Setting Up ElevenLabs API: From Zero to Production
Why ElevenLabs is a Game‑Changer for Voice AI If you’ve been dabbling in text‑to‑speech (TTS) or voice cloning, you know the pain points: low‑qualit…
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Installed, but nothing shows": building an install check for a third-party widget
Any product that ships a <script> tag for customers to paste into their site gets the same support ticket: "I installed it, but nothing shows.…
PostgreSQL Constraint Naming Convention: Which Pattern to Use, and How to Find the Names That Drifted
Disclosure: I build Schemity , a desktop ERD tool - this post is from our blog and uses it for the examples. TL;DR: Use the pattern PostgreSQL alrea…
The Overlooked Reason Your RAG Pipeline Keeps Returning Garbage
I spend a lot of time in the AI space -- reading papers, building things, talking to engineers who are actually shipping. And there is a gap between…
The Exact Stack I Use to Build Production AI Agents (No Fluff)
I spend a lot of time in the AI space -- reading papers, building things, talking to engineers who are actually shipping. And there is a gap between…
Building Dashboards with React: A Practical Guide to Reusable Components and Data Visualization
Dashboards are often the first place users go when they want to understand what is happening in an application. Whether you are building an analytic…
Email Verification Logs Need a Privacy Contract
Email verification is usually discussed as a delivery problem: did the message arrive, did the link work, and did the user finish signup? In product…
Why AND(0, ?) is 0: three values, snapshots and memory in a logic simulator
In my last post I planned a feature, and executing it turned up a bug: the simulator could not hold a bit with two gates. The first circuit in every…
My first web project: 95 pages, 49 indexed, 0 visitors. What would you do (for free)?
This is my first web project, so please assume I know nothing. I'm learning in public and I'd love your recommendations. I built a solar savings cal…
Multi-Chain Crypto UX: Making Different Networks Feel Less Complicated
One thing I find interesting about blockchain development is that the user experience can become complicated long before someone makes their first t…
Step Up! My phone told me I can't dance
This is a submission for the Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle What I Built Step Up! is a web app that tells you whether yo…
The seven most common x402 seller mistakes, and how to fix them
An x402 API asks for payment with an HTTP 402 Payment Required answer, and an AI agent pays it per call in stablecoins. That only works when the 402…
Fan-Out Guarantees for Browser Reconnects in Team Presence and Live Polls
Short answer: use a server snapshot plus a monotonic cursor for the team presence sidebar, and use idempotent commands with explicit acknowledgement…
I built a free, open-source platform with 180+ developer tools and 18 technical guides (Built with Astro)
Hey Dev community! I want to share a project I've been building: Th-Tech. It's a comprehensive, free, and open-source platform for developers. Why I…
Create an AI Dubbing Tool for Video Content
Why Build Your Own AI Dubbing Tool? If you’ve ever needed to localize a video, add a narration track, or simply replace a shaky on‑camera voice, doi…
10 Developer Tools That Make Vibe-Coded Apps Less Fragile
Vibe coding gets you to a working demo quickly. The problems arrive after that: a leaked key, a dependency that changed under you, a test that never…
Everything You Need to Know About Generated Infrastructure and Drift
Generated infrastructure is configuration that a tool writes from a higher-level description: a Dockerfile from a service definition, a routing file…
Rocket: The Rust Web Framework Built Around Ergonomics
Most Rust web frameworks ask you to compose routing and middleware explicitly. Rocket asks you to describe what a route expects, and then gets out o…
One Command, 18 Generated Files: Inside TDK CLI's Local Stack
I ran TDK CLI on a scratch project to count what it generates. The answer is 18 files per frontend service , not 17. I checked the count on the CLI…
Save JSON from a cron job or GitHub Action
Save a JSON result from a scheduled job to a stable URL, then read it from a static page or another script. This guide uses jstash JSON Bins for a s…
Building Privacy-First Patient Education Interfaces
Healthcare websites increasingly use interactive forms, educational questionnaires, visual explainers, and decision-support interfaces to make compl…
I let an AI coding agent build a 1,300-page site with a $0 server bill
I'm not a full-time developer. For the past few days I've been running an experiment: I describe what I want in plain Korean, and an AI coding agent…
Why Most Business Calculators Lie to You: The Mathematics of Integer Bounds and Capacity Value
By Engineering Team, JC TechLabs Published for DEV Community, Hashnode & Technical Publications Canonical URL: https://jctechlabs.com/tools/ Sou…
A fast website with a blog, search and a contact form, hosted free
Originally published on the BootForm blog . I work on BootForm, the form backend used in step 4; the templates are free and MIT licensed. In short:…
How to deploy TanStack Start to Cloudflare Workers with D1, R2 and better-auth
TanStack Start runs well on Cloudflare Workers. The official guides get you to "Hello world" quickly. The trouble starts when you add a database, fi…
Streaming LLM-Generated UI in React 19 with OpenUI Lang
Every generative UI demo I have shipped hits the same wall: the model emits a JSON component tree, and nothing paints until the closing brace arrive…
Architecture Patterns for Custom Direct Booking Engines & Hospitality Web Apps
When building web applications for the hospitality sector—ranging from luxury boutique hotels to private villa rentals—developers often face a choic…
Fixing Invalid JSON in Tag Schema: Practical Guide and Syntax Rules
The "invalid JSON in tag schema" error occurs when the code inside a {% schema %} tag violates strict JSON syntax rules, most commonly because of tr…
Invalid JSON Format Examples: Rules, Common Errors, and Syntax Fixes
An invalid JSON format is any text payload that breaches standard JSON structural rules, such as using single quotes, omitting double quotes on keys…
I Built a Pixiv Alternative in Go (and Taught It SEO)
Pixiv is wonderful. It's also, architecturally, a black box you can't learn from. So I built my own illustration community platform — Lumiina — live…