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Lessons (40)

• What Is Artificial Intelligence? A Developer's Guide

  … Changes in traffic, customers, or data collection can reduce accuracy after deployment. When should a developer use AI …

• Developer Learning Plan and Document-Assistant Capstone

  … Existing web developers can reuse API, authentication, testing, and deployment skills. Stage Learn Build Completion evidence --- --- --- --- Week 1 …

• Environments, Workspaces, and Multiple Accounts

  Separate development and production ownership, understand workspace limits, and configure provider aliases. Isolation has several layers Development and …

• Imports, Moved Blocks, and Safe Refactoring

  … Further reading: [Import overview](https://developer.hashicorp.com/terraform/language/import), [module refactoring](https://developer.hashicorp.com/terraform …

• Reusable Modules and Clear Interfaces

  … Further reading: [Module development](https://developer.hashicorp.com/terraform/language/modules/develop).

• What Is Software Architecture?

  … queues inside the system Developers, ops 3. Component Main modules inside one container Developers 4. Code Classes (usually …

• Variables, Locals, Outputs, and Validation

  … Further reading: [Input variables](https://developer.hashicorp.com/terraform/language/values/variables), [outputs](https://developer.hashicorp.com/terraform …

• Count, for_each, Functions, and Stable Identities

  … Further reading: [for each](https://developer.hashicorp.com/terraform/language/meta-arguments/for each), [functions](https://developer.hashicorp …

• HCL, Resource Addresses, and Project Layout

  … Further reading: [Configuration syntax](https://developer.hashicorp.com/terraform/language/syntax/configuration), [dependency lock file](https://developer.hashicorp …

• Your First Terraform Project

  … Further reading: [CLI workflow](https://developer.hashicorp.com/terraform/cli/run).

• Testing, Preconditions, and Policy Checks

  … Further reading: [Terraform tests](https://developer.hashicorp.com/terraform/language/tests), [custom conditions](https://developer.hashicorp.com/terraform …

• Dependencies, Data Sources, and Resource Lifecycle

  … Further reading: [Lifecycle reference](https://developer.hashicorp.com/terraform/language/meta-arguments/lifecycle), [data sources](https://developer.hashicorp …

• State, Remote Backends, and Locking

  … Team projects need shared storage, controlled access, and a supported locking mechanism. mermaid flowchart LR A[Developer or …

• Secrets, Ephemeral Values, and Least Privilege

  … See [write-only arguments](https://developer.hashicorp.com/terraform/language/manage-sensitive-data/write-only) and [ephemeral variables …

• CI/CD and Reviewed Production Changes

  … Further reading: [Terraform in automation](https://developer.hashicorp.com/terraform/tutorials/automation/automate-terraform), [HCP Terraform](https://developer …

• Drift, Troubleshooting, and Disaster Recovery

  … Further reading: [State management](https://developer.hashicorp.com/terraform/cli/state), [refresh-only planning](https://developer.hashicorp.com …

• What to Learn in AI, and in What Order

  … vision, language, speech, recommendations, forecasting, and reinforcement learning. - [Developer plan and capstone](/learn/ai/developer-roadmap-and-capstone …

• Run Containers on AWS with ECR and ECS

  … Further reading: [ECS roles](https://docs.aws.amazon.com/AmazonECS/latest/developerguide/ecs-iam-role-overview.html), [Fargate …

• AWS Security Building Blocks

  … customer, API workload, and developer. Give the customer access only to its own orders, the workload access to …

• AWS: Start Here

  … what cloud means, where services run, and the first services a developer meets. The short version AWS lets …

• Domain-Driven Design: Strategic Design

  … Ubiquitous language A ubiquitous language is a shared vocabulary that developers and domain experts use everywhere : in conversations …

• Monolith vs Microservices

  … 8 fallacies of distributed computing are all things developers wrongly assume when splitting a system: 1. The network …

• N+1 Queries, Loading & Pagination

  … In development, log duplicate query fingerprints. In production, sample traces rather than logging sensitive SQL values.

• Finding Service Boundaries with DDD

  … 6. Event storming: put business experts and developers in a room with sticky notes for every domain event …

• Configuration, Secrets and Storage

  … Do not build separate images containing “development database” or “production database.” Put environment-specific settings outside the image …

• CloudFront: Faster Websites and Safer File Delivery

  … Further reading: [Private S3 origins and OAC](https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/private-content-restricting …

• IAM: Who Can Do What

  … Every request has a who , an action , and a resource . text Developer role + s3:GetObject + photos bucket = allowed …

• Node.js and Express

  … z.enum(["development", "test", "production"]).default("development"), PORT: z.coerce.number().default(3000), DATABASE URL: z.string().url …

• Terraform: Start Here

  … Further reading: [Terraform introduction](https://developer.hashicorp.com/terraform/intro).

• Machine Learning Fundamentals

  … differ. The big idea In traditional programming, a developer writes rules that turn inputs into outputs. In machine …

• Scalable Frontend Architecture

  … A scalable application is not the one with the most folders; it is the one where a developer …

• What Are Design Patterns?

  … proven solutions with names, so developers can say "let's use an Observer here" instead of explaining 50 …

• Practical Project: Deploy a Real CRM App on EKS

  … The complete mental model mermaid flowchart LR DEV[Developer] -- GIT[Git repository] GIT -- CI[GitHub Actions or CodeBuild …

• What Is Clean Code?

  … Clean code is working code that is easy to read and easy to change. 💡 Remember: Developers spend about …

• Kubernetes Cluster Architecture, Simply

  … It is easy to have a development and production cluster in the same config. Namespaces: folders inside one …

• AWS Interview Questions: Clear Answers

  … deletion. Example: failing over does not undo a developer deleting all order records. You need a tested recovery …

• KISS: Keep It Simple, Stupid

  … abstraction or clever trick is something the next developer has to learn before they can change anything. Example …

• GitOps, Progressive Delivery and Observability

  … Git and reconciles it. mermaid flowchart LR Dev[Developer] -- pull request G[(Git repo)] G -- watched by A …

• Python and Math Foundations with Runnable Examples

  … A web developer can keep a TypeScript frontend while using Python for model experiments. Features are measurable inputs …

• C4 Architecture Diagrams: Context, Container, Component and Code

  … A container diagram helps developers and operations people agree on responsibilities : where a request goes, where data lives …