Hire the Best .NET Core Developers
in Australia

I have over 30 years’ experience in designing and developing software desktop/web solutions and commercial products. I understand the importance of time, money and the need for trust when outsourcing work. I will always work tirelessly to ensure deadlines are met with the highest quality outcomes. In addition to being an experienced full-stack desktop and web programmer in languages such as C#, C++, C, Rust, Golang, JavaScript, TypeScript, Python, R and even (some) Assembly, I am also skilled in creating desktop/web applications, web APIs and plug-ins for products such as Microsoft Office, Tableau and Python. My passion is in delivering practical and innovative solutions to business problems, through collaboration, clear thinking and software. No matter the size of your project, I will work tirelessly to design and build the solution needed to deliver the maximum value to your organisation.

I help businesses build, fix, and improve ASP.NET Core applications, Web APIs, and SQL Server databases. With 8+ years of .NET development experience, I can help with new applications, existing systems, API development, database optimization, debugging, RESTful APIs, SaaS platforms, fintech systems, ERP solutions, and enterprise software using Microsoft technologies and third-party integrations. As a full stack .Net developer, I specialize in: • C# .NET development • ASP.NET Core development • ASP.NET MVC architecture • .NET Framework applications • ASP.NET Web API development • RESTful API design and integration • Entity Framework and EF Core • LINQ and advanced C# programming • Microsoft SQL Server and SQL optimization • Database design and performance tuning • Azure cloud deployment • Azure App Services and Azure SQL • Azure DevOps and CI/CD pipelines • Blazor development • Angular and TypeScript integration • React JS integration • JavaScript, jQuery, HTML5, CSS3 • Microservices architecture using .NET Core • Authentication and Authorization (JWT, OAuth2, Identity) • Role-Based Access Control (RBAC) • SignalR real-time applications • Redis caching • Hangfire background jobs • Docker containerization • API integration (Twilio API, Payment APIs, Third-party APIs) I have delivered scalable .net developer solutions for: •Fintech applications •SaaS multi-tenant platforms •ERP systems •CRM systems •Healthcare software •E-commerce back-office systems •Enterprise automation platforms •Government and compliance systems My .net developer approach focuses on: • Clean architecture and SOLID principles • Scalable backend systems using ASP.NET Core • Optimized SQL Server queries and indexing • Secure Web API development • Cloud-ready deployment on Microsoft Azure • Maintainable and modular C# code • High-performance enterprise-grade applications Whether you need a backend .NET developer for ASP.NET Core Web API, a full stack .NET developer with React, Angular or Blazor, or a senior .NET developer for enterprise system architecture — I can help build secure, scalable, and production-ready solutions. If you are looking for a reliable, performance-focused, and experienced .NET developer, let’s build your next enterprise application.

I help mid-market companies automate business processes and build scalable cloud solutions using Microsoft Power Platform and Azure services. Recent projects: - Built enterprise agricultural ERP managing multi-farm operations, inventory, and dual distribution channels with real-time reporting (31+ reports) - Developed Power Apps solution for transportation/logistics with automated invoice workflows and Dynamics GP integration - Designed comprehensive authentication platform with passwordless FIDO2, multi-factor auth, and OAuth 2.0 provider capabilities - Created serverless email automation system using Azure Functions and Microsoft Graph API for real-time email processing and workflow triggers - Created Real Estate Lifecycle Management System using .NET 8, Blazor, and microservices architecture BUSINESS PROCESS AUTOMATION Power Apps (Canvas & Model-Driven), Power Automate, Dataverse, Power BI Custom workflows, approval processes, document automation CLOUD & DATA INTEGRATION Azure: Data Factory, Functions, Service Bus, API Management, Logic Apps, Databricks Data migration, ETL pipelines, microservices architecture, API development BACKEND DEVELOPMENT 24 years .NET experience: C#, .NET Core 8, ASP.NET, Web API, Entity Framework SQL Server, Oracle, MongoDB | Python, Node.js INDUSTRIES I SERVE ✓ Agriculture & Food Production (greenhouse operations, supply chain) ✓ Transportation & Logistics (fleet management, invoicing, operations) ✓ Real Estate (lifecycle management, property operations) ✓ Utilities (metering, ERP integration, power platform) ✓ Government (data migration, database optimization) WORKING WITH ME Based in Melbourne, Australia (AEST timezone) Available 30+ hours per week Fast turnaround on proposals and communication Fluent English Microsoft Certified: Azure Data Engineer, Power Platform App Maker

