝗻𝗱 𝘁𝗵𝗲 𝐛𝐞𝐬𝐭 𝘄𝗮𝘆 𝗳𝗼𝗿𝘄𝗮𝗿𝗱 𝗶𝘀 𝗮 𝗳𝗼𝗰𝘂𝘀𝗲𝗱 𝗱𝗶𝘀𝗰𝘂𝘀𝘀𝗶𝗼𝗻 𝘁𝗼 𝗱𝗲𝗳𝗶𝗻𝗲 𝗱𝗶𝗿𝗲𝗰𝘁𝗶𝗼𝗻 𝗮𝗻𝗱 𝗺𝗼𝘃𝗲 𝗶𝗻𝘁𝗼 𝗮𝗰𝘁𝗶𝗼𝗻. 𝗔𝗽𝗽𝗿𝗲𝗰𝗶𝗮𝘁𝗲 𝘆𝗼𝘂𝗿 𝘁𝗶𝗺𝗲, 𝘀𝗽𝗲𝗮𝗸 𝘀𝗼𝗼𝗻. 𝐓𝐡𝐚𝐧𝐤 𝐲𝐨𝐮!

🎯 𝐈 𝐚𝐢𝐦 𝐭𝐨 𝐦𝐚𝐤𝐞 𝐲𝐨𝐮𝐫 𝐩𝐫𝐨𝐣𝐞𝐜𝐭 𝐭𝐡𝐞 𝐛𝐞𝐬𝐭 𝐢𝐭 𝐜𝐚𝐧 𝐛𝐞 𝐮𝐬𝐢𝐧𝐠 𝐦𝐲 .𝙉𝙀𝙏 / 𝘽𝙡𝙖𝙯𝙤𝙧 𝐤𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞! 🎓 I hold a Bachelor's 𝗱𝗲𝗴𝗿𝗲𝗲 𝗶𝗻 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 and a 𝗠𝗮𝘀𝘁𝗲𝗿'𝘀 𝗱𝗲𝗴𝗿𝗲𝗲 𝗶𝗻 𝗖𝗼𝗺𝗽𝘂𝘁𝗲𝗿 𝗦𝗰𝗶𝗲𝗻𝗰𝗲. Click the «𝐈𝐍𝐕𝐈𝐓𝐄» button. Let's get to business! 💼 𝗠𝗬 𝗖𝗢𝗥𝗘 𝗦𝗘𝗥𝗩𝗜𝗖𝗘𝗦: 🔧 Custom Blazor WebAssembly & Blazor Server apps — built from scratch or improved upon 🎨 Modern UI/UX using MudBlazor, Telerik, and other libraries 🔐 Authentication & Authorization (Azure AD, Identity, custom roles, etc.) 🤖 AI Integrations — GPT-4, Azure OpenAI, AI-powered chatbots, NLQ systems 🧠 Data visualization & reporting — dashboards, charts, integration with Telerik Reports and more 🚀 Migration to Blazor — from MVC, Razor Pages or WPF/WinForms. 🛠 Performance optimization — virtualization, caching, lazy loading 🌐 API Integration & Development — REST, GraphQL, AI, LLM 🧠 Tech Stack: C#, Java Script, .NET Framework 4.7+, .NET 8+, Blazor Server, Blazor WebAssembly, WebAPI, Entity Framework, Azure OpenAI, REST API, SignalR, SQL Server, MudBlazor, Telerik UI, Git, CI/CD, Identity, JWT, OAuth2, SQL Server, WebAPI, LINQ, Razor Components Let's get to business! 𝗖𝗹𝗶𝗰𝗸 𝘁𝗵𝗲 «𝗜𝗻𝘃𝗶𝘁𝗲» 𝗯𝘂𝘁𝘁𝗼𝗻 on the top right of this page to start our discussion. Best wishes, Oleksandr Kosovan. KEYWORDS: .NET Developer, C# Developer, Blazor Developer, Blazor WebAssembly, Blazor WebAssembly Developer, Blazor Server, Blazor Server Developer .NET Core, .NET Framework, WebAPI, C# Programming, ASP.NET Core, ASP.NET MVC, Web Development, Full Stack Developer, Blazor WebAssembly Expert, Blazor Server Expert, WebAPI Expert, Blazor Solutions, Blazor Applications, Frontend Development, Backend Development, Blazor UI, Web Frontend, HTML, CSS, Responsive Web Design, .NET Web Development, .NET MVC, Razor Pages, Blazor Components, MudBlazor, Telerik, Blazorise, .NET Developer, Modern Web Development, Single Page Applications (SPA), Progressive Web Apps (PWA), Web Development with Blazor, ASP.NET Core Blazor, JavaScript and Blazor, Responsive Design, .NET WebAPI Development, JavaScript, Full Stack .NET, Full Stack Blazor, REST API Development, Entity Framework, ASP.NET WebAPI, Blazor Framework, Blazor App Development, Web Services Development, Web App Development, Web Services API, Blazor Server-Side, Blazor Client-Side, Blazor for .NET, WebAPI Integration, Blazor with WebAPI, MVC Architecture, Server-Side Blazor, Client-Side Blazor, Web Frontend Development, JavaScript Integration, Frontend Reactivity, Web-Based Applications, C# APIs, Data Binding in Blazor, Blazor UI/UX, Blazor Navigation, WebAPI Integration Services, Blazor Routing, Entity Framework, C# API Development, JavaScript Optimization, .NET API Integration, Cloud Development with .NET, Blazor Integration, C# and Blazor, SQL Server Integration, Data Management in Blazor, Full Stack C#, Blazor CRUD Operations, Blazor Authentication, Blazor WebSocket, C# Middleware, .NET Application Development, Web App Security, .NET Development, Blazor Customization, Blazor Design Patterns, WebAPI Authentication, Blazor Performance Optimization, Blazor Debugging, JavaScript to Blazor Integration, JavaScript Components, .NET Web Solutions, Blazor Single Page Application, API Integration with Blazor, WebAPI Security, Blazor and JavaScript, .NET Deployment, Cross-Platform Apps, Blazor Web Components, Blazor and SQL, Blazor Custom Components, ASP.NET Core Blazor, Blazor Caching, Web