Linus created Linux. No chasing fame. No slowing down. Just engineering. Real legends never stop being developers.

Interviewer: If an LLM already knows everything , why do we need RAG ?

Top 10 AI Agent Engineering Interview Questions in 2026, please learn: 1. How do you prevent hallucinations in LLM-based applications? 2. How do you design an intent-routing system for an AI Agent? 3. When should you use multiple AI Agents instead of a single Agent? 4. What is the difference between MCP and A2A, and when should you use each? 5. How do you manage context-window limitations in long-running Agent conversations? 6. What is the difference between ReAct and Plan-and-Execute, and when should you use each approach? 7. How do you evaluate an AI Agent's performance and reliability in production? 8. How do you handle tool-call failures, timeouts, retries, and invalid responses in an AI Agent? 9. How would you design a memory system for an AI Agent that retains useful information across conversations? 10. How do you secure a production AI Agent against prompt injection, unauthorized tool execution, and duplicate transactions?

Can I ask a dumb question: If a UUID is “practically impossible” to duplicate, why do we still check for duplicates?

Interviewer: You have 10 million embeddings. You switch to a better embedding model. Can you reuse the existing vectors?

Bro disappeared like he never existed.

A collection of bizzare backend developer requests in 2026 - 1. Just add a field to the database — in reality, 5 tables, 3 APIs, and 2 scheduled jobs later 2. Add an export function, just to export an Excel file — 2 million rows of data, and it ran out of memory (OOM). 3. Add a scheduled task, run it once a day — and then I was woken up by an emergency call at 3 a.m. 4. Security is not an issue, just launch it first — Famous last words 5. Switch the database from Postgresql to MongoDB, because I've heard it's faster." What's the worst "simple" request you've ever gotten? 👇

prove me wrong: - Linux >>> MacOS

Interviewer: How to delete data from a table with tens of millions of records? I almost said: DELETE From....

Interviewer: Your 70B LLM fits on an 80GB GPU. Why does it still run out of memory during inference?

When I asked who emptied my wallet and ordered foods for 10 people😅

The frameworks will change. The languages will change. These 11 skills will keep backend developers relevant in 2026: 1. API Design — REST, GraphQL, gRPC 2. Auth — OAuth2, JWT, OIDC, Passkeys 3. Databases — SQL, NoSQL, sharding, indexing, query tuning 4. Caching — Redis, CDN, edge strategies 5. Event-Driven Systems — Kafka, Pulsar, streaming pipelines 6. Concurrency & Async — Reactive, structured concurrency 7. Distributed Systems — Microservices, service mesh, eventual consistency 8. Security — HTTPS, encryption, Zero Trust, OWASP Top 10 9. Observability — Logs, traces, metrics, OpenTelemetry 10. Cloud & Deployment — Docker, Kubernetes, serverless, GitOps 11. AI Integration — LLM APIs, vector DBs, RAG systems Stop fighting for languages, Java vs Go vs Python.. Master the fundamentals. bookmark it...