Hire the Best .NET Core Developers
in Indonesia

• Also known as Windows and macOS App Developer Expert • I use AI, obviously. I mean, who doesn't? • 5+ years of experience • I work on backend, frontend, databases, and Linux server administration • Main stack: .NET (C# / Visual Basic) and TypeScript / JavaScript • I build web and multi-platform desktop/mobile applications 📚 Technologies • My main tech stack is .NET (C# or Visual Basic .NET) and TypeScript / JavaScript • For .NET, I work with ASP .NET, Blazor, WPF, Windows Forms, MAUI (formerly Xamarin), Avalonia UI, and more • For TypeScript / JavaScript, I prefer React, but I can also work with Angular, jQuery, or vanilla JS • I can also develop macOS and iOS apps using Swift and Objective-C 🗼 Server Administration and DevOps • Familiar with Debian-based Linux distributions like Ubuntu • Able to handle VPS baremetal or Docker-based setups • Able to automate workflows using Bash, Python, GitHub Actions, and similar tools • Experienced with cloud services such as AWS and Azure 📊 Database • Microsoft SQL Server • MySQL / MariaDB • SQLite • PostgreSQL • Microsoft Access 💡 Skills • Strong in algorithm design and analysis • Great ability to solve programming and system trouble • Great at optimizing software performance • Flexible work style • Adaptive team player 📖 Self-Update • I regularly study new technologies to stay up to date. 🕰️ Flexible Availability • Open to collaborate across multiple time zones (US, CA, UK, EU, APAC, etc.) ✅ I’m not a robot. • I’m a real human and a solo freelancer, not an agency 🙌 Let’s Connect! • My name is Junian and I’d love to help bring your ideas to life • Feel free to reach out so we can discuss how I can support your project • Not a Vibe Coder, but use AI-Assisted Programming tools to solve problems • Linus Torvalds once said, “Talk is cheap. Show me the code.” So go ahead and check out my GitHub code. 🛠️ Common Tasks and Roles • Known as the Apple / macOS / iPhone guy • Build Windows app with .NET Framework & Windows Forms (WinForms) / Windows Presentation Foundation (WPF) / WinUI / Avalonia UI / MAUI / Xamarin • Build Windows Installer MSI / EXE from existing Windows App by using Wix / WixSharp • Build macOS app with Swift UI or .NET & Avalonia UI / MAUI / Xamarin • Build, sign, and notarize macOS app installer (PKG / DMG / ZIP) • Build web app with ASP .NET & Blazor / React / Angular / Vanilla JavaScript • Deploy and configure existing web apps by using Docker container to VPS / Cloud providers like AWS, Azure, or GCP • Ethical decompile / reverse engineer / source code retrieval / deobfuscation of existing .NET EXE / DLL / MSI or NinjaTrader Trading Indicator / strategy • Automate Windows UI tasks • Web scraping to retrieve online data / PDF / Images / any other files • Expert macOS system and app troubleshooting 🙋‍♂️ What I'm not • I'm not a Vibe Coder. Don't get me wrong, I use AI to build software, but I don't solely rely on it.

Keep your .NET and Angular applications reliable, maintainable, and production-ready, whether you’re building new features, stabilizing existing systems, or launching greenfield projects. Specialties: - Greenfield development with clean, scalable architecture - Long-term maintenance and feature delivery - Stabilizing fragile systems and fixing recurring bugs AI-assisted development speeds up planning, testing, and refactoring while all changes are carefully reviewed, ensuring stable, high-quality production code. Projects run smoothly with clear communication, realistic scope adjustments, and a single decision-maker.

With over 14 years in .NET application development, I specialize in crafting desktop applications using C#, VB.NET, Crystal Report and SQL Server. Since 2021, I've ventured into web development, utilizing Blazor, HTML, CSS, JavaScript, and NET MAUI to create dynamic and responsive applications. My diverse portfolio spans various industries, showcasing my adaptability and commitment to staying at the forefront of technology. As a results-driven developer, I excel in delivering solutions that exceed client expectations, blending technical expertise with user-centric design principles.

