Translating a product catalog with an LLM: cache keys and guard rails
The first version of an LLM catalog translation pipeline usually works and is still wrong. It re-translates fields nobody touched, and it happily publ…
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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…
Building a Bounty Agent for Verdikta on Base L2 published
Building an Autonomous Agent for Verdikta Bounties: A Technical Deep Dive How I built a Python agent that monitors, evaluates, and interacts with Verd…
Build a Cross-Border Crypto Payment Stack for Digital Sellers
Most developers think about cross-border payments as a checkout problem. A buyer is in one country. A seller is in another country. The seller wants t…
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 …
I Built a Garmin Watch Face with Live Stock Charts in Monkey C — Here’s What I Learned
I wanted stock prices on my wrist. Not a notification — an actual chart. So I built a custom Garmin watch face with live sparkline charts for 5 config…
I Compared 6 Ways to Legally Pay Dev Contractors in Russia, Belarus, and the CIS in 2026
I pay dev contractors across a dozen-plus countries, and the one rail that works everywhere else — a plain international wire — reliably breaks for an…
Bypassing AMM Slippage: How Typelex Uses On-Chain Atomic Swaps for MEV-Proof OTC Trading
If you’ve ever built or interacted with DeFi protocols, you know the mathematical limitations of Constant Product Market Makers ($x \times y = k$). Wh…
Build a Crypto Payment Reconciliation Tool for Merchants
Most developers think about crypto payments as a checkout problem. Create an invoice. Show a payment link. Wait for a callback. Mark the order as paid…
Build a Telegram Paid Access System with Crypto Payments
Telegram is full of communities that already sell access informally. Some sell private trading groups. Some sell language classes. Some sell paid news…
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…
Capturing, Streaming, Storing, and Visualizing Crypto Market Data in Real Time with PostgreSQL, Debezium, Kafka, JDBC & Grafana
In the fast-moving world of cryptocurrency, market data changes every second — prices fluctuate, trades execute, and volumes shift continuously. Captu…
Ophis: an intent-based DEX aggregator for humans and AI agents
Most on-chain swap flows still ask you to think like a router: pick a pool, choose a route, set a slippage number, and hope a bot does not sandwich yo…
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…
The Giants Are Here (And They Brought the Wrong Tools)
Mastercard launched agent-to-agent payments this week. Circle's co-founder raised $30M for Catena Labs and is filing for a national bank charter. Meta…
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…
The Botfather: Building Your First Crypto Trading Bot
The Quest Begins (The "Why") Honestly, I was tired of staring at charts at 2 a.m., trying to catch that perfect entry while my coffee went cold. I’d s…
The AI Agent Payment Wars Have Begun — Here's What Actually Matters
Visa announced this week that AI agents can now use credit cards. Mastercard launched a protocol for AI-to-AI payments and micropayments. Catena Labs …
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…
We automated the easy half of trading and called it a trader
Here's the part everyone keeps skipping. The AI-agent trading boom is not a scam, and it is not vaporware. There are agents in production right now si…
Keep the Credit Ledger Off-Chain. Checkpoint It On-Chain.
I specced an on-chain credit ledger for a compute network, wrote the mint, and then the token program refused to initialize it. The two extensions I n…
What it takes to run a Polymarket Up/Down arbitrage bot in production
A "risk-free" arbitrage on Polymarket's crypto Up/Down markets is easy to describe and hard to actually run. The edge — the cross-cycle sandwich — is …
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…
Web3 Onboarding Is Not a Wallet Problem. It Is a Trust Problem.
Most Web3 onboarding advice starts in the same place: Make wallet connection easier. That is useful, but incomplete. Wallet connection is only the fir…
I Built a Pay-Per-Call Crypto Signal API with x402 — Heres the Architecture
I Built a Pay-Per-Call Crypto Signal API with x402 — Here's the Architecture TL;DR: I shipped a live crypto signal API where every call costs $0.01 in…
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…