Rony CozziFull stack developer · UX/UI designer

Open to work

01Intro0:20

Portfolio · 2026

Rony Cozzi

Full stack developer · UX/UI designer

I design the interface and code it myself, from the first sketch to launch: websites and web products with bookings, catalogs, forms and admin panels. I'm looking to join a team, and I take on projects too.

Córdoba, Argentina · UTC-3 · Remote

See projectsLet's talk
Rony Cozzi, full stack developer and UX/UI designer. A portfolio you move through like a DJ set.

02Selector0:42

From the screen to the database

I design the interface and code it, set up the data and the APIs, and test it before it goes live. For a team, that's someone who understands both design and code. For a business, it's one person in charge of the whole site.

  1. CH 1

    UX/UI design

    • Information architecture
    • Flows and screens
    • Design systems with tokens
    • Typography and color
    • Responsive and mobile first
    • Accessibility (WCAG AA)
    • Microinteractions and motion
    • Canva

  2. CH 2

    Frontend

    • HTML5
    • CSS3
    • JavaScript
    • TypeScript
    • React
    • Next.js
    • Tailwind CSS

  3. CH 3

    Backend

    • Node.js
    • REST APIs
    • PostgreSQL
    • Prisma
    • SQL
    • Validation with Zod
    • Login and users

  4. CH 4

    Delivery

    • Git and GitHub
    • GitHub Actions
    • Vercel
    • Docker
    • Testing with Vitest and Playwright
    • SEO and page speed
    • AI tools, as support

This site is my work too: I designed and coded it with Next.js, TypeScript, GSAP, Lenis and three.js. I generated the 3D turntable with AI tools as support.

03Drop5:13

What I've designed and built

Six live sites you can open and try, plus the private panel we run JAC Studio on. The demos are built for specific industries: real estate, architecture, beauty, law and software. Each record shows what I designed and what I built.

Keep scrolling to flip through the records. Open a sleeve to see the details.

04Breakdown1:09

How I got here

Before coding, I worked in sales, in a factory and on modeling campaigns, and I've been DJing at events for more than five years. That's where I learned to deal with clients, be on time and stay calm when things go wrong live. I've been studying development since 2023, and designing and building complete websites since 2025.

  1. 3 monthsSales advisor · Royal PrestigeI sold imported cookware. I ran product demos, advised each person and followed the sale through to closing.
  2. 1 yearProduction operator · Qiri ToysI ran the toy production machines. I also did packaging, quality control and kept the warehouse in order.
  3. 5+ yearsProfessional DJI play music at events and parties. I plan each date with the organizers and sort out whatever comes up on the night.
  4. Per campaignFreelance and agency modelCampaigns for clothing and product brands, plus work at events and brand activations.
  5. Feb. 2023Full Stack Development · CoderhouseI started studying programming and I'm still enrolled. I finished high school at CEBA in Córdoba.
  6. Sept. 2025Full stack web developer · Self-employedI started working on my own, remotely from Córdoba. I designed and built complete demos for different kinds of businesses, with bookings, catalogs, forms and panels.
  7. Sept. 2026JAC StudioTomás Abalos and I started JAC Studio, a design, development and content studio. I take care of product and technology: structure, full stack development and quality.

05Crossfader2:04

Two ways to work together

Hiring for your team and getting a website for your business call for different things. Slide the crossfader to your side, A or B, and your part comes to the front.

A · For teams

I design the screen, and I code it too

  • Less back and forth between design and development: I set up the structure, the flows and a visual system built on tokens, and I take it to code myself.
  • You can hand me a whole feature: the interface in React and Next.js, the API in Node.js and the data in PostgreSQL.
  • What I deliver arrives tested and accessible: Vitest, Playwright and axe on every change, AA contrast, keyboard use, reduced motion and screens designed mobile first.
  • I already know a team's everyday tools: Git and GitHub, GitHub Actions, deployments on Vercel and local databases with Docker.
  • I come from sales, a factory and DJing at events, so I know how to deal with people, keep to schedules and solve problems under pressure.
  • I use AI tools as support and I'm still studying. I review, test and can explain everything I deliver.

Available for remote work, as an employee or a contractor. From Córdoba (UTC-3) I can work US or European hours. Native Spanish and intermediate English.

Tell me about the roleView LinkedIn

B · For projects

See your homepage before you decide

UX/UI design
I organize your site so people find what they're looking for and get in touch: structure, flows, screens and a visual system, adjusted together at every step.
Websites
A complete site with all its pages, in Spanish and also in English if you want, with a form that goes straight to your inbox.
Landing pages
One page for a campaign or a service, with one clear goal: getting people to message you on WhatsApp or through the form.
Catalogs with search
Your customers find the product or property they're after: filters, search and favorites, like in CoDesign.
Appointments and bookings
Your clients book on their own, with each professional's real availability, like in Swan Estética. Fewer messages back and forth.
Management panels
A panel to update your content, follow up on inquiries and see your data without touching code.
Fixes, speed and SEO
I review the site you already have and fix what breaks, what loads slowly and what Google can't find.
  1. You tell me what you need and what you already have: text, photos and a domain.
  2. I show you a sketch of the homepage at no cost, before you decide.
  3. We agree on scope and timeline in writing.
  4. I design the structure and the screens. Then I build on a live preview that you can check at every step.
  5. I launch it, show you how to use it and stay available for adjustments.
Ask for your homepage sketch

06Outro0:20

Let's talk

I'm available now, to join a team or to take on a project. Tell me what you need; you don't have to have it all figured out.

What happens next

  1. I read your message and reply myself within one business day.
  2. If it's a role, we set up a call and I send you my CV.
  3. If it's a project, I ask you a few short questions and show you a sketch of your homepage at no cost.
What are you looking for?

This is where I'll reply.

What your business does, what you need and by when. That's enough for me to start the sketch.

If you already have a site, or one you like as an example.

Reply within one business day

I only use your details to reply to you. I don't share them or add you to any list.

Rather write to me directly?