@trekhleb

Oleksii Trekhleb

@trekhlebAmsterdamJoined May 2018

Software engineer @ Uber

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Oleksii Trekhleb's blogs

trekhlebtrekhleb.hashnode.dev10 posts

API Design of X (Twitter) Home Timeline

When it comes to designing the API of the system the software engineers often consider different options like REST vs RPC vs GraphQL (or other hybrid approaches) to determine the best fit for a specific task or project. In this article, we explore ho...

Dec 13, 2024 · 19 min readtrekhleb.hashnode.dev

System Design Sketches

System design sketches for popular system design interview questions. See the sketches in full resolution at okso.app/showcase/system-design https://www.youtube.com/watch?v=d0_XAN29g7U Social Network Functional requirements: ---------------------...

Jul 15, 2024 · 5 min readtrekhleb.hashnode.dev

Data Structure Sketches

Recently I launched the minimalistic online drawing app okso.app. I wanted it to be a place where people could do fast, ad-hoc, napkin-based-like explanations of any concept as if you are sitting with your friend and trying to explain him/her somethi...

Aug 31, 2022 · 2 min readtrekhleb.hashnode.dev

Ok! So... Draw to explain. Draw to grasp.

TL;DR The OkSo app is the drawing app to express, grasp, and organize your thoughts and ideas. Draw to explain. Draw to grasp. Concept Some of you are visual learners. You need to see pictures and visualizations to explain and grasp concepts. You k...

Jul 21, 2022 · 5 min readtrekhleb.hashnode.dev

Weighted Random in JavaScript

ℹ️ Examples are from the javascript-algorithms repository What is "Weighted Random" Let's say you have a list of items. Item could be anything. For example, we may have a list of fruits and vegetables that you like to eat: [ '🍌', '🍎', '🥕' ]. The ...

Oct 22, 2021 · 5 min readtrekhleb.hashnode.dev

Oleksii Trekhleb

About

Available for

Oleksii Trekhleb's blogs

API Design of X (Twitter) Home Timeline

System Design Sketches

Data Structure Sketches

Ok! So... Draw to explain. Draw to grasp.

Weighted Random in JavaScript

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Oleksii Trekhleb

About

Available for

Oleksii Trekhleb's blogs

API Design of X (Twitter) Home Timeline

System Design Sketches

Data Structure Sketches

Ok! So... Draw to explain. Draw to grasp.

Weighted Random in JavaScript