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Solidity smart contracts, Web3 development, DeFi protocols, NFTs, EVM chains, Hardhat/Foundry tooling, and blockchain security. Use when writing smart contracts, building dApps, auditing contract security, or integrating Web3 wallets.
Baseado na classificação ocupacional SOC
AR/VR/XR development with Unity XR, WebXR, ARKit, ARCore, Meta Quest SDK, and spatial computing. Use when building augmented reality, virtual reality, mixed reality applications, or spatial experiences.
SOC2, HIPAA, GDPR, PCI-DSS, FedRAMP compliance implementation in code. Audit logging, data encryption, access controls, privacy by design, and regulatory requirement mapping. Use when implementing compliance controls, preparing for audits, or building privacy-compliant systems.
ETL/ELT pipelines, data warehousing (BigQuery, Snowflake, Redshift), stream processing (Kafka, Spark Streaming), orchestration (Airflow, Dagster, Prefect), dbt transformations, and data lake architecture. Use when building data pipelines, designing warehouse schemas, or implementing real-time data processing.
Developer experience (DX) engineering, SDK design patterns, API ergonomics, CLI tooling design, documentation-driven development, and developer onboarding. Use when designing SDKs, improving API ergonomics, building developer tools, or creating developer documentation.
Edge computing with Cloudflare Workers, Deno Deploy, Bun, Vercel Edge Functions, AWS Lambda@Edge, and edge databases (Turso, D1, DynamoDB Global Tables). Use when building low-latency edge applications, edge-side rendering, or globally distributed compute.
Embedded systems firmware, microcontrollers (ESP32, STM32, Arduino, Raspberry Pi), RTOS (FreeRTOS, Zephyr), IoT protocols (MQTT, CoAP, BLE), bare-metal C/C++, and hardware peripheral interfaces (I2C, SPI, UART, GPIO). Use when developing firmware, working with microcontrollers, or building IoT devices.
| name | blockchain-web3 |
| description | Solidity smart contracts, Web3 development, DeFi protocols, NFTs, EVM chains, Hardhat/Foundry tooling, and blockchain security. Use when writing smart contracts, building dApps, auditing contract security, or integrating Web3 wallets. |
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract MyToken is ERC20, Ownable {
constructor() ERC20("MyToken", "MTK") Ownable(msg.sender) {
_mint(msg.sender, 1000000 * 10 ** decimals());
}
}
ReentrancyGuard or nonReentrantOwnable, AccessControl, or custom modifiers| Vulnerability | Prevention |
|---|---|
| Reentrancy | nonReentrant modifier, CEI pattern |
| Front-running | Commit-reveal schemes, flashbot protection |
| Oracle manipulation | Use Chainlink, TWAP over spot prices |
| Unchecked return values | Always check transfer() return or use safeTransfer |
| Delegatecall injection | Never delegatecall to user-supplied addresses |
npx hardhat init
npx hardhat compile
npx hardhat test
npx hardhat deploy --network sepolia
forge init
forge build
forge test -vvv
forge script script/Deploy.s.sol --rpc-url $RPC --broadcast
// viem (recommended for new projects)
import { createPublicClient, http } from 'viem'
import { mainnet } from 'viem/chains'
const client = createPublicClient({ chain: mainnet, transport: http() })
const balance = await client.getBalance({ address: '0x...' })
// wagmi hooks (React)
import { useAccount, useBalance, useContractWrite } from 'wagmi'
const { address } = useAccount()
const { data: balance } = useBalance({ address })
rewardPerToken accumulator patterncalldata over memory for read-only paramsunchecked blocks for safe arithmetic