Integrated Blockchain for Policy-Aware Health Data Exchange

A permissioned national health infrastructure for trustworthy records, accountable service delivery, and privacy-aware research collaboration

Client: Industry–Academia Collaboration (National Scope)

IEEE Access–published and Research Council of Norway–funded research on an integrated, policy-aware blockchain for secure health data exchange ( DOI: 10.1109/ACCESS.2023.3279724 ). This industry–academia collaboration combined Brain Station 23 PLC’s engineering expertise, AIUB’s academic and Bangladesh healthcare research, and the University of Stavanger’s international research contribution under the 5G-MODaNeI project. As first author, I helped design and evaluate a Hyperledger Fabric prototype featuring verified identities, policy-controlled access, auditable consent, and tamper-evident health records. 🇺🇳 🇪🇺 Global Research Scope: The architecture supports UN SDGs 3, 9, 16, and 17 through connected healthcare, resilient digital infrastructure, accountable data governance, and international research partnership. Its permissioned identity, access-control, integrity, and audit mechanisms provide a foundation for GDPR-aligned EU and HIPAA-aligned US pilot projects, subject to jurisdiction-specific privacy assessment, interoperability, and clinical validation.

Tech: Hyperledger Fabric 2.1, Distributed Ledger Technology, JavaScript, Node.js, Express.js, Fabric JavaScript SDK, Fabric CA and MSP, Smart Contracts / Chaincode, Raft Consensus, CouchDB, Docker, Flutter, C#, Cloudflare, Apache JMeter

https://ariful-islam.pages.dev/projects/dlt-integrated-healthcare-solution-bangladesh

FinCube

Decentralized Traceability & Stablecoin Settlement Layer

Client: A SaaS for Traders, Export-Import House of UK

FinCube empowers enterprise-grade financial institutions, global e- commerce ecosystems, traders, and export-import houses that want to hold their corporate treasuries in form of stablecoins to move money faster and in real-time. It ensures strict adherence to internal and governmental audit standards, without adding operational complexity or compromising trust.

Tech: Solidity, OpenTelemetry, Prometheus, Grafana, Smart Contracts, Stablecoins, ERP Integration, AML Compliance

https://ariful-islam.pages.dev/projects/cross-border-stablecoin-settlement

RAG-based Crypto Fraud Detection

AI-Driven Fraud Detection Module for FinCube

Client: FinCube Supporting Module

This is a supporting module of FinCube designed for fraud detection in Ethereum transactions. The system integrates AI-driven modules for eKYC, fraud detection, and anomaly scoring, enhancing real-time STP (Straight-Through Processing) rates for high-volume trade and escrow flows. The module leverages RAG (Retrieval-Augmented Generation) technology combined with vector databases and machine learning to detect fraudulent activities in real-time, providing comprehensive fraud analysis for cryptocurrency transactions. The fraud data is integrated with Kaggle API, enabling access to comprehensive datasets for training and validation.

Tech: Python, LangChain, Gemini AI, OpenSearch, Alchemy RPC, The Graph, K-NN, RAG, Vector Database, Feature Engineering

https://ariful-islam.pages.dev/projects/rag-crypto-fraud-detection-ethereum

Workforce Management

Real-Time Rota & Shift Compliance Engine

Client: TTL

A real-time compliance validation engine for shift assignments, integrating UK Working Time Regulations (WTR) and Visa/Work Permit Rules. The system automates compliance checks, reducing manual administrative work by 100% and saving approximately 15-20 administrative hours per week per care home. Built using Chain of Responsibility Design Pattern with stateless, reusable compliance rule objects that execute in sub-millisecond timeframes. Features a multi-severity compliance framework (BLOCK/WARN/PASS) with 12+ rule implementations, enabling proactive compliance management and reducing post-assignment corrections by ~85%. The system includes cursor-based pagination for aggregated reporting, reducing database load by 95% for large datasets, and implements RFC 5545/iCalendar shift rostering for cross-platform scheduling interoperability.

