Joshua J.
Senior AI Engineer | Web3
Hi, I'm Josh, a Senior AI Engineer focused on agent systems, MCP servers, and blockchain. Over four years I've shipped production work contributing to $6M+ in client revenue across DeFi, fintech, and agent infrastructure. My expertise includes: AI Agent Development: Proficient in LangChain, LangGraph, MCP, Anthropic Claude API, and OpenAI API, with experience in building multi-agent systems and evaluation pipelines. MCP Server Development: Experienced in building custom MCP servers with Python and FastAPI, supporting OAuth flows and multiple transport options. Blockchain Development: Proficient in Solidity, Hardhat, Foundry, and The Graph Protocol, with experience in smart contract development, decentralized exchanges, and full Layer 1 implementations. Full-Stack Development: Skilled in React, Next.js, Node.js, TypeScript, and AWS, building production interfaces and backend services for AI-native and Web3 applications. If you've got an AI agent, MCP server, or smart contract project in mind, message me with what you're trying to build.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $4.5k
Billed in all: $24,228$24k
$4.5k in the last 6 months
Earnings, last 30 days
Skill rankings: Top 8% in Solidity
Ranked by MRR among everyone on Upwork with the skill.
- #41Blockchain Architecture305 freelancers · 🇺🇸 #4Top 13%🇺🇸#4 of 24
- #41Pinecone202 freelancers · 🇺🇸 #5Top 20%🇺🇸#5 of 13
- #68Solidity849 freelancers · 🇺🇸 #11Top 8%🇺🇸#11 of 74
- #157Blockchain1,753 freelancers · 🇺🇸 #14Top 9%🇺🇸#14 of 162
- #457GraphQL3,403 freelancers · 🇺🇸 #26Top 13%🇺🇸#26 of 197
- #486Prompt Engineering2,859 freelancers · 🇺🇸 #73Top 17%🇺🇸#73 of 362
- #514AI Consulting2,321 freelancers · 🇺🇸 #167Top 22%🇺🇸#167 of 642
- #566NestJS3,757 freelancers · 🇺🇸 #23Top 15%🇺🇸#23 of 94