Development with ASP.NET, Blazor Debugging and Troubleshooting, WebSocket API, WebAPI for Blazor Apps, Blazor , Blazor Authentication, Blazor Authorization, Blazor WebAssembly Authentication, Blazor WebAssembly Authorization, Blazor Server Authentication, Blazor Server Authorization, WebAPI Authentication, WebAPI Authorization, Custom Authentication in Blazor, Custom Authorization in Blazor, JWT Authentication, JWT Authorization, Blazor JWT Tokens, Bearer Token Authentication, Secure API with JWT, OAuth2.0 Authentication, OAuth2.0 Authorization, OAuth in Blazor, OAuth2.0 Blazor WebAssembly, OAuth2.0 Blazor Server, OAuth2.0 WebAPI Integration, OpenID Connect Blazor, OpenID Connect Authentication, OpenID Connect Authorization, Blazor WebAssembly OpenID Connect, Blazor Server OpenID Connect, Custom Token Authentication, ASP.NET Identity with Blazor, Google OAuth2.0 Login Blazor, Facebook Login Blazor, Microsoft Login Blazor, Role-Based Authorization Blazor, Policy-Based Authorization Blazor, Secure Blazor Pages, Blazor Login System, Authentication Flow in Blazor, Blazor WebAssembly Token Storage, Blazor AuthenticationStateProvider, Custom AuthenticationStateProvider, Custom Login Flow Blazor, Two-Factor Authentication Blazor, Blazor Authentication with Azure, Secure User Session in Blazor, Login with External Identity Provider, Client-Side Authentication in Blazor, Server-Side Authorization in Blazor

I help startups and enterprises build scalable, AI-powered software products using .NET and Microsoft Azure. With 14+ years of experience in enterprise software development, I specialize in designing and delivering cloud-native applications, SaaS platforms, microservices, and intelligent automation solutions that are secure, high-performing, and built to scale. My expertise combines modern AI capabilities with enterprise-grade software architecture. I actively leverage AI-assisted development tools and modern engineering practices to accelerate delivery, improve code quality, reduce production issues, and create maintainable systems that support long-term business growth. Core Expertise: ✔ AI & Intelligent Applications • LLM-powered SaaS platforms • AI chatbots with RAG and vector databases • Intelligent document processing • Workflow automation and business process optimization • Knowledge management and AI assistants ✔ .NET & Enterprise Architecture • ASP.NET Core, Web API, C# • Microservices and distributed systems • Multi-tenant SaaS architecture • Authentication, Authorization, OAuth, OpenID Connect, Azure AD • Real-time applications using SignalR • Secure, scalable enterprise platforms ✔ Microsoft Azure & Cloud Solutions • Azure App Services • Azure Functions • Azure Service Bus & Event-Driven Architecture • Azure SQL Database • Azure Storage & Key Vault • CI/CD and DevOps Automation • Cloud migration and modernization ✔ Databases & Performance Optimization • SQL Server • PostgreSQL • MySQL • MongoDB • Entity Framework Core & Dapper • Query tuning and database optimization • High-performance API design ✔ Modern Frontend Development • Blazor • Angular • Responsive and performance-focused user interfaces Over the years, I have worked with startups, SaaS companies, healthcare organizations, and enterprise clients to build reliable software solutions that solve complex business challenges. Whether you need an AI-powered application, a cloud-native SaaS platform, a modern .NET solution, or an enterprise architecture review, I can help transform your idea into a scalable and successful product. Let's build software that delivers measurable business value.

