Blockchain / FinTech / NFT Platform

Swanex NFT Platform

A private blockchain-based NFT investment platform with investor onboarding, KYC flow, payment gateway integration, smart contracts, admin dashboards, and secure investment workflows.

Role

Full-stack / Blockchain Engineer

Platform

Web (Investor + Admin)

Core Stack

Next.js · Hyperledger Besu

Status

Build and handoff evidence available

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The Problem

NFT investment workflows that needed stronger trust signals

NFT investment platforms are easy to fake and hard to trust — many are thin marketplaces bolted onto a public chain with no serious onboarding or investor workflow. Swanex needed a more controlled product: KYC-style onboarding, payment flow, auditable smart contracts, and an admin layer for managing users, assets, and platform activity — not just a minting UI.

Target Users

Who Swanex is built for

Retail and accredited investors looking to invest in tokenized / NFT-backed assets

Platform administrators managing investor onboarding, compliance, and asset issuance

Asset issuers who need to tokenize and distribute holdings under controlled conditions

My Role

What I owned

Full-stack engineering across the Next.js frontend and Node.js backend

Blockchain engineering — smart contract development and integration with Hyperledger Besu

Building the KYC and investor onboarding flow

Building secure payment and investment workflows, and the admin dashboard

Product Features

What the platform does

Investor onboarding with KYC verification flow

Payment gateway integration for funding investments

Smart contracts implementing ERC-721 and ERC-1155 token standards

Admin dashboard for managing investors, assets, and platform activity

Secure, auditable investment workflows end-to-end

Role-based access via JWT authentication

Tech Stack

Built with

Frontend

Next.js

Backend

Node.jsRedis

Database

PostgreSQL

Blockchain

Hyperledger BesuSolidityERC-721ERC-1155

Auth

JWT

Architecture

How the system is layered

Investor & Admin Web Apps

Next.js frontend for investor onboarding and the admin operations dashboard.

↓

API Layer

Node.js — JWT authentication, KYC orchestration, and business logic, with Redis for session caching.

↓

Database

PostgreSQL — investor records, transactions, and platform metadata.

↓

Smart Contract Layer

Solidity contracts implementing ERC-721 and ERC-1155 token standards.

↓

Private Blockchain

Hyperledger Besu — permissioned settlement and audit layer.

Challenges

What was hard about building this

Challenge

Handling KYC-style checks without killing onboarding conversion

How it was addressed

Designed a streamlined multi-step KYC flow with clear progress and status, so verification felt guided rather than like a wall.

Challenge

Needing institutional trust while keeping smart-contract compatibility

How it was addressed

Hyperledger Besu's EVM-compatibility let the team reuse standard Solidity/ERC tooling while keeping a private, permissioned network.

Challenge

Keeping investment workflows secure end-to-end

How it was addressed

JWT-based auth, Redis session handling, and a strict server-side workflow state machine so no step in payment → KYC → issuance could be skipped or replayed.

The Solution

Controlled infrastructure, investor-grade UX

Swanex combines a familiar investor-facing web experience with a controlled infrastructure layer underneath: KYC-style onboarding, JWT-secured sessions, payment workflow handling, and a permissioned Hyperledger Besu network running ERC-721/1155 smart contracts. Admins get operational visibility without needing to work directly through a blockchain explorer.

Results

Where the project stands

Week Build Cycle

50+

KYC Verifications

Smart Contracts Built

Private

Besu Network

Delivered a working investment-platform build spanning onboarding, payments, smart contracts, and admin operations

Built a KYC-style flow suitable for investor onboarding review, not just a demo screen

Implemented a permissioned blockchain layer using Hyperledger Besu and Solidity contracts

Prepared an admin operations layer alongside the investor-facing product

Lessons Learned

What this taught me

Permissioned chains like Hyperledger Besu can give Web3 products institutional credibility public chains struggle to offer

Compliance flows (KYC) succeed or fail on UX, not just on the legal checklist

Security has to be designed as a workflow — a state machine — not just an authentication layer

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