https://ariful-islam.pages.dev/projects/workforce-management-rota-compliance

Hoteler✱✱m

NFT Marketplace for Hotel Reservation & Reselling

Client: InterCo✱✱✱✱✱✱✱tal

Hotelereum is a Web3-based Online Travel Agency (OTA) that transforms hotel reservations into NFT-backed digital assets — making them resellable, traceable, and interoperable across platforms. Beyond bookings, Hotelereum operates as a global messaging and coordination system for the tourism and hospitality supply chain. Each smart contract acts as a single source of truth, securely transmitting token-based reservation data between hotels, OTAs, guests, and third-party service providers. #Web3Travel #NFTMarketplace #BlockchainHospitality #DeFiTravel #TokenizedReservations #SmartContracts #Chainlink #Solidity #DecentralizedBooking 🕵 Smart Contract Audit: 📍 Rekt Test, 📍 Tincho Method, 📍 Cyfrin Standard

Tech: Solidity, Polygon_PoS, NestJs, NextJs, Rainbow_Kit, PostgreSQL, Auth0, Chinlink_Oracle, The_Graph, Waffle_Chai, Solidity Metrics (IDE Extension), Slither, Aderyn

https://ariful-islam.pages.dev/projects/hotel-booking-nft-marketplace

American Football NFT Fan Engagement

A production NFT marketplace for verifiable sports collectibles, physical rewards, and low-friction blockchain adoption

Client: NuArca Labs

HK Sevens is a production Web3 sports fan-engagement platform launched for the 2022 Cathay Pacific/HSBC Hong Kong Sevens . It enabled fans to collect and trade team-card and mascot NFTs, participate in stadium QR experiences, and bid for digital collectibles linked to match-used jerseys and a game ball ( public launch ). Built with Angular, Node.js, Solidity, and Microsoft Azure, the platform combined credit-card onboarding with blockchain ownership, auctions, trading, and physical-item redemption. Its engineering addressed research-relevant problems including concurrent ownership consistency, transaction recovery, EIP-1559 fee management, and hiding blockchain complexity from mainstream users. Verified Smart Contract: View HK7S ERC-721 contract on Polygon Blockscout NFT Collection: Explore Hong Kong Sevens Digital Collectibles on OpenSea

Tech: Angular, Node.js, Solidity, Microsoft Azure, EVM Smart Contracts, NFT Infrastructure, EIP-1559, Web3 Wallets, Multi-Chain Architecture

https://ariful-islam.pages.dev/projects/hk-sevens-scalable-web3-fan-engagement

Fischerm✱✱y

Decentralized Multi-Tenant E-Commerce with Internet Identity Integration Overview

Client: SEI✱✱OS LLC.

This project pioneers fully on-chain e-commerce on the DFINITY Internet Computer (ICP) network — where both frontend and backend live natively on-chain. Designed as a multi-tenant decentralized marketplace, it empowers multiple vendors to host isolated online stores, each running in its own dedicated canister backend for fault isolation and scalability. Integrated with Internet Identity (II), users can securely log in without usernames or passwords, enjoying a single sign-on (SSO) experience across all participating vendor stores. The result: a first-of-its-kind, self-scaling blockchain e-commerce ecosystem, blending decentralization, security, and real-world retail readiness. #Web3Ecommerce #InternetComputer #ICPBlockchain #MultiTenantArchitecture #InternetIdentity #DecentralizedCommerce #BlockchainRetail #OnChainStore

https://ariful-islam.pages.dev/projects/icp-blockchain-ecommerce

Hvem er jeg? | Who Am I?

Digital Marking, Device Tracking Application

Client: Sykehusp✱✱✱✱er

It is a web application used by hospitals to mark & track their duty communication devices . This application is responsible for registering communication devices through their IMEI numbers, map those devices with hospital staff and manage devices with the help of MDM.

https://ariful-islam.pages.dev/projects/device-tracker

Customs Import Entitlement

Customs Bond Commissionerate (CBC), a government agency of People's Republic of Bangladesh

Client: Bangladesh Customs

The consumer section is available as a mobile application for basic queries by product HS-Code, while major import entitlement operations and administrative actions are handled through a web application. The mobile app is available on Google Play. In the web application, importers can apply to import raw materials in specific quantities for manufacturing and exporting goods as finished products to receive special tax considerations from the government. Customs officers can quickly review, verify, process, and track import entitlement applications, ensuring a transparent auditing process.

https://ariful-islam.pages.dev/projects/customs-house-gov-project