I'm a Solidity developer focused on writing secure, well-tested smart contracts for DeFi and DApp projects. Currently deepening my skills in contract security, testing patterns, and DApp development.

• Smart Contracts — ERC-20 tokens, staking protocols, access-controlled systems
• Security-First Code — ReentrancyGuard, Checks-Effects-Interactions, OpenZeppelin standards
• DApps — On-chain logic connected to frontend interfaces

A smart contract bank with full security implementation.

What it does:

• Users deposit and withdraw ETH
• Owner-only bank balance visibility
• Protected against reentrancy attacks

Security used:

• ✅ ReentrancyGuard from OpenZeppelin
• ✅ Checks-Effects-Interactions pattern
• ✅ Ownable access control
• ✅ private balance mapping

Deployed & tested on Sepolia Testnet

A fully functional ERC-20 token deployed on Ethereum Sepolia Testnet.

What it does:

• Standard ERC-20 token compatible with MetaMask & all wallets
• Fixed supply of 1,000,000 KRK
• Owner-controlled minting

Built with:

• ✅ OpenZeppelin ERC-20 standard
• ✅ Ownable for admin control
• ✅ Live contract on Sepolia: 0xF95a8A5ba4eDf4356bC373f272b71F2AfB1bC8A4

Importable directly into MetaMask on Sepolia network

• Hardhat — local testing & deployment
• Foundry — advanced contract testing
• ethers.js — connecting contracts to frontend
• ERC-20 token standard ← done with Kareka Token!
• ERC-721 NFT standard
• DeFi patterns: staking, liquidity pools

• Remote Junior Smart Contract Developer roles
• Freelance Solidity work
• Bounty contributions (Gitcoin, Immunefi)
• Open source collaboration

📍 Based in Semarang, Indonesia — available globally, async-friendly

• GitHub: @Moebium
• Open to work: Yes

"Every line of code that holds real money must be written like someone is trying to break it."