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Alex Mateo

Founder @ Expora — building the visual algorithm learning platform for developers preparing for coding interviews. Prev: full-stack engineer.

Joined on Apr 21, 2026

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Every Backtracking Problem Is the Same Three Lines. I Just Couldn't See the Tree.

Every Backtracking Problem Is the Same Three Lines. I Just Couldn't See the Tree.

#leetcode #career #coding #interview

3 min read

You Know the Coding Patterns. Why Do You Still Freeze in Interviews?

You Know the Coding Patterns. Why Do You Still Freeze in Interviews?

#career #algorithms #beginners #programming

7 min read

The 7 Trigger Questions That Tell You Which Coding Pattern to Use

The 7 Trigger Questions That Tell You Which Coding Pattern to Use

#algorithms #coding #programming #career

7 min read

Dynamic Programming for Coding Interviews: The Execution Gap Nobody Talks About

Dynamic Programming for Coding Interviews: The Execution Gap Nobody Talks About

#programming #algorithms #coding #javascript

7 min read

Why Dynamic Programming Feels Impossible (And the 5 Patterns That Fix It)

Why Dynamic Programming Feels Impossible (And the 5 Patterns That Fix It)

#algorithms #programming #leetcode #datastructures

4 min read

Sliding Window & Two Pointers: The Decision Framework Nobody Teaches You

Sliding Window & Two Pointers: The Decision Framework Nobody Teaches You

#algorithms #programming #career #leetcode

7 min read

Graph Algorithms for Coding Interviews: When to Use BFS, DFS, or Dijkstra

Graph Algorithms for Coding Interviews: When to Use BFS, DFS, or Dijkstra

#algorithms #programming #career #webdev

5 min read

Why LeetCode is So Hard — and Why Grinding More Problems Won't Help

Why LeetCode is So Hard — and Why Grinding More Problems Won't Help

#algorithms #programming #career #productivity

5 min read

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