Coding interview platform
9,500+ problems. Write, run and test in 17 languages, in the browser.
What's inside
- Problem Vault — 9,500+ problems by topic, list and difficulty
- SolveMe — Run code in 17 languages, tests on every run
- ScoreMe — Timed assessments, hidden tests, Big-O fit
- AI coach — Hints and code review, never the answer
Start with these
- Two Sum — Easy · Arrays & Hashing
- Valid Parentheses — Easy · Stack
- Group Anagrams — Medium · Arrays & Hashing
- Merge Intervals — Medium · Intervals
- LRU Cache — Medium · Design
- Number of Islands — Medium · Graphs
- Course Schedule — Medium · Graphs
- Coin Change — Medium · Dynamic programming
The rest of Cariara
- System design — Design studio · 270+ topics · AI review
- AI copilot — Mock interviews, solutions explained, stories
- Practice ground — Real machines · Kubernetes, Linux, cloud
Start free on Cariara · Coding problems · System design studio