Chinyere John-nna

I've delivered three production web applications spanning Web3, AI, and real-time analytics, using React, TypeScript, and Next.js App Router. My projects use SSR/ISR, Vercel CI/CD, preview deployments, and server-side API routes to protect third-party keys.

I built a multi-chain DeFi portfolio tracker that aggregates Ethereum, Polygon, and Base wallet holdings, reducing response latency by about 65% through parallel fetching. I also built a real-time Ethereum gas tracker with sub-200ms UI updates and an AI article summarizer that turns web pages into structured summaries using Mozilla Readability and Llama 3.1 on Groq.

I'm the author of an open-source ethers.js v5-to-v6 migration codemod, benchmarked on Uniswap/v3-periphery with 90.3% automated coverage and zero false positives across 154 tests. I design automation to flag ambiguous migrations for human review rather than silently making incorrect changes.

I also write in-depth technical articles on frontend architecture, Web3 tooling, AI integration, and developer tooling, and I’m an active member of the Women in DeFi community.