Josh is available for hire

Josh Choi

Verified Expert in Engineering

Full-stack Developer

Location

New York, NY, United States

Toptal Member Since

October 13, 2022

Josh is a graduate of Columbia University and a full-stack developer with over six years of freelancing experience. His skills include designing front ends in languages like React, developing back ends in languages like Node.js and Python, and integrating services and APIs like Stripe and Alchemy. Josh has worked with databases like MongoDB and DynamoDB and deployed apps to cloud service platforms like AWS and GCP and smart contracts and programs to blockchains like Ethereum and Solana.

Full-stack Front-end CSS React Node.js Python SQL MongoDB User Experience (UX)User Interface (UI)PostgreSQL Bootstrap TypeScript Next.js Flask

Portfolio

JCLVSH

Freelancing, Product Development, CSS, HTML, JavaScript, TypeScript, React...

Mogle

JavaScript, React, Redux, Node.js, Express.js, Python, Flask, NumPy, SciPy...

Slant

JavaScript, jQuery, Vue, PHP 7, SQL, MySQL, Amazon Web Services (AWS)...

Experience

React - 6 years SQL - 6 years Python - 6 years Node.js - 6 years MongoDB - 6 years Amazon Web Services (AWS) - 4 years Solidity - 2 years Ethereum - 2 years

Availability

Part-time

Preferred Environment

React, Node.js, Python, MongoDB, Amazon Web Services (AWS), Ethereum, Solidity, JavaScript, TypeScript, SQL

The most amazing...

...project I've managed was an experiment titled "The Effect of Microgravity on Chryseobacterium Aquaticum" that was sent to the International Space Station.

Work Experience

Founder | Freelancer

2016 - PRESENT

JCLVSH

Developed and deployed full-stack products and applications for clients.
Managed product teams and oversaw development for clients.
Taught programming and acoustic and electric guitar lessons for clients.

Technologies: Freelancing, Product Development, CSS, HTML, JavaScript, TypeScript, React, React Native, Next.js, Node.js, NestJS, Python, Flask, Scikit-learn, SQL, MongoDB, Amazon Web Services (AWS), Google Cloud Platform (GCP), Ethereum, Solidity, Redux, Express.js, NumPy, SciPy, NoSQL, Twitter API, Management, Customer Research, Fundraising, jQuery, Vue, PHP 7, MySQL, Matplotlib, Product Management, Web Marketing, Sales, Blockchain, Smart Contracts, DApps, APIs, Non-fungible Tokens (NFT), Amazon DynamoDB, Decentralized Finance (DeFi), ERC-721, Decentralized Applications, Decentralized Autonomous Organizations (DAO), ERC-20, Web3.js, User Experience (UX), User Interface (UI), Automation, REST, PostgreSQL, GraphQL, Bootstrap, Full-stack, Web & Mobile Applications, Front-end, Figma

Founder

2021 - 2022

Mogle

Managed a team of four people to develop and deploy a full-stack application in React, Node.js, Python, and DynamoDB to AWS.
Researched users and customers to iterate on the product based on feedback.
Oversaw marketing, sales, and fundraising for the product.

Technologies: JavaScript, React, Redux, Node.js, Express.js, Python, Flask, NumPy, SciPy, NoSQL, Amazon DynamoDB, Amazon Web Services (AWS), Blockchain, Ethereum, Smart Contracts, Solidity, Decentralized Applications, DApps, Decentralized Autonomous Organizations (DAO), Decentralized Finance (DeFi), ERC-20, ERC-721, Non-fungible Tokens (NFT), Management, Product Management, Customer Research, Web Marketing, Sales, Fundraising, CSS, HTML, Scikit-learn, Web3.js, User Experience (UX), User Interface (UI), Automation, REST, PostgreSQL, GraphQL, Bootstrap, Full-stack, Web & Mobile Applications, Front-end, Figma

Co-founder | CTO

2019 - 2019

Slant

Managed a team of two to develop and deploy a full-stack application in Vue, PHP, and MySQL to AWS.
Researched users and customers to iterate on the product based on feedback.
Oversaw marketing, sales, and fundraising for the product.

Technologies: JavaScript, jQuery, Vue, PHP 7, SQL, MySQL, Amazon Web Services (AWS), Management, Product Management, Customer Research, Web Marketing, Sales, Fundraising, CSS, HTML, User Experience (UX), User Interface (UI), REST, PHP, PostgreSQL, Bootstrap, Full-stack, Web & Mobile Applications, Front-end, Figma

Data Analyst

2016 - 2017

NASA

Analyzed a relationship between rainfall and vector-borne disease, malaria, at four locations in Kenya from 2014 to 2017 using station and satellite data.
Researched for a study "Climate and Human Health in Africa: Analysis of Climate Conditions and the outbreak of Mosquitoes Between 2014 and 2015."
Spoke at the 2016 National Space Club Youth Education Luncheon for the National Space Club and Foundation Scholars program.

Technologies: Python, Matplotlib, User Experience (UX), User Interface (UI)

Experience

Mogle

https://mogleapp.com/

A product suite for freelancers in Web3. I managed a team of four to develop and deploy a full-stack application in React, Node.js, Python, and DynamoDB to AWS and smart contracts in Solidity to Ethereum and Polygon. Its features include wallet authentication, a product dashboard, on-chain income analytics, and an NFT marketplace.

Mobo.XYZ

https://mobo.xyz/

The best link-in-bio tool for NFT creators to manage and analyze their creations across different marketplaces like OpenSea, Rarible, and LooksRare. I developed and deployed a full-stack application MVP in React, Node.js, and MongoDB to AWS from scratch within two months. Its features include Twitter and wallet authentication, a product dashboard, customizable profiles, and NFT sales and transaction analytics.

Slant

A media platform to gauge public opinion on topics ranging from politics to film. I managed a team of two to develop and deploy a full-stack application in Vue, PHP, and MySQL to AWS. Its features include email authentication, customizable profiles, content search, posts, comments, likes, polls, notifications, inbox messaging, and account settings. I was also heavily involved in customer research and iterating on the product based on feedback.

Skills

Languages

JavaScript, Python, SQL, CSS, HTML, TypeScript, Solidity, PHP 7, PHP, GraphQL

Libraries/APIs

React, Node.js, Scikit-learn, Web3.js, NumPy, SciPy, Twitter API, jQuery, Vue, Matplotlib

Storage

MongoDB, PostgreSQL, NoSQL, MySQL, Amazon DynamoDB

Other

Full-stack, Front-end, APIs, User Experience (UX), User Interface (UI), Web & Mobile Applications, Customer Research, Fundraising, Product Management, Web Marketing, Sales, Smart Contracts, DApps, Non-fungible Tokens (NFT), Decentralized Finance (DeFi), ERC-721, Decentralized Applications, Decentralized Autonomous Organizations (DAO), ERC-20, Freelancing, Product Development

Frameworks

React Native, Next.js, Flask, Bootstrap, NestJS, Redux, Express.js

Tools

Figma

Paradigms

Automation, REST, Management

Platforms

Amazon Web Services (AWS), Ethereum, Google Cloud Platform (GCP), Blockchain