--- title: "Kehinde Jejelaye (@KehindeJejelaye) | Hashnode" description: "Fullstack JavaScript & .NET Developer | There's more to me than meets the eye. Read the latest articles by Kehinde Jejelaye on Hashnode." url: "https://hashnode.com/@KehindeJejelaye" --- @KehindeJejelaye # Kehinde Jejelaye @KehindeJejelaye · Joined August 2022 Fullstack JavaScript & .NET Developer | There's more to me than meets the eye. ### [Your Server Is Under Attack. Here's How I Built Something That Fights Back.](https://kehindejejelaye.hashnode.dev/your-server-is-under-attack-here-s-how-i-built-something-that-fights-back?utm_source=hashnode&utm_medium=feed) A beginner-friendly walkthrough of sliding windows, statistical baselines, and automatic IP blocking with iptables The challenge was straightforward to describe and deceptively hard to build: watch 10 min read · [kehindejejelaye.hashnode.dev](https://kehindejejelaye.hashnode.dev/your-server-is-under-attack-here-s-how-i-built-something-that-fights-back?utm_source=hashnode&utm_medium=feed) [Apr 29](https://hashnode.com/posts/your-server-is-under-attack-here-s-how-i-built-something-that-fights-back/69f1e049ad6e531c72ac76ab) ### [HNG 12 - First DevOps Task](https://kehindejejelaye.hashnode.dev/hng-12-first-devops-task?utm_source=hashnode&utm_medium=feed) Introduction HNG 12 commenced this week and it’s already buzzing with activities and tons of messages. If you must know, I am quite interested because here I get to validate my knowledge—I assumed you wanted to know, gotcha! Anyway, my first task was... 4 min read · [kehindejejelaye.hashnode.dev](https://kehindejejelaye.hashnode.dev/hng-12-first-devops-task?utm_source=hashnode&utm_medium=feed) [Jan 30, 2025](https://hashnode.com/posts/hng-12-first-devops-task/679bfdb9660245b4009d9c29) ### [Big O Notation: A Simple Guide To A Terrifying Topic](https://kehindejejelaye.hashnode.dev/big-o-notation-a-simple-guide-to-a-terrifying-topic?utm_source=hashnode&utm_medium=feed) Kehinde Jejelaye, Big O Notation, Big O, Algorithms, Simple guide to big o notation 4 min read · [kehindejejelaye.hashnode.dev](https://kehindejejelaye.hashnode.dev/big-o-notation-a-simple-guide-to-a-terrifying-topic?utm_source=hashnode&utm_medium=feed) [Mar 21, 2023](https://hashnode.com/posts/big-o-notation-a-simple-guide-to-a-terrifying-topic/641995c86adbbf5eeaef9524) ### [Recursion in Action: Solving the Binary Search Problem](https://kehindejejelaye.hashnode.dev/recursion-in-action-solving-the-binary-search-problem?utm_source=hashnode&utm_medium=feed) In a minute, you are going to see how to perform the binary search algorithm using recursion but, before we do that, let us touch on recursion - what it is, and how it works on a fundamental level. Ready? Then let's go. What is Recursion? Broken to p... 6 min read · [kehindejejelaye.hashnode.dev](https://kehindejejelaye.hashnode.dev/recursion-in-action-solving-the-binary-search-problem?utm_source=hashnode&utm_medium=feed) [Mar 9, 2023](https://hashnode.com/posts/recursion-in-action-solving-the-binary-search-problem/6409c4df838fd6bc2ac036fd) ### [Mastering Binary Search: A Simple Guide](https://kehindejejelaye.hashnode.dev/mastering-binary-search-a-simple-guide?utm_source=hashnode&utm_medium=feed) Two of the most performed operations in the world of Computer Science are searching and sorting. It follows then that understanding how to search for data and how to sort data is crucial. In my last post, you saw and understood the Linear Search Algo... 5 min read · [kehindejejelaye.hashnode.dev](https://kehindejejelaye.hashnode.dev/mastering-binary-search-a-simple-guide?utm_source=hashnode&utm_medium=feed) [Mar 5, 2023](https://hashnode.com/posts/mastering-binary-search-a-simple-guide/6404e0384b29cbf0124d45db)