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Hi, I'm Keelan Harris, a Full Stack Developer with over 16 years of experience building scalable and secure applications using a variety of technologies like .NET, React, Angular, and Azure. I have a passion for creating modern web platforms and robust APIs, and I enjoy integrating third-party services to enhance functionality. My expertise includes cloud services and DevOps, ensuring that applications perform efficiently and reliably. I am dedicated to writing clean, maintainable code and following best practices in security and architecture. I take pride in delivering solutions that improve user engagement and system availability. When I'm not coding, I enjoy staying up to date with new technologies and continuously improving my skills to deliver the best results for my clients and teams.…Hi, I'm Keelan Harris, a Full Stack Developer with over 16 years of experience building scalable and secure applications using a variety of technologies like .NET, React, Angular, and Azure. I have a passion for creating modern web platforms and robust APIs, and I enjoy integrating third-party services to enhance functionality. My expertise includes cloud services and DevOps, ensuring that applications perform efficiently and reliably. I am dedicated to writing clean, maintainable code and following best practices in security and architecture. I take pride in delivering solutions that improve user engagement and system availability. When I'm not coding, I enjoy staying up to date with new technologies and continuously improving my skills to deliver the best results for my clients and teams.

Keelan Harris

Full Stack Developer, Developer, Programmer, +3

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Hi, I'm Keelan Harris, a Full Stack Developer with over 16 years of experience building scalable and secure applications using a variety of technologies like .NET, React, Angular, and Azure. I have a passion for creating modern web platforms and robust APIs, and I enjoy integrating third-party services to enhance functionality. My expertise includes cloud services and DevOps, ensuring that applications perform efficiently and reliably. I am dedicated to writing clean, maintainable code and following best practices in security and architecture. I take pride in delivering solutions that improve user engagement and system availability. When I'm not coding, I enjoy staying up to date with new technologies and continuously improving my skills to deliver the best results for my clients and teams.…Hi, I'm Keelan Harris, a Full Stack Developer with over 16 years of experience building scalable and secure applications using a variety of technologies like .NET, React, Angular, and Azure. I have a passion for creating modern web platforms and robust APIs, and I enjoy integrating third-party services to enhance functionality. My expertise includes cloud services and DevOps, ensuring that applications perform efficiently and reliably. I am dedicated to writing clean, maintainable code and following best practices in security and architecture. I take pride in delivering solutions that improve user engagement and system availability. When I'm not coding, I enjoy staying up to date with new technologies and continuously improving my skills to deliver the best results for my clients and teams.

Available to hire

Hi, I’m Keelan Harris, a Full Stack Developer with over 16 years of experience building scalable and secure applications using a variety of technologies like .NET, React, Angular, and Azure. I have a passion for creating modern web platforms and robust APIs, and I enjoy integrating third-party services to enhance functionality. My expertise includes cloud services and DevOps, ensuring that applications perform efficiently and reliably.

I am dedicated to writing clean, maintainable code and following best practices in security and architecture. I take pride in delivering solutions that improve user engagement and system availability. When I’m not coding, I enjoy staying up to date with new technologies and continuously improving my skills to deliver the best results for my clients and teams.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Lead Developer at MANEK US

March 1, 2025 - July 30, 2025

Spearheaded the development of scalable, high-performance web applications using Blazor WebAssembly, .NET 7, and ASP.NET Core serving 20,000+ users with fast response times. Designed RESTful APIs and improved third-party integration speed. Built responsive frontends with React, Redux, and Tailwind CSS, enhancing user engagement. Implemented secure authentication flows with Azure Active Directory and integrated Stripe for payment processing, handling significant monthly transactions. Used Azure Blob Storage to optimize document storage and microservices for high availability. Enhanced security with MFA and best practices, led adoption of Dependency Injection and clean architecture, boosting code quality and test coverage.

Senior .NET Full Stack Developer at TETRA TECH US

April 1, 2022 - July 30, 2025

Designed multi-tenant applications for real estate and media services supporting 60,000+ monthly users. Developed RESTful APIs with OpenAPI and built video processing workflows with Azure Media Services, reducing upload-to-live time by 70%. Integrated Microsoft Graph API for automation and built rich UIs using Angular, Blazor, and TypeScript. Utilized hybrid databases including MongoDB and Azure Cosmos DB. Developed messaging systems using Azure Service Bus and RabbitMQ and implemented CQRS/Mediator patterns for maintainability. Maintained logging and telemetry and handled secure media storage across cloud platforms. Managed code versioning and CI/CD pipelines to achieve weekly deployments.

Technical Co-Founder at INSPIRE TECHNOLOGY US

December 31, 2018 - July 30, 2025

Designed and maintained an Applicant Tracking System using ASP.NET, C#, and Entity Framework to streamline candidate management. Built backend REST APIs and implemented data-driven user interfaces with React and Redux. Optimized SQL Server queries and supported 1,000+ concurrent users. Integrated JSON-based APIs for third-party services and maintained test coverage to ensure reliable CI/CD deployments.

