Hire the Best .NET Core Developers in Toronto, ON

A software developer/team lead, you can rely on (20 years of experience, 40+ projects, 100-5000 man-hours each, leading dev teams up to size of 10). 15 ⭐⭐⭐⭐⭐ reviews also say something about my standards and consistency, and this is less than 3% of my total experience. Areas of expertise: ✔️ .NET/MS Web Stack; ✔️ JavaScript/React.js; ✔️ Cloud/DevOps/Azure; ✔️ Managing teams and all the related teamwork stuff. Aside from these main areas of activity, I know, and have done in past much more (CTRL+F the buzzwords section). ❔ Who am I? A highly-skilled software developer and team lead/product owner/CTO. ❔ What do I do? 1. I provide full application development cycle: starting with requirements gathering and ending with training and support. When needed, I mobilize additional specialists, up to project team size of 10, which is possibly outmatched only by the largest consulting and development companies. I have experience of being a CTO equivalent in a software company. 2. I provide training in Azure, DevOps, JavaScript, React.js, .NET Core, ASP.NET, Databases. ❔ What are the values? 1. Value. I strive to do not encourage initiatives, the value of which I don’t believe in. 2. Challenge. Solving difficult problems is what I enjoy the most. 3. Rationality. I see beauty in precise and minimal solutions. 4. Transparency and trust. I bet on mutually beneficial long-term cooperation and build it on the foundation of trust. I gladly explain any of my decisions. 👤 It's hard to maintain up to date profiles everywhere, my most detailed profile is on LinkedIn, please, ask me for the link. 🏆 I hold a dozen MS certificates, including multiple Azure certificates, and another dozen non-MS ones. Buzzwords for search engines and CTRL+F checks: Azure, Azure DevOps, C#, ASP.NET Core, .NET Core, React.js, Angular, SSR, JavaScript, JS, GitLab, Docker, Linux, Node.js, GraphQL, OWASP, SharePoint, Biztalk, Project Server, Commerce Server, .NET, Web Forms, MVC, ADO.NET, LINQ, Entity Framework, WCF, WF, SQL Server, Reporting Services, Analysis Services, IIS, Windows Server Active Directory, AD, NLB, PowerShell, HTML, HTML5, CSS, XML, UML, HTTP, SSL, Visual Studio, TFS, Git, Reflector, Resharper, Python, Django, Math, Statistics, AI, CS, Science, Scientific, compiler/parser building, Machine Learning, ANSI C, C++, Delphi, Win API, Linux, Ruby, PHP, gamification, knowledge management, hacker, superstar developer, geek, team lead, tech lead, project manager, PM, CTO for a project.

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Thanks for reviewing my profile. I’m a Senior Software Engineer with 7+ years of experience building reliable web applications, backend systems, and cloud-based products. I work mainly with C#, .NET, Angular, React, Next.js, JavaScript, TypeScript, Node.js, Python, SQL Server, Supabase, PostgreSQL, MongoDB and AWS. My background includes API development, microservices, performance improvements, CI/CD pipelines, and maintaining production systems used by growing teams and businesses. I’ve also worked as a tech lead, managing developers, reviewing code, and helping turn business requirements into practical, scalable solutions. I also have experience working with AI agents and MCP concepts, helping connect LLM-based workflows with real tools, APIs, and business logic in a structured way. I build reliable, scalable software that solves real problems. Whether it’s a new product, an existing platform, or a backend challenge, I focus on clean execution, strong quality, and dependable delivery. Let's build amazing things together!

I’m a Senior Full-Stack Developer with 12+ years of experience building secure, scalable web and enterprise applications using C#, .NET Core, React, SQL Server, and Azure. I specialize in designing and developing RESTful APIs, modern React frontends, and high-performance backend systems. I’ve worked extensively in healthcare and financial domains, including caregiver management systems, core banking platforms, and international money transfer solutions. What I Bring ✔️ C#, .NET Core / .NET 6+, ASP.NET Core Web API ✔️ React.js, TypeScript, modern frontend architecture ✔️ Entity Framework Core, Dapper, SQL Server (12+ years) ✔️ Azure (App Services, Functions, Storage, CI/CD pipelines) ✔️ OAuth2 / OpenID Connect, JWT, role-based authorization ✔️ Clean Architecture, SOLID principles ✔️ Performance optimization & production debugging ✔️ OpenAI API integration (chatbots, text processing, automation) ✔️ HIPAA-aware healthcare systems Recent Work Currently building a caregiver management platform for home health agencies, connecting caregivers and patients with secure, compliant workflows and third-party integrations (Zoho, Smartsheet, Jotform, HHAeXchange, etc.). Work Style Self-sufficient and proactive Clear communicator Comfortable owning features end-to-end Experienced with remote teams (US & international) Available in EST timezone with flexible overlap If you’re looking for someone who can step into your project, understand the architecture quickly, and deliver production-ready solutions — let’s connect.

