Fullstack development,
shipped like production,
not like a demo.
I'm Béla Jónás— I design and build complete web products end to end: frontend, backend, and everything that has to work at 2am when nobody's watching. Premade templates for a fast start, custom builds when you need one.
No agencies. No handoffs. Just code that ships.
One developer, the whole stack.
I build websites and web apps from the database up — no handoffs, no lost context between "the frontend guy" and "the backend guy." Just one person who understands how every layer talks to the others, because I wrote all of them.
My name is Béla Jónás, and codingbybj is where I bring that to clients directly: custom builds when a project needs its own shape, and premade templates for people who want something solid, fast, and already tested in production.
What I build
From a landing page that needs to convert to a full internal system that needs to hold up — pick a lane below, or bring something that doesn't fit in one.
Fullstack web apps
Custom frontend and backend built together — React/Next.js on the front, Node.js and a real database underneath. No shortcuts on either side.
Premade templates
Ready-to-launch templates for landing pages, dashboards, and product sites — clean code, responsive by default, easy to hand to any developer later.
Admin & CMS systems
A back office where you actually control your content — manage pages, users, and data without touching code or waiting on a developer.
Blockchain integration
Wallet connections, on-chain data, and smart contract-backed features, built with the same care as any other part of the stack.
Redesigns & rebuilds
Inherited an old site that's slow or hard to maintain? I'll rebuild it on a stack that's easier to grow, without losing what already works.
Ongoing support
New features, bug fixes, and maintenance after launch — a direct line to the person who actually built your site.
Ready-made, not off-the-shelf
Every template is a real, working codebase — not a screenshot. Preview it, customize it, and launch with your own content in days, not months.
Launchpad
A conversion-focused landing page template with pricing, feature grid, and testimonials built in.
get this template
Nimbus
A mobile weather app template — hourly forecasts, live conditions, and a scan-to-get-the-app QR flow built in.
get this template
Chainfront
A dapp-ready template with wallet connect, on-chain data hooks, and a dark, terminal-inspired UI.
get this templateLet's build something
Tell me what you're trying to build and where it stands today. I'll reply with next steps, a rough timeline, and whether a template or a custom build makes more sense.