Highly skilled web application developer with over 10 years of experience in designing, building, and optimizing scalable, user-friendly applications. Proficient in modern frameworks like ASP.NET Core, Java Spring Boot, Angular, React, and PostgreSQL, with a focus on delivering high-performance solutions. Also most skilled in RESTful API and building Microservices Architecture.

Hi, I’m Nathan, a Software Engineer with 4+ years of experience building scalable web applications, business systems, and AI powered solutions. I specialize in full stack development using Next.js, React, FastAPI, Node.js, and Laravel, with strong experience in designing reliable backend services, modern frontend applications, and production ready architectures. Over the years, I’ve worked on projects involving: • AI Agents & AI Automation • OpenAI & Gemini Integration • RAG (Retrieval-Augmented Generation) Systems • REST API Development • CRM & Internal Business Systems • SaaS Applications • PostgreSQL & Database Design • Docker & Cloud Deployment • Workflow Automation I focus on writing clean, maintainable, and scalable code while ensuring clear communication and reliable delivery throughout the project lifecycle. What I can help you with: • Full Stack Web Development • AI Integration & AI Agents • Next.js & React Applications • FastAPI, Node JS and Laravel Backend Development • REST API Development • SaaS Product Development • Database Design & Optimization • Workflow Automation • Docker Deployment & Infrastructure • Long term Product Development I’m open to long term collaboration and helping businesses build high quality software products from idea to production.

25 years in .NET as a full stack C# developer and solution architect. ETL, high performant and resilient distributed systems are my primary fields of expertise. AI workflows - either Claude Code based or LangGraph with openweigth models (gemma4, qwen, deepseek, anything). Can go bare or can go Claude-boosted, no vibe coding. What I love to do: ▶ Design and build high load or close-to-RT application/platform from scratch ▶ Implement complex AI-heavy workflows via LangGraph and on premises or cloud LLMs ▶ Deploy diffusion model workflows to automate still images and video content generation ▶ Harness AI agents to cut implementation time 5x dedicating myself to architecture and problem solving ▶ Solve non-trivial performance tasks ▶ Debug, troubleshoot and refactor legacy projects ▶ Audit software solutions to spot potential scalability, performance, data consistency or operation problems. ▶ Integrate REST/Sockets APIs into your application, including crypto-parts (BTC, ETH, ERC-20 and others) My areas of expertise: ◉ C# NET full stack ◉ High load, distributed, close to RT systems architect ◉ Microsoft SQL Server ◉ External APIs of all sorts and complexity ◉ Cryptocurrencies essentials and integration ◉ HubSpot API (4+ years intensive usage in high load multi-tenant system) ◉ Clouds: AWS and Azure ◉ CI/CD: BitBucket, GitHub My background and skills: ★ 20+ years of experience in .NET software development ★ 5 years of software architecture design and implementation. ★ Highload backend solutions ★ 5 years of extensive experience in development team leading ★ Fluent written and spoken English ★ Computer science Bachelor degree in 2006 Career highlights through recent past: ★ Reworked HubSpot-targeting product that allowed business operation growth from 80 clients to 1000+; turned another PoC into production ready software serving hundreds of customers by now ★ Mission critical accounting software for customer from scratch, 10+ years in use by now ★ Fully automated cryptocurrency trading engine ★ Refactored spaghetti-coded legacy system to bring it to a competitive state and allow for implementing state of the art AI-driven features ★ Mission critical backend data management system from scratch ★ High load optimization for Oracle-based national telecom reporting tool Technologies I prefer to deal with: ☑ C# net10/9/8/6 ☑ Claude Code via custom harness for daily use ☑ Python LangGraph + langfuse ☑ Blazor, AspNetCore, AspNet MVC ☑ Legacy C# all the way down to NET 1.1 and ASPNET Forms ☑ EntityFramework (EFCore) and Dapper ☑ CI/CD via GitHub or BitBucket or Azure DevOps ☑ WPF/UWP mvvm style ☑ JavaScript/jQuery ☑ Microsoft SQL Server, SSRS