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Open Source
Fullstack, AI, Backend & Smart Contract Engineer

Building Solutions.
Shipping tools, docs, and dApps.

Smart contracts, backend systems, and AI—shipped fast and clean.

DevRelSui on Campus
Open SourceContributor
A. J. George (BlockchainBard)

A. J. George

BlockchainBard

Fullstack Engineer • DevRel

Fullstack
Backend
Infrastructure
Security
Blockchain
AI Agents
DevRel
Open Source

Portfolio

Featured Projects

Some of my recent work across blockchain, AI, and backend systems

Payfrica Identity & Payments
Featured

Payfrica Identity & Payments

All-in-one digital asset toolkit built for Africa

Making digital assets simple, safe, and usable for Africans. Features peer-to-peer trading, instant payments, and 'Payfrica Bridge Lite' for seamless conversion between digital assets and local bank accounts.

Sui
FinTech
Identity
Sui Move Runner
Featured

Sui Move Runner

One-Click Deploy & Interact with Move Smart Contracts on Sui

A comprehensive VS Code extension that streamlines Sui Move development with an intuitive sidebar interface, automated CLI management, and cross-platform compatibility. Features include one-click package creation, smart build system, integrated testing, wallet management, and network switching.

Sui
VS Code Extension
Move
Sui String Formatter
Featured

Sui String Formatter

Lightweight string formatting utility for Sui Move

A lightweight string formatting module for the Sui Move language, supporting both template-based formatting (like `{}` placeholders) and builder-style formatting using a `Formatter` struct. Bridges the gap left by native string formatting utilities in Sui Move.

Sui
Move
Library
Monban — Move Access Control Library
Featured

Monban — Move Access Control Library

Registry-based access control system for Sui Move packages

Monban (門番 — Japanese for "gatekeeper") is a comprehensive, registry-based access control library for Sui Move. It solves the composability gap left by public, public(package), and public(friend) by letting you whitelist external packages at runtime via a dynamic AccessRegistry shared object. Callers prove their identity with a Witness derived from their own module types, enabling secure inter-package calls without hardcoding addresses or circular friend declarations. Published on Move Registry (MVR) for easy installation.

Sui
Move
Library

Lending & Borrowing App on Sui

DeFi lending and borrowing protocol built on Sui

A decentralized lending and borrowing application on the Sui blockchain, enabling users to lend their assets and earn interest, or borrow against their collateral. Built with Move smart contracts for secure and efficient DeFi operations.

Sui
DeFi
Lending

Decentralized Voting Application on Sui

A decentralized voting system built on the Sui blockchain

A decentralized voting system built on the Sui blockchain, enabling secure, transparent, and tamper-proof elections. Built with Move smart contracts and a React frontend for seamless user experience.

Sui
DeFi
Voting

Handwritten Digit Recognition System

Deep learning-based system for recognizing handwritten digits using CNN

A deep learning-based system for recognizing handwritten digits using a Convolutional Neural Network (CNN). The system processes images in real-time and accurately classifies handwritten digits.

AI/ML
Deep Learning
Computer Vision

Movie Recommendation System

Machine learning model for personalized movie recommendations

A machine learning model that recommends movies based on user preferences and viewing history. Implements both collaborative filtering and content-based recommendation approaches.

AI/ML
Machine Learning
Recommendation System
Voultron Games Infrastructure
Featured

Voultron Games Infrastructure

Provably fair gaming smart contracts and revenue sharing systems

Specialized smart contract infrastructure for the Voultron ecosystem. Engineered high-performance gaming logic on Sui using Move, featuring provably fair outcomes via Sui VRF and a decentralized revenue-sharing architecture.

Sui
Move
Smart Contracts
Payfrica Identity & Payments
Featured

Payfrica Identity & Payments

All-in-one digital asset toolkit built for Africa

Making digital assets simple, safe, and usable for Africans. Features peer-to-peer trading, instant payments, and 'Payfrica Bridge Lite' for seamless conversion between digital assets and local bank accounts.

Sui
FinTech
Identity
Sui Move Runner
Featured

Sui Move Runner

One-Click Deploy & Interact with Move Smart Contracts on Sui

A comprehensive VS Code extension that streamlines Sui Move development with an intuitive sidebar interface, automated CLI management, and cross-platform compatibility. Features include one-click package creation, smart build system, integrated testing, wallet management, and network switching.

Sui
VS Code Extension
Move
Sui String Formatter
Featured

Sui String Formatter

Lightweight string formatting utility for Sui Move

A lightweight string formatting module for the Sui Move language, supporting both template-based formatting (like `{}` placeholders) and builder-style formatting using a `Formatter` struct. Bridges the gap left by native string formatting utilities in Sui Move.

Sui
Move
Library
Monban — Move Access Control Library
Featured

Monban — Move Access Control Library

Registry-based access control system for Sui Move packages

Monban (門番 — Japanese for "gatekeeper") is a comprehensive, registry-based access control library for Sui Move. It solves the composability gap left by public, public(package), and public(friend) by letting you whitelist external packages at runtime via a dynamic AccessRegistry shared object. Callers prove their identity with a Witness derived from their own module types, enabling secure inter-package calls without hardcoding addresses or circular friend declarations. Published on Move Registry (MVR) for easy installation.

