Justin Welch
Senior Full Stack Engineer at AppMakers USA
Asheville, North Carolina, United States
Summary
👤
Senior🎓
Top SchoolJustin Welch is a Senior Full Stack Engineer and technical leader with nearly two decades of experience building scalable systems across AI-driven products, blockchain protocols, and consumer apps. He has led engineering teams and architected end-to-end platforms—from LLM-powered creator tooling and internal AI pipelines to feeless NFT marketplaces and multiplayer VR games—often contributing hands-on across React/TypeScript frontends, Node.js/Python backends, and smart contracts. Justin has shipped high-impact projects like the first Koinos NFT marketplace (authoring the KCS-2 standard) and contributed to the Steem ecosystem’s condenser and steem-js repos while leading a large infrastructure migration covered by Forbes. Comfortable as Head of Engineering or a founding engineer, he excels at systems thinking that marries infrastructure, automation, and product UX to reduce friction at scale. Based in Asheville, NC, he favors clean abstractions and pragmatic shipping—whether building delegated authority for Web3 games or integrating LLMs into creator platforms.
9 years of coding experience
10 years of employment as a software developer
Associate's degree Information Technology, Associate's degree Information Technology at Asheville-Buncombe Technical Community College
English
Github Skills (14)
nodejs10
javascript10
st10
react10
blockchain10
steemit10
jsx9
server-side9
apidoc9
api9
json-rpc9
websocket8
clustering8
testing7
Programming languages (12)
Github contributions (5)
steemit/steem-js
Jul 2017 - Aug 2019
Steem.js the official JavaScript library for Steem blockchain
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 9 commits, 10 PRs in 2 years 1 month
Contributions summary:Justin primarily focused on improving the Steem.js library by addressing JSON-RPC compatibility issues and implementing enhancements related to network configuration. Their work included refactoring code to align with the JSON-RPC specification and modifying transport options, specifically the handling of URLs and websocket connections. Additionally, the user was involved in adjusting test files and skipping tests for the specific blockchain version.
javascript-libraryjavascriptblockchainsteem-blockchainsteem
steemit/condenser
Feb 2017 - May 2020
The greatest application front-end to the Steem Blockchain.
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:215 commits, 163 PRs, 180 pushes in 3 years 3 months
Contributions summary:Justin contributed to the condenser application's front-end and backend functionality. They added request timing logging, hardware stats tracing, and basic clustering support to the server-side code. Furthermore, they addressed UI/UX elements through grammar fixes and implemented features related to JSONRPC configurations and environment variables across both the front-end and back-end, demonstrating full-stack capabilities.
social-networkreactblockstacksteemitethereum
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.