Create tech-giants.md

Author: smamran

software-stacks/tech-giants.md

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+### **Programming Languages Used by Top Tech Companies**  
+
+Different tech companies use different programming languages based on their needs, infrastructure, and historical choices. Here’s an overview of what major companies use:  
+
+---
+
+## **1️⃣ FAANG & Big Tech Companies**  
+
+| **Company**    | **Backend**               | **Frontend**            | **Data/ML**                  | **DevOps & Others**         |
+|---------------|--------------------------|------------------------|-----------------------------|---------------------------|
+| **Facebook (Meta)** | PHP (Hack), Python, C++, Java | React, JavaScript, TypeScript | PyTorch, Python, C++        | Kubernetes, Terraform |
+| **Amazon (AWS)**  | Java, Kotlin, Python, Go | JavaScript, TypeScript, React | SageMaker (Python), Scala, Spark | AWS, Docker, Kubernetes |
+| **Apple**       | Swift, Objective-C, C++, Go | Swift, React, JavaScript | TensorFlow, CoreML, Python | Xcode, Swift Package Manager |
+| **Netflix**     | Java, Kotlin, Python, Go | React, TypeScript | Python, Spark, TensorFlow | AWS, Kubernetes |
+| **Google (Alphabet)** | Go, Java, Python, C++ | Angular, JavaScript, TypeScript | TensorFlow, JAX, PyTorch | Kubernetes (Created by Google) |
+
+---
+
+## **2️⃣ Other Major Tech Companies**  
+
+| **Company**         | **Backend**             | **Frontend**            | **Data/ML**                  | **DevOps & Others**         |
+|--------------------|----------------------|----------------------|---------------------------|---------------------------|
+| **Microsoft**     | C#, .NET, Java, Python | React, TypeScript    | Azure ML, TensorFlow, PyTorch | Azure, Docker, Kubernetes |
+| **Tesla**         | Python, C++, Java     | React, JavaScript    | AI with PyTorch, TensorFlow | Edge AI, AutoML |
+| **Uber**          | Go, Node.js, Python   | React, JavaScript    | ML using Python, Spark    | Kubernetes, Mesos |
+| **Twitter (X)**   | Scala, Java, Python   | React, TypeScript    | ML with TensorFlow, Scala | Kubernetes, AWS |
+| **LinkedIn**      | Java, Scala, Python   | React, TypeScript    | Spark, MLlib, PyTorch     | Kubernetes, Azure |
+
+---
+
+## **3️⃣ Startups & Emerging Tech**  
+
+| **Company Type**    | **Common Backend**       | **Frontend**            | **AI/Data Science**           | **DevOps**                 |
+|-------------------|----------------------|----------------------|---------------------------|---------------------------|
+| **Fintech (Stripe, PayPal)** | Java, Ruby, Python, Go | React, TypeScript | Python, Spark, Scikit-learn | Kubernetes, AWS Lambda |
+| **AI Startups (OpenAI, DeepMind)** | Python, Rust, C++ | JavaScript, React | PyTorch, TensorFlow, JAX | Docker, Kubernetes |
+| **E-commerce (Shopify, WooCommerce)** | Ruby on Rails, PHP, Go | React, Liquid (Shopify) | Python, AI-driven recommendations | AWS, Kubernetes |
+| **Cybersecurity (CrowdStrike, Palo Alto Networks)** | C, C++, Rust, Python | React, Angular | AI-driven security models | Kubernetes, Firewalls |
+
+---
+
+## **4️⃣ Government & Enterprise Tech**  
+
+| **Industry**       | **Common Backend**         | **Frontend**            | **AI/Data Science**           | **DevOps & Infra**         |
+|-------------------|----------------------|----------------------|---------------------------|---------------------------|
+| **Banking & Finance** | Java, C#, Python, COBOL | React, Angular | AI Risk Modeling (Python, ML) | AWS, Kubernetes |
+| **Healthcare**   | Python, Java, C#     | React, Vue.js       | AI for medical imaging (TensorFlow) | Azure, Kubernetes |
+| **Aerospace & Defense** | C++, Rust, Ada, Python | JavaScript, React | AI-enhanced simulations | Custom HPC clusters |
+
+---
+
+### **Key Takeaways**
+✅ **Java, Python, and JavaScript** are dominant across most tech companies.  
+✅ **C++ and Rust** are used where performance is critical (AI, gaming, low-level systems).  
+✅ **Go and Node.js** are gaining popularity for backend microservices.  
+✅ **React + TypeScript** is the most common frontend stack.  
+✅ **AI & ML** companies prefer **Python (PyTorch, TensorFlow, Spark)**.  
+✅ **DevOps relies heavily on Kubernetes, Docker, Terraform, and cloud platforms (AWS, GCP, Azure).**  
+
+Would you like recommendations based on your **batch computing setup** and skills? 🚀