The latest articles on DEV Community by Camilo Llamas (@llama126). https://dev.to/llama126 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4090607%2Ffcaf151c-9d5b-4fa3-bc68-9f8eead7ecce.png https://dev.to/llama126 en Camilo Llamas Sun, 23 Aug 2026 08:41:25 +0000 https://dev.to/llama126/how-i-built-fastmedia-downloader-a-microservices-architecture-with-fastapi-nextjs-and-docker-fg https://dev.to/llama126/how-i-built-fastmedia-downloader-a-microservices-architecture-with-fastapi-nextjs-and-docker-fg <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fk4v88khy7qc7bcv62pv7.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fk4v88khy7qc7bcv62pv7.png" alt=" " width="800" height="463"></a></p> <p>Hey devs! 👋</p> <p>I recently built and open-sourced <strong>FastMedia Downloader</strong>, a full-stack platform designed to inspect and extract multimedia content from over 1,000 supported platforms (YouTube, TikTok, Instagram Reels, X/Twitter, SoundCloud, and more).</p> <p>I wanted to share how I structured the project, the tech stack I selected, and how the microservices communicate with each other.</p> <h3> 🏗️ Architecture &amp; Tech Stack </h3> <p>The system is split into two independent, containerized microservices:</p> <ul> <li> <strong>Backend (FastAPI + Python 3.11):</strong> Core orchestrator that manages asynchronous requests, media inspection, and conversion via custom wrappers around <code>yt-dlp</code> and <code>FFmpeg</code>.</li> <li> <strong>Frontend (Next.js + TypeScript + Tailwind CSS):</strong> Responsive, modern interface with multi-language support (i18n) and instant link parsing.</li> <li> <strong>Infrastructure (Docker Compose):</strong> Ensures both services run in isolated environments for seamless local deployment (<code>docker-compose up</code>).</li> <li> <strong>DevOps &amp; Security:</strong> Automated CI/CD pipelines via GitHub Actions, Dependabot vulnerability scanning, and Open Source Standard rulesets.</li> </ul> <h3> 🛠️ Key Engineering Takeaways </h3> <p>Building this project helped me refine several practical patterns:</p> <ol> <li> <strong>Async Handling in FastAPI:</strong> Processing media metadata streams asynchronously to keep response times low.</li> <li> <strong>Containerized System Dependencies:</strong> Encapsulating low-level binaries like <code>FFmpeg</code> directly inside isolated Docker containers without polluting the host environment.</li> <li> <strong>Clean Open-Source Workflow:</strong> Structuring a production-ready repository with proper rulesets, issue templates, and community standards.</li> </ol> <h3> 🔗 Source Code &amp; Repository </h3> <p>The entire project is completely open-source. Feel free to inspect the code, run it locally, or contribute!</p> <p>📌 <strong>GitHub Repository:</strong> <a href="https://github.com/Llamas126/fastmedia-downloader" rel="noopener noreferrer">https://github.com/Llamas126/fastmedia-downloader</a></p> <p>I’d love to hear your feedback on the microservice structure, performance tips, or features you’d like to see added next!</p> python fastapi nextjs opensource