j
john_kenny7

John

@john_kenny7

FullStack, Blockchain Rust Developer

Nigéria
Inglês, Ioruba
Algumas informações são exibidas no idioma inglês.
Sobre mim
I am a Full-Stack, Blockchain, and Rust Developer building web apps and Web3 projects since 2022. I specialize in smart contracts, NFT marketplaces, and DeFi dashboards, owning projects end-to-end from the API to the frontend. I am proficient in Node.js, TypeScript, and Rust, ensuring high test coverage and clear documentation for every project I deliver.... Saiba mais

Habilidades

j
john_kenny7
John
offline • 
Tempo médio de resposta: 1 hora

Conheça meus serviços

Aplicações Web Full Stack
I will be your full stack rust developer for web apps and software
A partir deUS$ 150 /projetoMais detalhes
Contratos Inteligentes
I will develop audit test solidity smart contracts for your project
A partir deUS$ 120 /projetoMais detalhes

Portfólio

Experiência profissional

Upwork

Freelance Full-Stack & Blockchain Developer

Upwork • Freelance

Dec 2019 - Present • 6 yrs 10 mos

Delivered 15+ client projects including NFT marketplaces, DEXs, and prediction markets. Rewrote ERC-1155 marketplace systems as UUPS-upgradeable contracts with 100% test coverage. Built a binary prediction market on BSC with an on-chain event indexer and Next.js dashboard. Architected sports prediction backends and production-ready auth APIs.

freelance

Rust Software Developer

freelance • Freelance

Jan 2025 - Oct 2026 • 1 yr 9 mos

Rebuilt a Node.js/TypeScript authentication API in Rust using Axum, Tokio, and SQLx. Developed the system test-first with 140+ integration tests. Implemented rate limiting with Redis, bcrypt hashing, and SMTP delivery. Built custom async executors from scratch to master Rust's async internals, including future state machines and wakers.