
Josh Choi
Verified Expert in Engineering
Full-stack Developer
New York, NY, United States
Toptal member since October 13, 2022
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
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
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
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.
Full-stack React Developer
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.
Senior React Developer
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.
Founder
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.
Co-founder | CTO
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.
Data Analyst
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.
Experience
Vandra
https://www.vandra.ai/REITIUM
https://reitium.com/Mogle
https://mogleapp.com/Mobo.XYZ
Slant
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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