Senior .NET Developer at PACER US

November 1, 2017 - July 30, 2025

Developed scalable applications using ASP.NET Web API and C# supporting 5,000+ daily transactions. Created RESTful APIs and WCF services for data exchange. Automated background jobs with Quartz.NET and optimized POS systems. Implemented document workflows with OpenXML and integrated secure payment gateways. Enhanced UI with jQuery and Razor views and improved document processing using OCR. Maintained code quality with NUnit testing and NHibernate ORM and contributed to CI/CD pipelines.

.NET Developer at TYMESHORT US

April 1, 2010 - July 30, 2025

Developed enterprise-grade web applications with ASP.NET MVC, Web Forms, supporting 10,000+ monthly users. Built WCF services to improve data synchronization and designed backend systems with Windows Services. Created efficient T-SQL queries and data-driven dashboards using Datalux. Migrated legacy ActionScript code to modern web standards and built responsive dynamic web interfaces.

Lead Developer at MANEK US

March 1, 2025 - July 30, 2025

Spearheaded the development of scalable web applications using Blazor WebAssembly, .NET 7, and ASP.NET Core for over 20,000 users with fast response times. Designed RESTful APIs with NSwag/OpenAPI to speed up integrations. Built responsive frontends using React, Redux, TypeScript, and Tailwind CSS, significantly improving load times and user engagement. Implemented secure authentication with Azure AD and Azure AD Graph API, supporting enterprise SSO and reducing unauthorized access. Integrated Stripe for recurring billing and handled high-volume transactions efficiently. Migrated storage to Azure Blob Storage, improving latency and reducing costs. Developed microservices with Azure Functions and Service Bus, achieving high system availability. Applied best practices in security with MFA, token-based auth, and HTTPS-only traffic, resulting in zero critical vulnerabilities. Promoted clean architecture and Dependency Injection to improve code quality and test coverage.

Senior .NET Full Stack Developer at TETRA TECH US

April 1, 2022 - July 30, 2025

Designed and developed scalable multi-tenant applications for real estate and media services with ASP.NET Core, supporting 60,000 monthly active users. Created and maintained RESTful APIs with OpenAPI documentation. Developed video processing workflows using Azure Media Services, reducing live times by 70%. Integrated Microsoft Graph API and SendGrid for document sharing and email workflows. Delivered rich, responsive frontends using Angular, Blazor, TypeScript, and JavaScript. Integrated Google Maps and Fusion Tables for interactive property listings. Managed data access using Entity Framework, MongoDB, and Azure Cosmos DB. Developed asynchronous messaging pipelines with Azure Service Bus and RabbitMQ. Applied CQRS and Mediator pattern for maintainable code. Used Serilog for logging and telemetry to reduce issue resolution time. Supported secure media storage with AWS S3 and Azure Blob Storage. Led CI/CD pipelines for efficient weekly deployments.

Technical Co-Founder at INSPIRE TECHNOLOGY US

December 31, 2018 - July 30, 2025

Designed and maintained an Applicant Tracking System using ASP.NET, C#, and Entity Framework, enabling streamlined HR candidate management. Built backend services with ASP.NET Web API, ensuring high application uptime. Developed data-driven UIs using React and Redux to improve recruiter productivity. Applied OOP principles and optimized SQL queries, reducing load times. Developed and consumed JSON APIs for integrations with job boards and background check services. Created internal web services for HR automation and maintained test coverage to ensure reliable builds.

Senior .NET Developer at PACER US

November 1, 2017 - July 30, 2025

Developed and maintained scalable applications using ASP.NET Web API and C#, supporting over 5,000 daily transactions. Designed RESTful APIs and WCF services for internal and third-party integrations. Automated tasks with Quartz.NET background jobs for invoice generation and data synchronization with high reliability. Enhanced POS systems to improve transaction processing. Created document workflows using OpenXML, cutting manual reporting. Integrated secure payment gateways with PCI-DSS compliance. Delivered responsive UIs using jQuery and Razor. Applied OCR for faster document processing. Maintained code quality with NUnit testing and NHibernate ORM, supporting CI/CD pipelines for rapid deployments.

.NET Developer at TYMESHORT US

April 1, 2010 - July 30, 2025

Developed enterprise web applications with ASP.NET MVC, Web Forms, and C# supporting 10,000+ monthly users. Built and optimized WCF services to improve data synchronization. Developed backend systems and Windows Services to automate tasks. Engineered efficient data models and optimized T-SQL queries for financial dashboards. Modernized legacy code and reduced Flash dependency by migrating features to modern web standards. Developed dynamic web interfaces improving UI consistency and reducing support tickets. Streamlined deployment processes using Visual Studio and DevOps integration.