✅ Past clients include multi-billion dollar international & domestic banks and many series A, B startups🏆 ✅ TOP RATED PLUS & Expert-Vetted on Upwork since 2017 (active on Upwork since 2015) 🏆 ✅ Consistently receives 5-star reviews ⭐⭐⭐⭐⭐ ✅ Recurring multiple clients for over five years 🏆 ✅ Holder of an Executive MBA 🎓 ✅ Adaptive Individual - Already building chatbots, fine-tuning models & doing Full stack LLM (Large Language Models) development. 💪🤖 Accelerate growth and innovation in your organization, whether you're nurturing a startup, scaling a medium-sized business, or enhancing an enterprise. Our Product Management, Development and Technical Leadership services are tailored to propel you towards your specific goals 🚀. Ready to take your business to the next level? Connect with us. Greetings, I am Arsalan, Software System Architect & Product Manager with the mindset of a seasoned CTO. Passionate about cost-effective enterprise empowerment, I combine a decade of software engineering expertise with business acumen. My track record showcases: ✅ A decade honing skills in the tech industry, leading teams on groundbreaking projects. ✅ Spearheaded a team of 95 professionals, overseeing applications with 2+ million registered users and 10,000+ daily active users. ✅ Collaborated on prominent projects like dale.com.co for Groupo Aval - one of the largest South American bank, winnerwinner.com for Playtertainment Inc, and a digital wallet for First Advantage which Silverline acquired. ✅ Key contributor to drawp.it and fluentbio.com, and collaborated closely with the esteemed data scientist, Michael Bhalitzanakis. As a Product Manager and System Architect, I bridge the gap between business and technology. My Executive MBA sharpens my understanding of business requirements, ensuring I deliver agile IT solutions aligned with corporate objectives. My areas of expertise include: 🚀 Team organization across web & mobile development, cloud infrastructure, UI/UX, and QA. 🚀 Comprehensive Product Management, from MVP design to development cycle oversight. 🚀 Business and Product Analysis, UI prototyping, and feature generation. 🚀 Expertise in System Architecture, including third-party integrations. 🚀 Data-driven decision-making, from data visualization to corporate Business Intelligence. 🚀 Agile Project Management, Scrum implementation, and team oversight. 🚀 Advanced proficiency in AI and Large Language Models (LLMs), specializing in building chatbots, fine-tuning models, and full-stack LLM development for innovative solutions. 🚀 Skilled in DevOps practices, fostering rapid, reliable, and efficient development and deployment pipelines. 🚀 AWS Certified Partner, demonstrating deep knowledge in leveraging Amazon Web Services for scalable, secure, and high-performance cloud solutions. 🚀 Certified Microservices Architect, with expertise in designing, implementing, and managing scalable and resilient microservices-based architectures. 🏗 Experienced LLMs : ProsusAI/finbert, meta-llama/Llama-2-7b I'm here to supercharge your business growth. As a catalyst propelling startups from Series A to industry dominance, my team and I prioritize speed, efficiency, and impactful results. Let’s leverage proven methodologies to redefine your business's trajectory. Ready for this transformative journey? Eagerly awaiting our collaboration. Let's connect. Best regards, Arsalan.

Full stack developer with more than 8 years of experience in website and web app development. As a programmer, I am proficient in various technologies and development tools. For front-end, I have experience with Angular, AngularJs, Ionic Framework, React/React Native, Flutter, and Electron. On the backend, I am skilled in C#, ASP.NET MVC, ASP.NET Core, GraphQL, Node, ExpressJS, and Core Java. I also know databases such as MSSQL, PostgreSQL, MYSQL, Firebase, Firestore, MongoDB, SQLite, and MS Access. Regarding development tools, I am familiar with IDEs like Visual Studio Code, Visual Studio 2019, Android Studio, Microsoft SQL Server Management Studio, and Postman. I have worked with Azure DevOps, Jira, Trello, Asana, and Basecamp for project management. I am proficient in repository management using GitHub, Gitlab, TortoiseSVN Git, GitExtension, and Bitbucket. With over 8 years of experience, I am a professional full-stack developer who has launched production-grade projects. I specialize in creating optimized architectures for various types of projects, including SPA and cross-platform full-stack apps. Throughout the entire software development cycle, from requirements gathering and planning to development, release, and maintenance, I possess the skills necessary to create actual working software from a conceptual idea. As a quick learner and problem solver in programming, computers, and mathematics, I am versatile and adaptable to any team or solo project role. I have experience managing teams, clients, development cycles, and coding. I value communication as a crucial tool for any successful project, and I prioritize getting requirements straight from clients to provide simple yet efficient solutions that satisfy their needs. My skills include application and requirement analysis, translating requirements to technical languages, integrating new features into existing projects, executing pixel and animation-perfect UIs, mentoring other developers in industry best practices, and taking the initiative to work independently with very little supervision. I am committed to delivering the highest quality of work and will not complete a project until the client is 100% satisfied. If you have an idea or a clear vision for your application and need assistance in turning it into a real-life product, please don't hesitate to contact me. I guarantee that I can help you, as your business is my business. If you have any questions about my qualifications or experience, please click the green "Invite to Job" button in the top right of your screen to discuss your project.