Built by ex-FAANG / MAANG engineers
Practice the interview,
not just the problem.
Solve. Explain. Get challenged. Improve. Repeat. Tell us when your interview is and get a day-by-day program — real problems with hidden tests in 21 languages, system design under interviewer pressure, and AI mocks that push back.
75
Problems with hidden test suites
45
Guided interview simulations
21
System Design Case Studies
21
Programming Languages
One simple price
Every problem, case study and walkthrough is free — no subscription, no membership. You pay only for a graded interview, and your first one is free.
Your Prep Journey
Data Structures & Algorithms
Arrays through red-black trees, code in 3 languages
System Design Case Studies
Bitly to LLM inference serving at scale
AI Mock Interview
Live conversation, graded like a real panel
Walk in ready
Every round covered, start to staff+
Covers interview patterns asked at
Interview Mode
All learning content is free. Pay only for interviews.
Every case study, walkthrough, all 75 problems and all 45 interview simulations are free forever. When you want the real thing — an AI interviewer that challenges your approach, hidden tests, a hire/no-hire report — your first interview is free, then €10 per practice session or €30 per full simulation. No subscription, and no membership on sale. See the full pricing.
New - Premium Labs
Deep dives on caching, CDNs, AI agents, and systems languages
Free narrative walkthroughs, diagrams, and interview prompts on the architectures senior engineers discuss every week.
Caching & Redis
Redis-Powered Caching Playbook
Design write-through, write-back, and request coalescing layers that keep tail latency predictable even when upstream databases run hot.
Pick the right eviction strategy (LRU, LFU, TTL buckets) based on key churn.
Model cache warming, fill retries, and cache stampede protection with Redis primitives.
Instrument cache hit ratios by route and fall back smoothly when Redis is degraded.
CDN & Edge
Modern CDN Internals
Explain TLS termination, POP hierarchy, and cache invalidation with the rigor expected from staff-level system design interviews.
Describe how edge POPs negotiate SSL, compress assets, and stream video segments.
Model regional failover plans when an entire ISP or POP cluster goes dark.
Map CDN observability: RUM beacons, synthetic probes, and log aggregation.
AI Agents
LangChain Agent Patterns
Ship reliable AI copilots by mixing tool calling, memory stores, and guardrails across LangChain’s abstractions.
Pick the right agent executor (ReAct, OpenAI Tools, Multi-Vector) for each workflow.
Persist short- and long-term memory with Redis, Postgres, or Chroma.
Add guardrails (output validators, semantic filters) before returning responses.
Interview Prep Hub
Beginner to Staff+ interview preparation
Quick links into AlgoMindset's most popular tracks. Mix and match algorithms refreshers, FAANG-ready system design, and AI-agent labs to cover every round.
Data Structures & Algorithms
Beginner-friendly roadmap
Master arrays, graphs, DP, and sliding window patterns with annotated code in JavaScript, Python, and Go.
System Design & FAANG
War room case studies
Practice sizing, API design, and failure drills with case studies on Bitly, Uber, YouTube, LinkedIn, and more.
AI Agents & Automation
LangChain, LangGraph, n8n
Build production-grade copilots and automations with tool calling, memory stores, guardrails, and orchestration.
Career Stories
Behavioral & negotiation prep
Use the newsletter + premium prompts to rehearse STAR stories, leadership principles, and offer discussions.
FAQ
Frequently asked questions
Is AlgoMindset free to use?
Yes. The data structures roadmap, all 75 essential problems with the in-browser judge, the interview question bank, the system design case studies, guided practice, and the blog are free. You pay only for AI interviews: your first one is free, then €10 per practice session or €30 per full simulation — no subscription.
What do paid interview sessions include?
Every session runs Interview Mode: an AI interviewer that makes you state your approach before the editor unlocks, challenges your reasoning, runs your code against a full hidden test suite in a live editor, applies time pressure, and ends with an 8-dimension hiring report — verdict with evidence, your biggest issue, and targeted practice assignments. €10 practice sessions and €30 full simulations; your first interview is free. Anyone who bought a legacy lifetime membership keeps unlimited access.
How do the AI mock interviews work?
You choose a company tier (FAANG, MAANG, mid-tier, or startup-style), an interview type (DSA, system design, behavioral, or experience-based), and a difficulty level. An AI interviewer asks questions and pushes follow-ups based on your answers, and coding rounds include a live editor with runnable tests. Every session ends with a hire/no-hire style verdict, a strengths-and-weaknesses breakdown, and a performance heatmap.
What topics does AlgoMindset cover?
Data structures and algorithms from arrays through red-black trees and heaps, 60+ curated interview questions grouped by pattern, system design case studies spanning classic infrastructure like Bitly, Uber, and YouTube alongside 2026-era AI infrastructure like RAG pipelines, multi-agent orchestration, and LLM inference serving, and a blog covering AI engineering and FAANG interview prep.
Is the content updated for AI and agentic system design interviews?
Yes. AlgoMindset added dedicated system design labs for multi-agent AI orchestration, retrieval-augmented generation (RAG) pipelines, and LLM inference serving at scale specifically to match what AI-engineering interviews ask in 2026, alongside the classic system design case studies.
How is AlgoMindset different from a plain question bank like LeetCode?
A plain question bank is primarily a problem-solving practice tool. AlgoMindset pairs the same kind of question bank with full interviewer-dialogue walkthroughs, system design case studies with architecture breakdowns, and AI mock interviews that grade spoken and typed answers the way a real interview panel would, not just whether the code passes tests.