AI4XM LTD
Apr 2024 - presentFounding Engineer at AI4XM LTD. Set up infra and coded full-stack. If you sees my job application, that means this project didn't go too well 😅
Hello World
I'm Haochen Xu, a developer who likes building for the web.
I mainly work across frontend and full-stack JavaScript, with a soft spot for interfaces that feel clear, fast, and alive.
This site is where I publish notes from work, side projects, and experiments with visuals, Three.js, and CSS.
I like keeping the code and writing close together. The source for this site lives on GitHub .
Experience
Eventx
Sep 2022 - Apr 2024Full-stack Software Engineer at Eventx.io, a Hong Kong SASS company. Tech stack: TypeScript, PostgresDB, NodeJS, ReactJS, TypeORM.
EPAM
Nov 2020 - Sep 2022Senior Software Engineer at EPAM, a US publicly traded company consulting for Fortune 1000. Tech stack: ReactJS, NodeJS, Typescript, GraphQL.
EPAM
Nov 2019 - Nov 2020Software Engineer at EPAM, a US publicly traded company consulting for Fortune 1000. Tech stack: ReactJS, NodeJS, Typescript, GraphQL.
Got hired by a local startup as a frontend engineer. Tech stack: VueJS, NuxtJS.
2018 - 2019Got hired by a local startup as a frontend engineer. Tech stack: VueJS, NuxtJS.
Decided to pursue programming as a career by learning full-time!
2017 - 2018Decided to pursue programming as a career by learning full-time!
Worked in marketing for a consumer tech company. I was quite interested in consumer electronics at that time. Meanwhile learning to code as a hobby.
2014 - 2017Worked in marketing for a consumer tech company. I was quite interested in consumer electronics at that time. Meanwhile learning to code as a hobby.
Graduated with a college degree, but didn't figure out what I want to do. I guess traditional education and me failed each other.
2008 - 2012Graduated with a college degree, but didn't figure out what I want to do. I guess traditional education and me failed each other.
Recent Writing
Latest notes and experiments
Work Related 1 min read
The first time I use async generator in production code
I used to work for a company that provides exhibition and social event management services. A core feature of our SAAS platform is allowing user to launch email campai...
Work Related
Db 2 min read
DynamoDB
It is a key-value store like an object. Primary key It is a unique identifier for a item in a table. It is the "key" of the item. It must contain a partition key and a...
Db
Dsa 6 min read
I ask ChatGPT to explain the mouse in the maze problem
Me: this is the log: Does the log output make sense to you? ChatGPT: Yes, the output makes sense based on how your maze is generated and solved. Breakdown: Maze Genera...
DsaBacktracking
Dsa 1 min read
Backtracking 🤯
https://leetcode.com/problems/subsets/ Given an integer array nums of unique elements, return all possible subsets (the power set). The solution set must not contain d...
DsaBacktracking