The Real Cost of Running LLMs in Production in 2026
Every team building with LLMs eventually hits the same wall: the demo costs $0.02 per request, but production costs $0.50. The gap between …
Read MoreVector Databases in 2026 - Pinecone vs Weaviate vs pgvector Compared
The vector database market exploded in 2023, consolidated through 2024-2025, and has now settled into a clear hierarchy. If you are building …
Read MoreWhen NOT to Use AI for Code - The Tasks That Still Need a Human in 2026
AI code generation in 2026 is genuinely impressive. Models write working implementations, catch bugs, refactor with precision, and produce …
Read MoreWhy Every Backend Team Is Moving to Event-Driven Architecture in 2026
Event-driven architecture is not a buzzword anymore. It is how teams decouple services, handle eventual consistency, and build systems that …
Read MoreWhy SQLite Is Replacing Postgres for More Use Cases Than You Think
The conventional wisdom is simple: SQLite is for development and mobile, Postgres is for production. This was true for a long time. It is …
Read MoreThe Real Cost of Running Production Systems
You just shipped a new service. It works. The demo went great. Leadership is happy. Then the bill arrives - not just the AWS invoice, but …
Read MorePostgreSQL Is All You Need (Until It Isn't)
You’re three months into a new project. You have a PostgreSQL database for your core data, Redis for caching, Elasticsearch for search, …
Read MoreSystem Design Roadmap - What to Learn in What Order
You have 47 browser tabs open. One is a YouTube video on consistent hashing. Another is a blog post about CAP theorem. Somewhere in the mix …
Read MoreHow to Integrate the ChatGPT API - A Complete Guide for Developers
You’ve used ChatGPT through the web interface. Now you want to build it into your own app - a customer support bot, a code review tool, a …
Read MoreHow Redis Went from Single-Threaded to 3.5 Million Ops/Sec
“Redis is single-threaded.” You’ve heard this in every system design interview, every blog post, every tech talk. It was true in 2009. It’s …
Read MoreRedis Internals - Clustering, Sentinel, Sharding, and Pipelining Explained
You spin up a single Redis instance, throw your session data in it, and everything works great. Then your app grows. One day Redis goes down …
Read MoreDatabase Ops/Sec and Memory Limits - When to Shard and When Not To
You’re in a system design interview. You say “we’ll use PostgreSQL” and immediately follow it with “and we’ll shard it across 16 nodes.” The …
Read MorePolling 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 …
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