Polling vs Long Polling vs WebSockets - When to Use What
You’re building a notification bell. The product team wants it to feel “real-time.” You reach for WebSockets because that’s what every blog …
Read MoreHow to Structure a System Design Interview in 45 Minutes
Most candidates jump to drawing boxes on a whiteboard. Here’s the exact structure, order, and time allocation that turns a chaotic 45 …
Read MoreThe AWS Services You Are Overpaying For Right Now
The average AWS bill has significant waste. Not because teams are careless, but because AWS pricing is complex, defaults favor AWS revenue, …
Read MoreGetting Started with Claude Code: The AI Coding Tool That Actually Delivers
Claude Code isn’t just another AI assistant. It’s a full-blown coding partner that lives in your terminal. Here’s how to get started and why …
Read MoreBack of Envelope Calculations in System Design
Most candidates either skip estimation entirely or spend five minutes doing exact math. Here’s how to do quick, high-signal capacity …
Read MoreHow to List Non-Functional Requirements in System Design
Saying ’the system should be scalable and highly available’ is not an NFR. Here’s how senior engineers define NFRs that actually drive …
Read MoreHow to List Functional Requirements in System Design
Most candidates list features. Senior engineers define the system’s contract. Here’s a framework to get FRs right - with examples, …
Read MoreGemini 3.1 Pro - Everything You Need to Know
Google just dropped Gemini 3.1 Pro - doubling reasoning performance, topping most benchmarks, and costing 7x less than competitors. Here’s …
Read MoreSQL vs NoSQL: A Practical Guide to Picking the Right Database
A deep, practical guide to SQL vs NoSQL databases. Not textbook definitions - real trade-offs, real examples, and a decision checklist that …
Read MoreHow Supabase Is Beating Firebase at Its Own Game
Firebase was the default backend-as-a-service for a decade. Real-time database, authentication, storage, and hosting in one product with a …
Read MoreThe Open Source Model That Beat GPT-4o at Half the Cost
Several open-weight models now match or exceed GPT-4o on specific benchmarks while running on hardware you can rent for $2/hour. Here is …
Read MoreThe AWS Bill That Shocked a $10M Startup
A well-funded startup with 50,000 users received a $47,000 AWS bill for a single month. The causes were preventable. Here is what happened …
Read MoreWhat It Takes to Run an AI Model: The Full Hardware Stack and Who Benefits
Every time ChatGPT answers a question, it touches 7+ layers of hardware - from GPUs to cooling systems. Here’s the complete AI …
Read MoreAWS Lambda Cold Starts Are Still a Problem - Here Is the Fix
Lambda cold starts have been “solved” multiple times and are still causing P99 latency spikes in production. Here is what actually works in …
Read MorePython 3.13 Changed Everything - Here Is What Matters
Python 3.13 shipped the biggest performance and concurrency improvements in the language’s history. Here is what actually changed and how to …
Read MoreWhy the Vector Database Market Is Already Consolidating
In 2023, every AI investor was looking for the vector database play. Pinecone, Weaviate, Qdrant, Chroma, Milvus, LanceDB, Marqo, Vald, …
Read MoreHow Sentry Changed Observability for Small Teams
Sentry was founded in 2008 as a Django error logger. It has spent the last decade becoming something larger: an observability platform …
Read MoreWhy Every Go Developer Should Understand the Runtime Scheduler
Go’s goroutines feel like magic. You launch thousands of them, they work, they scale. Until they do not. Understanding the runtime scheduler …
Read MoreThe JavaScript Framework That Finally Got Server Components Right
React Server Components are the idea. The implementation story is messier. Here is how different frameworks in the ecosystem handle them and …
Read MoreClaude vs GPT-4o vs Gemini: A Benchmark That Actually Matters
MMLU scores tell you almost nothing about which LLM to use in production. Here is an evaluation framework based on tasks that engineers …
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