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Lessons (40)
- Your Practical Kubernetes Workflow
Use Helm to package YAML, GitOps to deploy from Git, and a small kubectl toolkit to operate an …
- AI Agents and Tool Use
Understand tool-calling loops, bounded autonomy, state, approvals, and when a simple workflow is better than an agent …
- Event-Driven Patterns, Step Functions and Reliable Lambdas
Build resilient serverless workflows with retries, dead-letter queues, idempotency, fan-out and orchestration. Messages are delivered at …
- Concurrency, Resilience & Distributed Workflows
Keep backend systems correct under contention, failure and traffic spikes with idempotency, retries, circuit breakers, workers, webhooks, backpressure …
- Terraform: Start Here
Understand infrastructure as code, the plan/apply workflow, and the learning path from local experiments to team operations …
- CI/CD and Reviewed Production Changes
Design an automated plan and apply workflow with protected credentials, saved plans, serialization, and drift checks. A useful …
- Architecture Patterns at Scale
… First danger --- --- --- Modular monolith Early product / tightly coupled workflow Hidden module coupling Microservice Independent team and scaling boundary …
- Secrets, Ephemeral Values, and Least Privilege
… provider-supported write-only inputs. Protect the whole workflow Secrets can appear in variable files, state, plan files …
- SQL Interview Query Drills
… Covers PDF questions 23, 25 and 26. .
- AWS Security Building Blocks
… Merely changing a stored password is not a complete database rotation workflow: the database and application must coordinate …
- S3: Store Files Safely
… size and contents as part of the upload workflow. A client-provided content type alone does not prove …
- Time, Consistency and Distributed Transactions
… Require valid state transitions and no stale-owner writes; measure unresolved workflow age and compensation failures. Check your …
- Imports, Moved Blocks, and Safe Refactoring
… Import blocks make adoption reviewable through the plan/apply workflow. Provider docs define the import ID; different resource …
- Design a File Storage Service
… A contractor’s access is revoked midway through a download workflow. What must be true Support resumable uploads …
- Multi-Region and Disaster Recovery
… It is easier to reason about and often the right answer for money/order workflows. Active-active means …
- Drift, Troubleshooting, and Disaster Recovery
… Prefer this to the older taint workflow. -target is an exceptional recovery tool. It produces a partial view …
- What Is Artificial Intelligence? A Developer's Guide
… evidence before generating Execute a refund Authorized business workflow Money movement must follow enforced rules For a bookstore …
- Which Pattern Do I Need?
… 🗺️ Strategy — pluggable algorithms (payments, pricing, auth) 7. 🚦 State — order and payment workflows 8. 📞 Chain of Responsibility — request …
- AI Specialties and Real-World Examples
… Choose the output your workflow actually needs. For a warehouse camera, split data by relevant conditions such as …
- Code Smells & Refactoring
… related code lives together"] Ch2[Add a currency] -- m[money.js] end A safe refactoring workflow 1. Make …
- Behavioral Patterns I: Observer, Strategy, Command, State
… state machines, TCP connection states, order and payment workflows. 💡 State vs Strategy: they look the same in code …
- Layered (N-Tier) Architecture
… controllers, CLI Business (service / application) Business rules and workflows OrderService.placeOrder() Persistence (data access) Read and write data …
- Multi-Account Strategy, Governance and Security Operations
… secret Deployment Approved pipeline changes its stack Unapproved workflow cannot assume deploy role Use a sandbox OU for …
- Event-Driven Architecture
… where the added complexity isn't earned, and workflows needing strict, immediate consistency. Key takeaways - Components publish facts …
- Dynamic Programming
… choices at each step that affect the future. 💡 Workflow that always works: write the plain recursive solution → notice …
- CloudFront: Faster Websites and Safer File Delivery
… a dedicated lab distribution according to the console workflow, then remove its dedicated origin objects/bucket. Distribution deployment …
- Code Profiling
… Learn a repeatable profiling workflow for CPU, memory, I/O and real user requests. The big idea Profiling …
- EC2, Storage and Auto Scaling
… one instance using the group's ordinary replacement workflow. Confirm that the new instance starts without manual SSH …
- AWS: Start Here
… If your organization does not use Identity Center, follow its approved temporary-credential workflow instead. Expected result: you …
- AWS Interview Questions: Clear Answers
… Write policies with the exact actions and ARNs needed, then test the expected workflow. I treat AccessDenied as …
- C4 Architecture Diagrams: Context, Container, Component and Code
… against a shared interface. - A complex algorithm or workflow needs a compact map before a risky change. Avoid …
- Practical Project: Deploy a Real CRM App on EKS
… Troubleshooting workflow Always diagnose in the same order, from the cluster down to the container: bash kubectl get …