Hire the Best JSON Developers
in Brazil

Having both Backend and Frontend coding skills, I want to work with you as a contributor and a problem solver. I am a Full Stack developer with 12 years of web development. From automation scripts to machine learning models, I’m interested in solving all sorts of problems with technology in creative and innovative ways. Here are the skill sets I have: ☑️ Python, FastAPI ☑️ JavaScript, React, Angular, D3.js, Bootstrap, Tailwind CSS, Typescript, Node.js ☑️ Java, SpringBoot ☑️ PostgreSQL, MongoDB ☑️ Docker

I am a full stack developer ready to help you solve your problems. I work as a software developer since 2011, and during these years I worked with a very diverse set of technologies and environments. I majored in Computer Science in 2013 and got a master's degree in 2016. I specialize in automation and web app development and have tons of experience with all the technologies involved in the process, from writing the code to deploying the project. I also love to discuss your projects and ideas, if you have questions about the process or want to bounce some ideas feel free to send me a message :)

I am a software developer with 17 years of experience, using technologies such as: Delphi, PHP, Postgres, Firebird, GiT, SVN. I've also worked with Dataflex, Visual DataFlex and PowerBuilder, but in the last 10 years, I've been more focused on the technologies of Embarcadero Delphi (7, 10.x), in particular, development of API Rest application servers with technologies such as Datasnap and TMS Aurelius (ORM). Of these projects, 15 years of management were for projects in the management area public, in particular: Accounting, Tax, Legal (Attorneys). I also worked on parallel projects, in the areas of industry and business. Competence in managing the software development cycle, identification of need or scope, survey requirements, software architecture, diagram design streams(Bpmn), code, application testing and documentation technique. In recent years, I have been working especially with software integration using RestFull tecnology

I am a Brazilian student and developer. My objective is to keep learning new technologies and tools and build real-world applications that generate value.

I build digital tools and experiences, often programming the more complex pieces so others can use these tools to build the full web app. Additionally I advise what is possible to be done given a timeline and a budget and continue to share my impressions so we can adjust and manage risks based on how development actually progresses. It is time to kick off that new priority in your company! I work mainly with frontend and application logic, with basic infra skills to get my work online. By application logic I mean generating PDFs, payment processing, maps and vehicle routes, and so on. By frontend I mean what the user of the app sees, including very dynamic app screens. I have thousands of hours of work on these two plugins here, I use them as the flagship examples of my past work of creating plugins for a no code platform, one is a powerful PDF designer and generator that has worked reliably since 2018 and the other is a powerful multi purpose map component, it has a large variety of features  to meet a very wide array of use cases, see their links in the portfolio section please. As you can see I produced documentation and provided support as well, until I sold them both in 2024. I also made dozens of other plugins, including Stripe and other integrations, data dump processing (ETL), charts, VoIP and phone calls (Telnyx), browser extensions, automated scraping, SFTP client, code highlighter, words highlighter and a myriad other app logic needs. I also worked with different serverless functions providers, specifically Microsoft Azure functions, Netlify functions and AWS Lambda functions. Now, more recently I built Tupan, which is my current side project, also see its link in the portfolio section. Tupan is a nocode tool to create web apps. I made a write up on Tupan's internals and why I took each decision, you can see the link in the portfolio section too. So alongside general app logic and Bubble plugins, I have experience with: - SvelteKit which handles the frontend with dynamic and static pages; - Appwrite which handles the backend with users, functions, database and more, it is a Supabase alternative; - Docker to maintain the app online. - Caddy to serve as a whitelabel manager and front door of the whole stack. With me, you always get an instruction manual alongside the code. Projects include deployment to live, when applicable.

I build fast, reliable web applications that solve real business problems, front end to database, ideas to shipped product. Hi, I'm João Gabriel, a full-stack web developer. Across 10+ Upwork projects (all highly rated), I've delivered tools that automate tedious work, replace manual processes, and turn slow, hands-on workflows into software that runs itself. A few things I've built: - A savings-management platform for an accountant who was running every client's savings plan by hand. I built a dual-interface web app: clients create plans, make installment payments, track their growth, and request withdrawals, while the accountant manages every client, launches new plans, and approves withdrawals from a single admin dashboard. Replacing a fully manual process with one automated platform. (Nuxt/Vue 3, FastAPI, PostgreSQL.) - A lead-generation tool for a music producer that discovers emerging artists on SoundCloud, organizes them in a database, and runs respectful, rate-limited outreach. A system that has brought the producer a steady stream of new clients. - A desktop point-of-sale app for a juice shop, designed around an image-based interface so employees who couldn't read could ring up orders confidently, with built-in inventory tracking for the owner. It served the shop's staff reliably for a long time. My toolkit: Vue 3/Nuxt and React/Next.js (TypeScript) with Tailwind CSS on the front end; Python (FastAPI) and Node.js/Express on the back end; PostgreSQL & MySQL for data; plus REST API design and third-party integrations (OAuth, transactional email, Google APIs). How I work: clear communication, realistic timelines, and delivery on schedule every time. Tell me what you're trying to build and I'll tell you exactly how I'd approach it, before you commit a dollar. Let's talk.