System Design Course – APIs, Databases, Caching, CDNs, Load Balancing & Production Infra

In this full stack development course, you will learn how to create an application using MongoDb for the database, Java and Spring Boot for the backend, and React for the frontend. You will learn to develop a movie review application that will feature a separation of concerns between the client code and the server code. By implementing this loosely coupled architecture, these two parts (implemented using different technologies) can evolve in parallel and independently from one another. ✏️ Farhan Hasin Chowdhury teaches the backend section. ✏️ Gavin Lon teaches the frontend section. @GavinLon 💻 Backend Code: https://github.com/fhsinchy/movieist 💻 Frontend Code: https://github.com/GavinLonDigital/movie-gold-v1 🔗 Spring Initializr - https://start.spring.io/ 🔗 JDK Download Page: https://www.oracle.com/java/technologies/downloads/ 🔗 IntelliJ IDEA Download Page: https://www.jetbrains.com/idea/download/ 🔗 Postman Download Page: https://www.postman.com/downloads/ 🏗 MongoDB provided a grant to make this course possible. ❤️ Try interactive Full Stack courses we love, right in your browser: https://scrimba.com/freeCodeCamp-Fullstack (Made possible by a grant from our friends at Scrimba) ⭐️ Contents ⭐️ ⌨️ (0:00:00) Course Introduction ⌨️ (0:01:48) JDK and IntelliJ IDEA Installation ⌨️ (0:06:13) MongoDB Atlas ⌨️ (0:20:35) Project Initialization ⌨️ (0:27:03) Project Structure ⌨️ (0:29:13) Running The Project ⌨️ (0:32:41) Writing The First Endpoint ⌨️ (0:35:33) Database Configuration ⌨️ (0:38:49) Installing Additional Dependencies ⌨️ (0:44:48) Setting Up Environment Variables ⌨️ (0:47:20) Movies and Reviews Endpoints ⌨️ (1:31:46) Testing ⌨️ (1:35:42) Backend Conclusion ⌨️ (1:36:45) Frontend Introduction ⌨️ (1:38:32) Create the React Project ⌨️ (1:43:49) Applying Bootstrap to our React application ⌨️ (1:52:47) Implementing the Use State and Use Effect Hooks ⌨️ (1:58:04) Create Home and Hero Component ⌨️ (2:06:56) Style the Carousel ⌨️ (2:15:21) Create Header Component (Navigation) ⌨️ (2:21:55) Create Trailer Component with react-player ⌨️ (2:28:46) Create Movie Reviews Functionality ⌨️ (2:34:43) Add and Get Reviews with HTTP Requests ⌨️ (2:40:33) Course Wrap Up 🎉 Thanks to our Champion and Sponsor supporters: 👾 Nattira Maneerat 👾 Heather Wcislo 👾 Serhiy Kalinets 👾 Erdeniz Unvan 👾 Justin Hual 👾 Agustín Kussrow 👾 Otis Morgan -- Learn to code for free and get a developer job: https://www.freecodecamp.org Read hundreds of articles on programming: https://freecodecamp.org/news

Learn the Go programming language in this full course for beginners. You'll practice writing performant, idiomatic Go with these hands-on lessons and challenges. 💻 Code: https://github.com/bootdotdev/fcc-learn-golang-assets 💻 Follow along interactively on Boot.dev: https://boot.dev/learn/learn-golang ✏️ Course created by @bootdotdev 🐦 Follow Lane on Twitter: https://twitter.com/wagslane 🔗 Learn back-end on Boot.dev: https://boot.dev 🔗 Need help? Join the Boot.dev Discord: https://boot.dev/community Documentation used: 🔗 Chi router: https://github.com/go-chi/chi 🔗 Goose migrations: https://github.com/pressly/goose 🔗 Text instructions for the project: https://boot.dev/build/blog-aggregator ⭐️ Contents ⭐️ (0:00:00) Intro (0:03:17) Ch 1. Why write Go? (0:27:39) Ch 2. Variables (0:51:11) Ch 3. Functions (1:16:58) Ch 4. Structs (1:34:36) Ch 5. Interfaces (2:00:26) Ch 6. Errors (2:22:01) Ch 7. Loops (2:48:21) Ch 8. Slices (3:39:54) Ch 9. Maps (4:06:19) Ch 10. Advanced functions (4:31:03) Ch 11. Pointers (4:48:02) Ch 12. Local development (5:31:43) Ch 13. Channels & concurrency (6:07:38) Ch 14. Mutexes (6:30:56) Ch 15. Generics (6:38:38) Ch 16. Quiz (6:43:13) P1. RSS aggregator project (6:53:43) P2. Chi router (7:11:37) P3. Postgres database (7:39:10) P4. Authentication w/ API keys (8:18:28) P5. Many to many relationships (8:39:13) P6. Aggregation worker (9:05:28) P7. Viewing blog posts 🎉 Thanks to our Champion and Sponsor supporters: 👾 davthecoder 👾 jedi-or-sith 👾 南宮千影 👾 Agustín Kussrow 👾 Nattira Maneerat 👾 Heather Wcislo 👾 Serhiy Kalinets 👾 Justin Hual 👾 Otis Morgan -- Learn to code for free and get a developer job: https://www.freecodecamp.org Read hundreds of articles on programming: https://freecodecamp.org/news ❤️ Support for this channel comes from our friends at Scrimba – the coding platform that's reinvented interactive learning: https://scrimba.com/freecodecamp

