Application Developer

Rosel John Candoy

Building thoughtful software for ~10 years — .NET, modern web, and AI/LLM.

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About

I'm an application developer with nearly a decade of experience designing and building web and desktop software. My curiosity for how things work goes back to my pre-teens, scripting in-game events in the Warcraft III World Editor. I move fast and adapt quickly — which has let me work across .NET (MVC, Web API, Blazor, WinUI3, MAUI), modern JavaScript (React, Angular, Vue), relational and document databases, and Microsoft Azure. Lately I build with Python and Flask, weaving AI/LLM tooling into my workflow to ship faster.

Skills

A decade across .NET, modern web, cloud, and AI/LLM.

  • .NETASP.NET · WebForms · MVC · Web API · Blazor · Razor Pages · WPF · WinUI3 · MAUI · Xamarin · XAML · XSLT
  • WebReact · Angular · Vue · jQuery · HTML · CSS · Tailwind CSS · Node.js · Flask
  • LanguagesC# · TypeScript · JavaScript · Python · Visual Basic
  • Azure / CloudApp Service · Azure Functions · Blob Storage · Communication Services · Application Insights · Edge CDN · AI Foundry
  • AI / LLMEmbeddings · Chat completions · RAG workflows · GitHub Copilot · Claude Code · Google Antigravity
  • DatabasesSQL Server · MySQL · MongoDB · Cosmos DB · Relational DBs · Document stores
  • IntegrationsConnectWise · Dynamics GP · Microsoft 365 · Microsoft Teams · Microsoft Graph · REST APIs

Experience

  1. 01 / 05Nov 2025Present

    Application Developer

    Exchange Technology Services · Winnipeg, Manitoba, Canada · Hybrid

    Current role — designing, building, and maintaining application software as part of a hybrid development team.

  2. 02 / 05Nov 2023Nov 2025

    AI & Cloud Solution Developer

    Clear Concepts · Winnipeg, Manitoba, Canada

    Specialized in Large Language Models (LLMs) with a particular focus on Azure OpenAI services — building efficient, scalable, and intelligent systems and weaving them into real products.

    • Crafted and implemented scalable, AI-powered applications built on Azure OpenAI services.
    • Integrated LLMs into diverse application environments and existing infrastructure.
    • Solved complex AI application challenges and optimized system performance.
    • Tracked the latest advances in AI, cloud, and software development to keep solutions current.
    • Azure OpenAI
    • LLMs
    • Machine Learning
    • Azure
    • .NET
  3. 03 / 05Apr 2022Dec 2023

    Cloud Solutions Developer

    Clear Concepts · Winnipeg, Manitoba, Canada

    Kept all my frontend responsibilities while taking on cloud-based development, shipping software across Microsoft 365 and the Azure platform.

    • Built Microsoft Teams applications and a WinUI 3 desktop application.
    • Developed cloud solutions on Azure App Service, Cosmos DB, and Azure Functions.
    • Integrated deeply with Microsoft 365 and Office 365 through the Graph API.
    • Built modern UIs with React.js and TailwindCSS.
    • TypeScript
    • JavaScript
    • React
    • TailwindCSS
    • Azure
    • Cosmos DB
    • Azure Functions
    • Microsoft Graph
    • WinUI 3
  4. 04 / 05Aug 2021Apr 2022

    Frontend Developer

    Clear Concepts · Winnipeg, Manitoba, Canada

    Transformed internal applications visually, modernizing their interfaces and bringing them in line with the Microsoft Fluent Design Language.

    • Rewrote and updated app frontends using React.js and its ecosystem.
    • Aligned application UI with the Microsoft Fluent Design Language.
    • Applied UI frameworks including TailwindCSS and Bootstrap.
    • Wireframed interfaces with UXPin and Figma.
    • React
    • TailwindCSS
    • Bootstrap
    • Figma
    • UXPin
  5. 05 / 05Jul 2016Jul 2021

    Solutions Developer

    Core49 Software Design & Development, Inc. · Winnipeg, Canada Area

    Collaborated with diverse clients to deliver tailored software, addressing unique requirements across web, desktop, and mobile — from custom integrations and legacy maintenance to real-time and cross-platform applications.

    • Built and integrated custom software with client systems including Microsoft AD and Microsoft Dynamics.
    • Created a real-time auction web application using SignalR, Angular, and .NET Core API.
    • Built a data-transformation tool exporting to PDF, Excel, and Word.
    • Developed and shipped a Xamarin mobile app to the Google Play and Apple App stores.
    • Wrote performant SQL queries to improve data I/O processing.
    • Earned HIPAA certification to securely handle US medical clients' patient data.
    • VB.NET
    • ASP.NET WebForms
    • .NET Core API
    • Angular
    • SignalR
    • Xamarin
    • SQL Server
    • Figma

Projects

Auto-updated from my public GitHub, with a few favorites pinned.

Let's build something

I care about craft, momentum, and solving real problems. If you're working on something ambitious, I'd love to hear about it.