Looking for a developer who can build secure, scalable, and high-performing web solutions? You're in the right place. I help startups, small businesses, and growing companies transform their ideas into modern web applications and websites using ASP.NET, React, WordPress, Shopify, PHP, and OpenAI Codex as an AI-assisted development tool. Whether you need a custom business application, a responsive website, an eCommerce store, or ongoing maintenance, I focus on delivering solutions that are reliable, user-friendly, and built for long-term success. I use OpenAI Codex to streamline development workflows, accelerate implementation, and improve productivity while personally handling the architecture, customization, testing, optimization, and final delivery of every project. My goal is simple: develop clean, maintainable code that improves performance, enhances user experience, and supports your business growth. What I Can Do for You Custom Web Development ASP.NET (.NET Framework) ASP.NET Core .NET Core C++ PHP Custom Web Applications Business Portals Admin Dashboards REST API Integration Front-End Development React HTML5 CSS3 JavaScript Bootstrap Responsive UI Development Cross-Browser & Cross-Device Compatibility WordPress Development Custom WordPress Websites Elementor Development WooCommerce Development Kadence Theme & Kadence Blocks Theme & Plugin Customization Website Redesign Speed Optimization Website Maintenance AI-Assisted Development with OpenAI Codex* Shopify Development Shopify Store Development Theme Customization App Integration Store Setup Performance Optimization Store Maintenance Performance & Optimization Website Speed Optimization Core Web Vitals Improvements Technical SEO Best Practices Image Optimization Bug Fixing Security Improvements Why Work With Me? ✔️ Clean, scalable, and maintainable code ✔️ AI-assisted development using ,OpenAI Codex, for faster and more efficient delivery ✔️ Responsive, mobile-friendly, and SEO-ready websites ✔️ Strong attention to performance, security, and user experience ✔️ Clear communication and regular project updates ✔️ On-time delivery with a focus on quality ✔️ Long-term technical support and maintenance I believe successful projects are built through collaboration, transparency, and attention to detail. Every project is approached with the same commitment to quality, ensuring the final product meets both your business goals and your users' expectations. If you're looking for a dependable Full-Stack Web Developer to build, improve, or maintain your website or web application, feel free to send me a message. I'd be happy to discuss your project and help you find the best solution.

Hi, I am Muhammad Yasir Shaikh, a Senior Full Stack Developer with 15+ years of hands-on experience designing, developing, and scaling enterprise applications for public and private sector clients across Australia and the Middle East. ⚠️ New to Upwork, but not new to solving complex software challenges. I’ve architected and led high-impact platforms including the OnePort marine system for the NSW Government and delivered production-ready mobile apps, cloud solutions, and AI-powered POCs for teams across multiple industries. 🧠 What I Can Do for You: ✅Build secure, scalable web applications using .NET Core, Angular, and Azure ✅Optimize cloud deployments with CI/CD, Azure DevOps, Docker, and Kubernetes ✅Deliver cross-platform mobile apps using .NET MAUI and Xamarin ✅Integrate Generative AI and Azure OpenAI into existing business workflows ✅Lead projects end-to-end or plug into your existing team as a senior resource 🛠 Skills I Possess Programming Languages & Frameworks: C#, .NET Core, ASP.NET, .NET MAUI, Xamarin, JavaScript, TypeScript, Angular, React Cloud & DevOps: Microsoft Azure, Azure Functions, Azure DevOps, CI/CD Pipelines, Docker, Kubernetes, Microservices Architecture AI & Data: Generative AI, Azure OpenAI Services, Power BI, SQL Server Development Tools & Libraries: REST APIs, Web API, Tailwind CSS, Git, Agile (Scrum), TFS, JIRA Other Capabilities: Full Stack Development, Mobile App Development, Cloud Optimization, System Performance Tuning Let’s work together! I am confident I can bring enterprise-level results to your project — and to prove it, I am happy to connect.