Learn the core fundamentals of Docker by building a Node/Express app with a Mongo & Redis database. We'll start off by keeping things simple with a single container, and gradually add more complexity to our app by integrating a Mongo container, and then finally adding in a redis database for authentication. We'll learn how to do things manually with the cli, then move on to docker compose. We'll focus on the challenges of moving from a development environment to a production environment. We'll deploy and Ubuntu VM as our production server, and utilize a container orchestrator like docker swarm to handle rolling updates. ✏️ Course developed by Sanjeev Thiyagarajan. Check out his channel: https://www.youtube.com/channel/UC2sYgV-NV6S5_-pqLGChoNQ ⭐️ Course Contents ⭐️ 0:00:14 Intro & demo express app 0:04:18 Custom Images with Dockerfile 0:10:34 Docker image layers & caching 0:20:26 Docker networking opening ports 0:26:36 Dockerignore file 0:31:46 Syncing source code with bind mounts 0:45:30 Anonymous Volumes hack 0:51:58 Read-Only Bind Mounts 0:54:58 Environment variables 0:59:16 loading environment variables from file 1:01:31 Deleting stale volumes 1:04:01 Docker Compose 1:21:36 Development vs Production configs Part 02: Working with multiple containers 1:44:47 Adding a Mongo Container 2:01:48 Communicating between containers 2:12:00 Express Config file 2:21:45 Container bootup order 2:32:26 Building a CRUD application 2:51:27 Sign up and Login 3:06:57 Authentication with sessions & Redis 3:34:36 Architecture Review 3:40:48 Nginx for Load balancing to multiple node containers 3:54:33 Express CORS Part 03: Moving to Prod 3:57:44 Installing docker on Ubuntu(Digital Ocean) 4:03:21 Setup Git 4:05:37 Environment Variables on Ubuntu 4:14:12 Deploying app to production server 4:18:57 Pushing changes the hard way 4:25:58 Rebuilding Containers 4:27:32 Dev to Prod workflow review 4:30:50 Improved Dockerhub workflow 4:46:10 Automating with watchtower 4:56:06 Why we need an orchestrator 5:03:32 Docker Swarm 5:16:13 Pushing changes to Swarm stack -- Learn to code for free and get a developer job: https://www.freecodecamp.org Read hundreds of articles on programming: https://freecodecamp.org/news ❤️ Support for this channel comes from our friends at Scrimba – the coding platform that's reinvented interactive learning: https://scrimba.com/freecodecamp

Learn to build, debug, optimize, and scale RAG systems for production. 🚀 Free Production AI Starter Kit: https://bit.ly/production-ai-pack This course teaches what tutorials skip: why 90% of RAG projects fail and how to fix them. 💻 Code, Parts 1-5: https://github.com/pdichone/production-course-main-code 💻 Code, Part 6: https://github.com/pdichone/fcc-production-rag-part-6 Paulo's channel: @vincibits ❤️ Support for this channel comes from our friends at Scrimba – the coding platform that's reinvented interactive learning: https://scrimba.com/freecodecamp ⭐️ Chapters ⭐️ 0:00:00 Intro 0:01:44 Full RAG Overview 0:08:27 Development Environment Setup 0:15:35 Document Loader - Overview 0:28:27 Document Processing Pipeline - RAG Indexing Pipeline 0:48:12 Embedding Dimensions - Deep Dive 1:01:05 Hands-on - Create a Vector DB Using Chroma 1:17:48 Similarity Search with Scores 1:24:32 Building a Basic RAG System 1:33:16 Debugging RAG Systems 1:53:46 Hybrid Search 1:13:49 Token Budgeting 2:21:10 Observability - Introduction 2:29:56 LangSmith Setup 2:37:56 RAG Optimization 3:12:58 Scaling RAG Systems 3:23:35 The Real Costs of Vector Search 3:33:17 Production Hosting 3:36:00 Supabase and PGVector - Set up and Introduction 4:04:41 Three Pillars of Production Visibility 4:16:11 Production Project 4:34:36 Set up the Security Layer 4:16:11 Set up the LangGraph Agent and the FastAPI API - Testing and LangSmith Observability Dashboard 5:27:46 Test the Security Layer 5:41:36 Security Checklist 6:06:09 Advanced RAG Topics - Long Context Models vs RAG 6:14:29 Contextual Retrieval 6:24:26 Late Chunking vs Early Chunking 6:42:04 Agentic RAG - Self-Correcting Retrieval 7:04:45 GraphRAG - Multi-hop Reasoning 7:24:28 Multimodal RAG - ColPali - Vision-Based Document RAG 7:34:45 Summary - Advanced RAG (Current State) 7:37:02 RAG Evolution - Overview 7:38:35 Outro 🎉 Thanks to our Champion and Sponsor supporters: 👾 @omerhattapoglu1158 👾 @goddardtan 👾 @akihayashi6629 👾 @kikilogsin 👾 @anthonycampbell2148 👾 @tobymiller7790 👾 @rajibdassharma497 👾 @CloudVirtualizationEnthusiast 👾 @adilsoncarlosvianacarlos 👾 @martinmacchia1564 👾 @ulisesmoralez4160 👾 @_Oscar_ 👾 @jedi-or-sith2728 👾 @justinhual1290 -- Learn to code for free and get a developer job: https://www.freecodecamp.org Read hundreds of articles on programming: https://freecodecamp.org/news

