ywc's blog

Why I Moved Away from Direct RPC Calls: Building a High-Performance Indexing Layer with Rindexer

The Story Begins: My Naive Approach When I started building Neon Marketplace, my NFT trading platform, I wanted to ship fast. Like most developers entering Web3, I reached for the familiar tools: Nex

2026-02-05

Backend Engineering > Blockchain

#Blockchain #Web3 #PostgreSQL #Performance Optimization #Rust #Indexer #Backend Engineering

Optimizing an AIoT Data Pipeline: From 20 Seconds to 50 Milliseconds

Building Award-Winning Healthcare Technology During my internship at the Institute for Information Industry (III/資策會), I had the privilege of contributing to the “iMat for Smart Care” project — a 5G

2025-11-15

Backend Engineering

#Backend #Node.js #PostgreSQL #RabbitMQ #Performance Optimization #System Design #Docker #MQTT

Deep Dive into Uniswap V1: The DeFi Foundation of the AMM Era

Introduction: Farewell to the Order Book In the blockchain world, decentralized exchanges (DEXs) have always been a challenge. Most traditional exchanges, whether centralized or not, rely on an “Orde

2025-10-19

DeFi > Blockchain > Smart Contracts

#Solidity #Uniswap #AMM #ERC20 #Liquidity Pool

Building a Decentralized Stablecoin: A Deep Dive into the DeFi Stablecoin Project

Decentralized Finance (DeFi) has opened up a world of possibilities, and at its core lies the need for stability in a volatile market. Stablecoins are the bedrock of this new financial landscape, prov

2025-09-18

Web3 Project

#DeFi #Stablecoin #Solidity #Blockchain #Chainlink #Foundry

Unlocking Deeper Security: An Introduction to Handler-Based Invariant Testing

Unlocking Deeper Security: An Introduction to Handler-Based Invariant Testing In my previous article, we explored the fundamentals of invariant testing, a powerful technique for discovering bugs that

2025-09-17

Web3 Security

#Foundry #Fuzz Testing #Invariant Testing #Smart Contract Security #Web3 #Handler-Based Testing

Fuzzing the Foundations: A Deep Dive into Smart Contract Invariant Testing with Foundry

Beyond Unit Tests: An Introduction to Fuzz & Invariant Testing for Smart Contracts After completing a comprehensive suite of unit tests, many developers feel confident in their project’s security.

2025-09-12

Web3 Security

#Solidity #Foundry #Fuzz Testing #Invariant Testing #Smart Contract Security #Web3

My Bug Bounty Journey

From Bug to Breakthrough: Lessons from My Web3 Security Research Journey As a Web3 developer, my mission is to help build a more resilient decentralized world. I believe that true security goes beyond

2025-09-10

Web3 Security Research

#Bug Bounty #Web3 Security #Lido Dual Governance