Senior Full-Stack Developer & Architect | $400K+ Earned on Upwork | 10+ Years Building Scalable Applications If you’re looking for a complete developer who can turn complex ideas into reliable, production-ready software, you’re in the right place. I'm a solution-driven individual. I love to help clients solve their most difficult problems, and bring their ideas into life. I deliver and architect high-performance Applications, APIs, eCommerce, AI-Driven Solutions used by businesses around the world. I’ve earned over $400K on Upwork, delivering projects that are scalable, fast, maintainable, and built to last. Clients work with me because I focus on solving business problems, not just writing code. Why you should hire me: -$400k+ earned on Upwork -Proven record of long-term client relationships -Strong problem-solving and architecture skills -Clear communication and reliable delivery -Experience across multiple industries and complex systems Whether you need a new app built from scratch, help scaling an existing application, or a developer who can jump into a complex codebase and deliver results. I’m ready to move fast. My services: -Architect applications end to end -Build robust backend systems using C#, Node.js / Next.js and ASP.NET Core -Develop modern, responsive frontends using React, Angular, and TypeScript -Create scalable APIs and real-time systems using SignalR and WebSockets -Develop cross-platform mobile apps with .NET MAUI for iOS and Android -Optimize and design databases using MSSQL, MySQL, or MongoDB -Automate testing and ensure quality with NUnit, Selenium, and Cypress -Build and customize eCommerce platforms such as BigCommerce, Shopify, and Volusion -Develop Cloud Based solutions using Azure or AWS -Migrate legacy apps to modern, fast, and robust technologies -AI Assisted Development using Claude and Codex Feel free to reach out to me for project discussion!

Full-Stack Developer with 11+ years of experience building scalable SaaS platforms, enterprise applications, cloud-based systems, APIs, and modern web applications. I help startups, SaaS companies, and enterprise businesses develop secure, high-performance, and scalable applications using .NET Core, React, Angular, Node.js, Azure, and AWS. 🥇 100% Job Success Score 🕐 9,200+ Upwork Hours ✅ 50+ Successfully Delivered Projects ✅ Long-Term Client Relationships ✅ Enterprise-Level Development Experience I specialize in designing and developing complete end-to-end solutions that are scalable, maintainable, and production-ready. 🏆 Expertise ✔ Full-Stack Web Applications ✔ SaaS Platforms ✔ Enterprise Systems ✔ REST APIs & Microservices ✔ Cloud Architecture & Deployment ✔ Dashboard & Admin Panel Development ✔ AI Integration & Automation ✔ Real-Time Applications ✔ External Service Integrations ✔ Performance Optimization Backend Technologies • C# • ASP.NET Core • .NET Core MVC • Web API • Node.js • Express.js • NestJS • Entity Framework • Microservices Architecture Frontend Technologies • React.js • Angular • Next.js • TypeScript • JavaScript • Redux • RxJS • HTML5 • CSS3 • Tailwind CSS • Bootstrap • Material UI • Ant Design • Angular Flex-Layout • Figma to HTML • Responsive Design • iOS, iPad & Material Design Compatibility • i18n Cloud & DevOps • Microsoft Azure • AWS • Azure DevOps • CI/CD Pipelines • Docker • Cloudflare • GitHub Actions Data Visualization & UI Components • AG Grid • Chart.js, D3.js • DevExpress • Telerik • Kendo UI • PrimeNG Database Technologies • MSSQL • PostgreSQL • MongoDB • MySQL • Redis AI & API Integrations • OpenAI API • Cursor AI • Claude AI • Gemini AI • Stripe • PayPal • Twilio • SendGrid • Google API • Payment Gateway Integrations Tools & Collaboration • JIRA, Trello, Asana, YouTrack • GitHub, Bitbucket Why Clients Work With Me • Clean and maintainable code • Strong communication and quick response • Business-focused development approach • Reliable delivery and deadline commitment • Long-term collaboration mindset • Startup and enterprise experience I focus on building high-quality applications that help businesses scale efficiently and improve user experience. Available for long-term contracts, SaaS development, enterprise systems, cloud applications, and AI-powered solutions. Let’s discuss your project and build something exceptional. Senior .NET Developer · Full Stack Developer · ASP.NET Core Developer · C# Developer · .NET Core Developer · .NET 8 · .NET 9 · ASP.NET Core Web API · REST API Developer · Microservices Developer · Azure Developer · Azure Cloud Engineer · Full Stack .NET Developer · Angular Developer · React Developer · React.js Developer · Angular 19 · React 19 · TypeScript Developer · C# · ASP.NET Core · Entity Framework Core · LINQ · SQL Server · PostgreSQL · Redis · RabbitMQ · Azure · Azure DevOps · Azure Functions · Docker · Kubernetes · GitHub Actions · CI/CD · Web API · RESTful Services · Microservices Architecture · Event-Driven Architecture · Distributed Systems · Clean Architecture · SOLID Principles · Design Patterns · Repository Pattern · Unit of Work · JWT Authentication · OAuth 2.0 · OpenID Connect · SignalR · gRPC · OpenTelemetry · Serilog · Elasticsearch · Angular · Angular Material · PrimeNG · RxJS · NgRx · TypeScript · JavaScript · HTML5 · CSS3 · SCSS · Bootstrap · Tailwind CSS · Responsive Design · React.js · Next.js · Redux Toolkit · TanStack Query · Context API · Hooks · Material UI · GraphQL · SPA Development · Unit Testing · xUnit · NUnit · Jest · React Testing Library · Agile Scrum · Secure Coding · Scalable Applications · Cloud-Native Applications