Josh Choi, Developer in New York, NY, United States
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Josh Choi

Verified Expert  in Engineering

Full-stack Developer

New York, NY, United States

Toptal member since October 13, 2022

Expertise
Full-stackFront-endBack-end DevelopersCSSJavaScriptReact.jsNode.jsPythonSQLMongoDBPostgreSQLBootstrapTypeScriptNext.js
Bio

Josh is a graduate of Columbia University and is a full-stack developer and founder with over seven years of 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 (AWS and GCP), smart contracts, and programs for blockchains (Ethereum and Solana).

Portfolio

JCLVSH
Freelancing, Product Development, CSS, HTML, JavaScript, TypeScript, React...
1848 VENTURES LLC
CSS, HTML, React, JavaScript, Python, Shopify, API Integration, Flask, Back-end...
REITIUM Technologies Inc.
React, Next.js, TypeScript, Tailwind CSS, MongoDB, REST APIs

Experience

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

Availability

Full-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, X (formerly 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, Web3, Back-end, Back-end Development, Puppeteer

Full-stack React Developer

2023 - 2024
1848 VENTURES LLC
  • Developed full-stack front ends and back ends for a consumer-facing Shopify extension, merchant admin portal, and Vandra admin portal in primarily React, Python, PostgreSQL, and APIs such as Shopify.
  • Developed a data pipeline and machine learning models using H2O to inform AI-driven discounting decisions for a Shopify extension.
  • Developed microservices to automate processes like syncing orders, calculating performance analytics for merchants, and managing data pipelines for machine learning models.
Technologies: CSS, HTML, React, JavaScript, Python, Shopify, API Integration, Flask, Back-end, Back-end Development

Senior React Developer

2022 - 2023
REITIUM Technologies Inc.
  • Developed the front end for the consumer-facing real estate investment platform in Next.js, TypeScript, and Tailwind CSS.
  • Developed features including authentication, onboarding, investment flow, and payment flow.
  • Worked closely with a group of two other developers in sprints.
Technologies: React, Next.js, TypeScript, Tailwind CSS, MongoDB, REST APIs

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, Web3, Back-end, Back-end Development, Puppeteer

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, Back-end, Back-end Development

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

Vandra

https://www.vandra.ai/
Contracted as the lead full-stack engineer from March 2023 to May 2024 and helped them successfully raise their $6 million seed round in Q1 2024. I delivered a full-stack Shopify Theme extension, Shopify Checkout extension, merchant portal, and admin portal so that Vandra could provide AI-driven discounting to Shopify merchants.

REITIUM

https://reitium.com/
Contracted as a senior React developer from October 2022 to January 2023. I delivered a full-stack consumer-facing real estate investment platform using React, Redux, TypeScript, Tailwind CSS, and Next.js.

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

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

Libraries/APIs

React, Node.js, Scikit-learn, Web3.js, Puppeteer, NumPy, SciPy, X (formerly Twitter) API, jQuery, Vue, Matplotlib, REST APIs

Tools

Figma

Languages

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

Storage

MongoDB, PostgreSQL, NoSQL, MySQL, Amazon DynamoDB

Frameworks

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

Paradigms

Automation, REST, Management

Platforms

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

Other

Full-stack, Front-end, Back-end, Back-end Development, APIs, User Experience (UX), User Interface (UI), Web & Mobile Applications, Web3, 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, API Integration

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