Aref
XV

Web3 engineer with a builder mindset. I ship contracts and the infrastructure around them. I authored secudigate — an open-source, non-custodial stablecoin payment gateway. Solidity contract with 157 passing tests including an 80-test adversarial suite (reentrancy, malicious / fee-on-transfer / USDT-shaped tokens, price-feed manipulation, ACL bypass, sanctions-oracle attacks, replay protection) and Foundry stateful invariants asserting custody-zero across 128,000 randomized operations. Live demo at secudigate.com, source at github.com/secuditylabs/secudigate. MIT. Currently lead developer at Kaaj Invest, where I built and operate 3 production products solo — a multi-chain USDT buy/sell platform with on-platform KYC, a precious-metals marketplace with analytics dashboards, and a platform CRM. FastAPI backend, React frontend, Nginx + systemd infra I deploy and maintain end-to-end.

https://www.linkedin.com/in/aref-mirnejad-0bb593338?utm_source=share_via&utm_content=profile&utm_medium=member_ios

https://x.com/xvishere

https://github.com/arefxv

Work experience

Kaaj Invest

October 2025 – Current time

Job title

Lead Developer

Work experience & achievements

- Tetherisho(tetherisho.com) — multi-chain USDT buy/sell platform with KYC and order management. Integrated USDT across EVM-compatible chains, Solana, and Tron — three independent RPC + signing stacks behind one product surface. FastAPI backend (JWT auth, KYC pipeline, order book, live price feed); React + Vite frontend with Three.js / R3F 3D scene and face-api.js KYC face verification. - Zarinkaaj (zarinkaaj.com) — precious-metals marketplace with analytics dashboards (Recharts), image processing pipeline (Pillow + aiofiles), and Excel-export reporting (openpyxl). React + Vite + Tailwind frontend with Zustand and TanStack Query. - Kaaj Invest (kaajinvest.com) — platform marketing site + internal users CRM. React 19 + Vite + Framer Motion + Three.js. - Own production infrastructure end-to-end: Nginx reverse proxy, Let's Encrypt SSL, per-app systemd services, isolated databases, SSH/key hardening, deployment runbooks.

Arka Coin

September 2024 – January 2026

Job title

Product Manager

Work experience & achievements

Crypto investment & fundraising platform (arkacoin.com). Owned product roadmap and feature specs.

Open Source & Self-Directed

May 2023 – Current time

Job title

Independent Web3 Engineer

Work experience & achievements

Built and maintain **30+ public Solidity repositories** spanning DeFi, ERC-4337 account abstraction, NFTs, Merkle airdrops, on-chain governance, and stablecoin protocols.

Education

Not specified

ArefXV

Work experience

Education

Aref
XV