Sui
Move
Library

Lending & Borrowing App on Sui

DeFi lending and borrowing protocol built on Sui

A decentralized lending and borrowing application on the Sui blockchain, enabling users to lend their assets and earn interest, or borrow against their collateral. Built with Move smart contracts for secure and efficient DeFi operations.

Sui
DeFi
Lending

Decentralized Voting Application on Sui

A decentralized voting system built on the Sui blockchain

A decentralized voting system built on the Sui blockchain, enabling secure, transparent, and tamper-proof elections. Built with Move smart contracts and a React frontend for seamless user experience.

Sui
DeFi
Voting

Handwritten Digit Recognition System

Deep learning-based system for recognizing handwritten digits using CNN

A deep learning-based system for recognizing handwritten digits using a Convolutional Neural Network (CNN). The system processes images in real-time and accurately classifies handwritten digits.

AI/ML
Deep Learning
Computer Vision

Movie Recommendation System

Machine learning model for personalized movie recommendations

A machine learning model that recommends movies based on user preferences and viewing history. Implements both collaborative filtering and content-based recommendation approaches.

AI/ML
Machine Learning
Recommendation System
Voultron Games Infrastructure
Featured

Voultron Games Infrastructure

Provably fair gaming smart contracts and revenue sharing systems

Specialized smart contract infrastructure for the Voultron ecosystem. Engineered high-performance gaming logic on Sui using Move, featuring provably fair outcomes via Sui VRF and a decentralized revenue-sharing architecture.

Sui
Move
Smart Contracts

What I'm Doing Now

Current roles and focus areas

Open Source Contributor

Current

Sui Network Ecosystem

Active contributor to the Sui Network ecosystem, building tools, documentation, and engineering resources for the community.

Skills Overview

Blockchain

3 Technologies

Sui SDK (Mysten)
Smart Contracts
dApps

AI Agents

10 Technologies

TensorFlow
PyTorch
OpenCV
MediaPipe
scikit-learn
NLTK
LangChain
Seaborn
Matplotlib
Pandas

Programming Languages

7 Technologies

Python
C++
TypeScript
JavaScript
Move
Rust
Solidity

Backend

6 Technologies

Flask
FastAPI
Uvicorn
Node.js
NestJS
Express

Workshops & Speaking

Sharing knowledge and onboarding the next generation of engineers.

Sui Nigeria Developers Workshop - Image 1
Oct 2025
Introduction to Sui & Move

Sui Nigeria Developers Workshop

A comprehensive developer workshop covering the fundamentals of the Sui blockchain and the Move programming language for the engineering community in Minna.

Minna, Niger State, Nigeria
Sui Kwara Developers Workshop - Image 1
Nov 2025
Sui Object Model & NFT Creation

Sui Kwara Developers Workshop

An advanced Sui workshop where we dove deep into the Sui object model and created custom NFT collections on-chain with the engineering community in Ilorin.

Ilorin, Kwara State, Nigeria
Sui Bauchi Developers Workshop - Image 1
Aug 2025
Introduction to Sui & Move

Sui Bauchi Developers Workshop

A developer workshop held in Bauchi, introducing local engineers to the Sui ecosystem and the fundamentals of Move programming with hands-on labs.

Bauchi, Nigeria

Hackathons & Competitions

Pushing the boundaries of rapid prototyping and cross-ecosystem engineering.

Sui on Campus Bounty Challenge
1st Place ($1k)

EduXverse: Gamified Learning

Developed EduXverse, a 3D gamified learning platform built on Sui. Integrated Move smart contracts to reward student progress and engagement within a decentralized educational ecosystem.

Sui
Move
Gaming
EdTech
3D
2024
FUT Minna, Nigeria
Sui on Campus Hackafest
1st Place ($3k)

Payfrica: Financial Inclusion

Built Payfrica, an all-in-one digital asset toolkit for Africa, winning the top spot at the Lagos Hackafest. Focused on cross-border payments and mobile accessibility using Sui.

Sui
Blockchain
Fintech
Next.js
2024
Lagos, Nigeria

Blog

Latest Writing

Thoughts on blockchain, DeFi, and technology development

Understanding encryption, hashing, digital signatures, and modern cybersecurity threats in today’s digital world. Digital trust is the bedrock of modern technology, forming an invisible web that secures every online interaction.

Cryptography
Security

Most backend authentication systems fail not because JWTs are bad, but because refresh tokens are misunderstood and poorly implemented. Learn how to implement refresh token rotation correctly.

Backend
Cyber Security Awareness

Onboarding users into blockchain applications has always required a tradeoff between security and usability. zkLogin changes that dynamic by allowing users to sign blockchain transactions using existing Web2 identities.

Cryptocurrency
Cryptography

Tutorials

Latest Videos

Tutorials and deep dives on blockchain and smart contract development

Contact

Let's Work Together

Need a blockchain engineer, AI engineer, or backend specialist? Let's talk.

Get In Touch

Need a blockchain engineer, AI engineer, or backend specialist? Let's talk.