In this course, you’ll master Next.js 16, the latest version of the official React framework, and learn how to build powerful, full-stack applications using its new caching and performance features. You’ll put your skills into practice by creating and deploying a Dev Event Platform, a modern app where users can browse, create, and manage events. PostHog: https://jsm.dev/devevent-posthog WebStorm: https://jsm.dev/devevent-webstorm Junie AI: https://jsm.dev/devevent-junie Warp: https://jsm.dev/devevent-warp CodeRabbit: https://jsm.dev/devevent-coderabbit CodeRabbit CLI: https://jsm.dev/devevent-coderabbitcli Cloudinary: https://jsm.dev/devevent-cloudinary The Complete Testing Course is LIVE. 🔥 Bundle up now before the deal expires and get 33% Off‼ 👉 https://jsm.dev/devevent-testing 📗 GSAP Pro Course (includes GTAVI Website): https://jsm.dev/devevent-gsap 📕 Three.js 3D Pro Course: https://jsm.dev/devevent-threejs 📙 JavaScript Pro Course: https://jsm.dev/devevent-cpjsm 🚀 Launch Your SaaS Pro Course: https://jsm.dev/devevent-saas ‼ If the links aren’t working for you, please try using a VPN (e.g., in Nigeria) 📁 FREE Video Kit (Code, Figma, Assets, Etc.): https://jsm.dev/devevent-kit 👉 Backend Pro Course Waitlist: https://jsm.dev/devevent-backpro 👉 AI Development Pro Course Waitlist: https://jsm.dev/devevent-aipro 👉 Tailwind Pro Course Waitlist: https://jsm.dev/devevent-twpro 👉 React.js Pro Course Waitlist: https://jsm.dev/devevent-reactpro 👉 React Native Pro Course Waitlist: https://jsm.dev/devevent-nativepro Rate us on TrustPilot: https://jsm.dev/trustpilot https://discord.com/invite/n6EdbFJ https://twitter.com/jsmasterypro https://instagram.com/javascriptmastery https://linkedin.com/company/javascriptmastery Business Inquiries: contact@jsmastery.pro Time Stamps: 00:00:00 — Introduction 00:04:09 — Crash Course Intro 00:08:30 — Installation 00:11:45 — Project Structure 00:14:19 — App Router 00:17:16 — React Client & Server Components 00:23:40 — Routing 00:42:42 — Data Fetching 00:48:53 — API Routes 00:52:45 — Caching 00:56:05 — Build Adapters API 00:57:24 — Metadata 01:01:23 — Theory to Practice — — — 01:02:48 — Project Setup 01:18:01 — Homepage 01:41:35 — PostHog Setup 01:50:21 — MongoDB Setup 01:52:57 — Warp Setup 01:56:46 — Database Models & Connection 02:09:36 — CodeRabbit 02:16:11 — API Routes 02:27:03 — Image Upload 02:37:51 — Fetch API Routes 02:54:47 — Event Details Page 03:14:34 — Server Actions 03:28:05 — Caching 03:39:46 — PostHog: Booking Action & Tracking 03:54:05 — Deployment 03:58:15 — Outro

This 8 hour course teaches you all of the core fundamentals you need to learn how to build server applications using Express JS. You will learn how to implement the basic HTTP request methods, validate request bodies, implement sessions, save data to a database, manage user authentication, integrate OAuth2, and writing automated unit & integration tests! Code: https://github.com/stuyy/expressjs-full-course Support the Channel: Become a Member: https://www.youtube.com/ansonthedeveloper/join Become a Patreon: http://patreon.com/stuyy Buy me a Coffee: http://ko-fi.com/anson Donate on PayPal: https://paypal.me/ansonfoong Connect with me: Twitter: https://twitter.com/ansonthedev Discord: https://discord.gg/MDHGJsAsXA GitHub: http://github.com/stuyy Twitch: http://twitch.tv/stuy 0:00 Intro & Setup 11:01 Get Requests 20:40 Route Params 30:08 Query Params 42:54 Post Requests 56:07 Put Requests 1:10:02 Patch Requests 1:19:00 Delete Requests 1:26:47 Middleware 1:48:24 Validation 2:19:52 Routers 2:38:59 Cookies 2:58:59 Sessions 3:15:24 Sessions Pt. 2 3:38:02 Passport.js & Authentication 4:15:39 Databases & MongoDB 4:42:10 Hashing Passwords 4:54:45 Session Store 5:11:58 OAuth2 5:49:38 Unit Testing & Jest 7:14:12 E2E Testing