THALLES LEAL

Open to junior roles + freelance

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Junior front-end & full-stack developer Brazil / Remote

Digital work built with gravity.

I build responsive web interfaces and applications with React, Next.js and Node.js, from implementation to deployment.

View selected work Open contact channels

Portfolio / 2026
React · Next.js · Node.js

Profile / How I work

I understand. Then I build.

I turn requirements into responsive interfaces and web applications, balancing clarity, performance and maintainable code.

  • Junior developer
  • Freelance projects
  • Brazil / Remote
See professional overview

Professional signal / Active

Work you can inspect.

Five projects showing my progression from responsive interfaces to tested, production-ready web products.

View the 5 projects
Range / Remote Locating signal
Brazil / Remote

Open to junior front-end or full-stack roles.

Available remotely and for freelance projects.

Featured projects Verified work

05

Operations, private financial analysis, healthcare, solar energy and an agricultural catalog.

↘
Project coverage 05 / 05
React
5/5
Responsive interface
5/5
TypeScript
3/5
Automated testing
2/5
Offline / local-first
1/5
End-to-end practice Current scope
  1. Discovery
  2. Architecture
  3. Interface
  4. Performance
  5. Deploy
  6. Evolution
Expected completion In progress

2026

Systems Analysis & Development / UNIP

Core stack 08
  • React
  • Next.js
  • TypeScript
  • Node.js
  • Tailwind CSS
  • Supabase
  • PostgreSQL
  • GitHub Actions

Selected work / 05 builds

Built around real needs.

Five projects tracing my progression from responsive websites to multi-tenant and local-first products with automated testing.

01 / 05

Workflow

Full-stack product project / Operations management SaaS

I built a SaaS for small agencies to organize clients, projects, deliverables and tasks in one consistent operational hierarchy.

Stack
Next.js / React / TypeScript / Supabase / PostgreSQL / Vitest / Playwright / Vercel
Result
Multi-tenant application with server-side authorization, PostgreSQL RLS, automated tests and a safe read-only demo
Visit live project
02 / 05

Nítido

Front-end product project / Private local-first financial analysis

I built a responsive PWA that imports CSV and OFX statements, processes financial data on-device and turns transactions into explainable dashboards without requiring an account.

Stack
React / TypeScript / Vite / IndexedDB / Web Workers / Vitest / Playwright / Cloudflare Workers
Result
Private offline-capable analysis, 24 automated tests, E2E coverage and CI/CD to Cloudflare Workers
Visit live project
03 / 05

Clínica Voe Alto

Front-end freelancer / Healthcare website

I developed the interface for a multidisciplinary clinic website, organizing accessible content, responsive navigation and contact through WhatsApp.

Stack
React / Vite / Tailwind CSS / JavaScript
Result
Responsive website with a direct WhatsApp contact path
Visit live project
04 / 05

Good Sollar

Full-stack freelancer / Institutional landing page

I developed a responsive landing page for a solar-energy company, with reusable React components, technical SEO and automated deployment.

Stack
React / Vite / Tailwind CSS / GitHub Actions
Result
Landing page published with a mobile-ready interface
Visit live project
05 / 05

Catálogo para Corretores

Full-stack freelancer / Management platform

I built a web application for brokers to manage and publish agricultural machinery, including authentication, CRUD operations and an admin panel.

Stack
Next.js / TypeScript / Supabase / PostgreSQL / Vercel
Result
Catalog with authentication, database and administrative panel
Visit live project

Technical skills / Applied in projects

Tools used in practice.

Capabilities demonstrated across five shipped projects, now covering product architecture, private on-device data, automated testing and production delivery.

Front-end & product

HTML5 · CSS3 · JavaScript · TypeScript · React · Next.js · Tailwind CSS · Vite · PWA · Design systems

Data & architecture

Node.js · REST APIs · Supabase · PostgreSQL · SQL · IndexedDB · Web Workers · Authentication · CRUD · Local-first

Quality & testing

Vitest · Playwright · E2E testing · Accessibility · Responsive design · Performance · Technical SEO

Delivery & security

Git · GitHub · GitHub Actions · CI/CD · Vercel · Cloudflare Workers · Security headers · Web security

Path / Practice + education

Learning by shipping.

Experience01

Full-stack developer

Freelance / Current practice

I turn project requirements into responsive interfaces and web applications, then version, deploy and maintain each delivery.

Good Sollar Clínica Voe Alto Catálogo para Corretores

Education02

Systems analysis & development

Universidade Paulista — UNIP / In progress

Degree in progress at Universidade Paulista (UNIP). Expected completion: December 2026.

Open to conversations

Available. Ready to grow.

Work
Hire / Freelance / Consulting
Mode
Remote / English-friendly teams
Preferred
Evening period

Contact / Start a conversation

Let's talk about your next project.

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