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Lessons (40)

• Containers at Scale: ECS Deep Dive and EKS

  … API server, etcd] end subgraph Your account MNG[Managed node groups] KP[Karpenter nodes] FG[Fargate profiles] end …

• Serverless Architecture

  … zero ops, glue between managed services. ❌ Constant high-throughput workloads, long-running or stateful processes (game servers, WebSocket …

• State Management (Redux, Zustand, TanStack Query)

  Where should data live in a frontend app? Learn the four kinds of state, when local state is …

• Imports, Moved Blocks, and Safe Refactoring

  … object remains in AWS but leaves this state's management after apply. Confirm the successor owner first. Simply …

• Multi-Account Strategy, Governance and Security Operations

  … Mature organizations use many accounts , not one big one. mermaid flowchart TD Root[Management account] -- Sec[Security OU …

• Terraform: Start Here

  … Terraform's configuration, state, and plan play similar roles. Terraform talks to services through providers . AWS, Azure, Google …

• Kubernetes: Start Here

  … 1. Desired state — what you asked for. Example: “three copies.” 2. Actual state — what is running right now …

• Deployments: Keep Your App Running

  … A Deployment is the manager that says: “I need this many healthy copies of my app.” ![Deployment → ReplicaSet …

• API Contracts, Gateways and Security

  … Sessions are server-managed state; signed tokens carry claims but still need expiry, rotation and revocation strategy. OAuth …

• State, Remote Backends, and Locking

  … Two independent states managing the same object create competing owners. Local state is convenient for a single-person …

• Python Web APIs: FastAPI and Django

  … python manage.py startapp tasks then add "tasks" to INSTALLED APPS python manage.py runserver A Django project …

• StatefulSets, DaemonSets, Jobs and CronJobs

  … or OnFailure , plus backoffLimit and a deadline. - StatefulSet gives identity, not database management. Use operators or managed databases.

• Practical Project: Deploy a Real CRM App on EKS

  … ECR images, an EKS cluster, Pod Identity for Secrets Manager, private RDS, ingress, CI/CD, troubleshooting and a …

• EC2, Storage and Auto Scaling

  … Systems Manager Session Manager requires its agent, an appropriate role, and network access to the required service endpoints …

• Configuration, Secrets and Storage

  … In production, store the real values in AWS Secrets Manager, Vault, or another secret manager, then sync them …

• Count, for_each, Functions, and Stable Identities

  … Those identifiers become part of the state address. hcl Keep the local provider configuration from lesson 2. variable …

• Cost Optimization and the Well-Architected Framework

  … multi-region active-active doubles cost; justify it with RTO and RPO. - Managed versus self-managed : managed services …

• IAM: Who Can Do What

  … management process; do not assume your learner identity can edit IAM. json { "Version": "2012-10-17", "Statement": [ { "Sid …

• Dependencies, Data Sources, and Resource Lifecycle

  … A managed resource imported into state does. Prefer stable IDs or carefully constrained filters; ambiguous discovery can select …

• Kafka vs RabbitMQ & the Kafka Ecosystem

  … processing inside your app A Java library for stateful stream processing : filtering, mapping, joining streams, windowed aggregations, with …

• Internals, Upgrades, Resilience and Interview Questions

  … Deployment vs StatefulSet? Deployments manage interchangeable pods. StatefulSets give stable names, ordered rollout and per-pod persistent volumes …

• Drift, Troubleshooting, and Disaster Recovery

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

• Atomic Design & Component Libraries

  … replace—feature ownership, route boundaries, and clear API/state management. </details Key takeaways - Atomic Design explains how small …

• AWS Interview Questions: Clear Answers

  … AWS operates the server fleet, but you manage code, permissions, timeouts, concurrency, monitoring, and cost. Event retry behavior …

• SQL Language, Identifiers & Data Types

  … DCL manages permissions: GRANT and REVOKE. Many systems call COMMIT and ROLLBACK transaction-control statements. Q7: Identity, sequence …

• Serverless: Lambda and API Gateway

  Run small event-driven code without managing servers, expose it through an HTTP API, and handle retries safely …

• VPC Endpoints, Transit Gateway and Hybrid Networking

  … Endpoint policies restrict what can be done through an endpoint: json { "Statement": [{ "Effect": "Allow", "Principal": " ", "Action": ["s3:GetObject …

• Environments, Workspaces, and Multiple Accounts

  … Also distinguish CLI workspaces from HCP Terraform workspaces , which manage configuration, runs, settings, and state within the hosted …

• Design System Operations

  … This is useful for complex controls such as menus and dialogs, where keyboard navigation and focus management are …

• Behavioral Patterns II: Chain, Template, Iterator, Mediator, Memento, Visitor

  … next()), (req, next) = (req.amount < 5000 ? "👔 manager approved" : next()), (req) = "🏦 needs director approval", ); handle({ amount: 2500 }); // "👔 manager approved …

• AWS Databases: Choose the Right One

  … Redis/Valkey MySQL/PostgreSQL compatible SQL with AWS-managed clustered storage Aurora Do not choose a database because …

• Secrets, Ephemeral Values, and Least Privilege

  Protect credentials and state, distinguish sensitive from ephemeral values, and use provider-supported write-only inputs. Protect the …

• CI/CD and Reviewed Production Changes

  … HCP Terraform can provide managed runs, state, approvals, and policy integrations. If using a hosted execution platform, follow …

• Extending Kubernetes: CRDs, Operators and Admission

  … a controller watches the desired state , compares it with the actual state , and acts to close the gap …

• React vs Vue vs Angular

  … Reactivity Re-render + diff Proxy-based tracking Signals State management Many choices (Zustand, Redux, TanStack Query) Pinia (official …

• Microkernel (Plugin) Architecture

  … Rendering engine, tabs, networking Extensions (ad blockers, password managers) Webpack / Vite / Rollup Module graph + build pipeline Loaders and …

• Scaling, Load Balancing & Rate Limiting

  … Vertical vs horizontal scaling, load balancers, stateless servers, replication, sharding, rate limiting and resilience basics. The big idea …

• Authentication, Authorization & API Security

  … orders of user 42 JWT (stateless tokens) A JSON Web Token carries the user's claims, signed by …

• Resilience, Disaster Recovery and Multi-Region Design

  … handles load (N+1). - Make services stateless ; put state in managed, replicated stores. - Prefer static stability : a system …

• React Hooks in Practice

  … Good for rarely changing values (theme, current user, locale); for fast-changing global state, see State Management . Custom …