I Wanted Real-Time Stock Charts on My Garmin Watch. Monkey C Had Other Plans.
I Wanted Real-Time Stock Charts on My Garmin Watch. Monkey C Had Other Plans. I wanted stock prices on my wrist. Not a notification — an actual chart.…
Testing & QA
⚑ Report a ProblemLatest Testing & QA news from Tech News
All topics
agents
ai
api
architecture
automation
aws
backend
beginners
career
claude
cybersecurity
database
devchallenge
devops
javascript
llm
machinelearning
mcp
opensource
performance
productivity
programming
python
security
showdev
softwareengineering
testing
tutorial
typescript
webdev
Stop Trading Like It's 1999 — I Built an Autonomous, Vision-Capable Crypto Bot with Python 3.13
Let me tell you a story about failure. December 2024. I'm sitting in my Wrocław apartment after an 8-hour warehouse shift. My back hurts. I've been tr…
Three Sui Exploits, One Disease — Why "The Math Looked Fine" Keeps Costing Hundreds of Millions
Cetus lost $223M to a shift overflow. Aftermath lost $1.14M to a negative fee. Bucket Protocol ships a decimal scaling bug today. All three passed aud…
How to Contribute to an Open-Source AI Trading Bot
How to Contribute to an Open-Source AI Trading Bot If you want to contribute to an open-source AI trading bot — and build on a real, running system in…
How to Deploy an AI Crypto Trading Bot on Your VPS
How to Deploy an AI Crypto Trading Bot on Your VPS In this tutorial you’ll deploy an AI crypto trading bot to your own VPS — the open-source Claude-po…
I built a machine-payable API for AI agents and made $0.00 from strangers. Here's every number.
Over a few weeks I built and shipped a small x402 service on Base: token-risk.com , a pay-per-call API that returns deterministic structural risk repo…
Build a Crypto Payment Module for SaaS Apps
Most SaaS products do not need a “crypto payment button.” They need a payment module. That distinction matters. A button can redirect a customer to a …
Build a Vertical Crypto Checkout for a Specific Niche
Build a Vertical Crypto Checkout for a Specific Niche Most developers treat checkout as a generic feature. A customer selects a product. The backend c…
Why Agent Payment Security Is an Architecture Problem, Not a Monitoring Problem
This week, the AI agent economy got its first real security wake-up call. Researchers confirmed what many feared: AI agents are being successfully com…
Slates for CryptoNote: Bringing MimbleWimble's Offline Pattern to Monero-Forks
Privacy-preserving cryptocurrencies have been shaped by two foundational but philosophically distinct approaches. On one side sits MimbleWimble — prop…
Build a Real-Time Crypto Trading Dashboard with Python, WebSockets, and React
Build a Real-Time Crypto Trading Dashboard with Python, WebSockets, and React Real-time data is the difference between catching a move and reading abo…
Wealtii -> How I Built a 315,000 Line Fintech Platform Solo in 10 Months
Hey DEV community! This is my first time posting here. Over the last 10 months , I have been locked in my room building a fully automated digital asse…
My trading bot said it was trading for four days... he was lying
Twenty-five days on Hyperliquid. Sixty-five closed trades. P&L: -$9.21. Turns out that was the smallest wrong thing about it. The landing page sho…
Building a Stock Market Trading Bot in Python: My Neo Moment
The Quest Begins (The "Why") Honestly, I was tired of watching my portfolio fluctuate while I stared at candlestick charts like they were hieroglyphic…
Backtesting Trading Strategies: From Theory to Execution – My Quest for the Holy Grail of Profit
The Quest Begins (The "Why") Picture this: I’m sitting at my desk, coffee gone cold, staring at a spreadsheet that looks like something out of Indiana…
📈 The Jedi’s Guide to Building a Python Stock‑Market Trading Bot
(or: How I Turned My Laptop Into a Lightsaber for the Market) The Quest Begins (The “Why”) Ever stared at a blinking cursor at 2 a.m., wishing you cou…
The Fee Assumption Quietly Wrong in Most Backtests
If you've written a crypto backtester, there's a decent chance one line in it is quietly wrong. It's not the slippage model, not the funding rate, not…
Why I Stopped Ignoring Position Size (and What It Taught Me About Stops)
Why I Stopped Ignoring Position Size (and What It Taught Me About Stops) Quick context (why you're writing this) Here's the thing: I spent a whole wee…
The "AI Quant Bot" Mirage: Inside the Polymarket Copytrade Scam Network Flooding Crypto Twitter
An investigation into a coordinated cluster of verified X accounts manufacturing fake trading "success stories" to funnel victims into Telegram draine…
What I learned scraping 141 crypto cardholder agreements
On 3 February 2026, three unrelated crypto cards — CEX.IO Card, Trustee Plus, and IN1 — stopped processing payments on the same day. They had no paren…
Keccak256 From Scratch in 200 Lines of Kotlin (Because Web3j Was 8 MB)
Web3j is 8 MB. My APK is 4.5 MB. So I wrote the Ethereum hash function from scratch. Why Not Just Import Web3j? I was building a native Ethereum walle…
The Definitive Guide to Web3 Wallet Segmentation and Analytics
Key Takeaways Wallet segmentation groups addresses by type and behavior: hot wallets for real-time engagement signals, cold wallets for high-value hol…
Building an Interactive Merkle Tree Visualizer — One Byte Changes, the Whole Root Changes, in O(log n) Hops
"If a Merkle tree commits to a million transactions and one of them is altered, the root changes. To prove inclusion of any one transaction, you only …
Best Product Analytics Tools for DeFi Teams
Key Takeaways DeFi product analytics requires onchain and offchain data integration because the blockchain records smart contract interactions that tr…