320+ successful Upwork projects completed since 2013, with 20 plus years of software development, integration, automation, and business systems experience. I specialise in building reliable integrations between accounting systems, ERP platforms, ecommerce stores, print MIS systems, shipping providers, payment gateways, and custom business applications. My main focus is practical business automation: moving data correctly between systems, reducing manual work, fixing broken workflows, and building long term integration solutions that are stable, maintainable, and easy to support. Technical Skills • C#, VB.NET, PHP, Java • ASP.NET, .NET Core, Blazor, Angular, Bootstrap • REST API, GraphQL, SOAP, OData, Webhooks • XML, JSON, CSV, EDI style data processing • cXML, PunchOut, quote and purchase order workflows • SQL Server, MySQL, SQLite, PostgreSQL, NoSQL • Windows Services, Azure Functions, IIS • Azure Blob Storage, scheduled jobs, background workers • API authentication, OAuth, OAuth1, OAuth2, JWT, API keys • RPA and UI automation including UiPath • OCR, PDF automation, AI assisted document extraction • Data migration, data cleansing, mapping, validation, and reporting Accounting and ERP Integrations • QuickBooks Desktop SDK, qbXML, QuickBooks Web Connector, and QWC setup • QuickBooks Online API • Reckon Desktop, Reckon Hosted, Reckon One, and Reckon API integrations • Xero API, invoices, customers, payments, tracking categories • MYOB, Sage 50, Sage 200, Sage Intacct, FreshBooks • NetSuite REST, RESTlets, item lookup, invoice export, customer sync • Salesforce and custom CRM or ERP integrations • QuickBooks Online and Reckon One certified • Invoice import, sales order import, payment sync, remittance processing, customer matching, item mapping, tax handling, and reconciliation workflows Ecommerce and Marketplace Integrations • Shopify, WooCommerce, Magento, BigCommerce • Custom ecommerce middleware and plugins • Automated order import and export • Product, inventory, price, and customer synchronisation • WooCommerce to Reckon and accounting system workflows • Booking platform integrations including Airbnb, Booking dot com, and Agoda • Marketplace order processing and custom fulfilment workflows Print MIS, Manufacturing, and Procurement Integrations • printIQ API, OData API, webhooks, quote import, order import, and invoice export • Print MIS and manufacturing workflow automation • Coupa, Unimarket, and cXML PunchOut style workflows • Purchase order, quote approval, order acknowledgement, and supplier invoice flows • SmartSite, product configuration, simplified products, apparel, embellishment, and freight workflow support • Integration troubleshooting for print, manufacturing, and production environments Shipping and Logistics Integrations • ShipStation, Australia Post, UPS, TNT, Toll, OpenFreight, MachShip • Freight quoting, consignment creation, label generation, and tracking updates • Warehouse, dispatch, stock, and fulfilment workflow automation • Freight tracking links and order status update integrations Payment Gateway Integrations • Stripe, PayPal, Authorize.Net • eWAY, SecurePay, Braintree, BluePay • Commonwealth Bank, PayChoice, Windcave, and other payment providers • Paid order handling, invoice creation, payment posting, and transaction fee recording Cloud, DevOps, and Support • Azure, AWS • GitHub, Bitbucket, Azure DevOps • CI/CD pipelines • Docker and cloud deployment support • IIS hosting and Windows server based application deployment • Long term maintenance, monitoring, debugging, and integration support Other Experience • Custom desktop and web application development • AI assisted document processing workflows • Zapier and business process automation • Mobile development using Xamarin and Android Studio • iManage and GlobalX document system integrations • Legacy system integration and modern API middleware development • Complex data mapping between old and new systems • Business workflow analysis and automation design I work best on projects where the requirement is not just to write code, but to understand the business process, identify the right integration flow, handle edge cases, and deliver a solution that works reliably in real day to day operations. I can help with new integrations, fixing existing integrations, API troubleshooting, data migration, automation, reporting, and long term support.