Hello, I am

Jonathas A. de Oliveira.

Web Developer | Software Engineer

Passionate about building elegant digital solutions, with a focus on clean code, automation, and experiences that truly work.

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Foto de Seu Nome — Desenvolvedor Web

// about me

Who am I

Software Engineer focused on Web Development, Backend, and Process Automation. Experience in scalable applications and automated workflows using JavaScript, TypeScript, Next.js, Node.js, Python, Firebase, Supabase, and PostgreSQL.

Strong problem-solving skills with a background in IT infrastructure and technical leadership.

Let's talk

🎯

Focus

Full Stack Web Development

🛠️

Background

IT and Infrastructure

📍

Location

Curitiba, PR - Brazil

🚀

Available

For new opportunities

// education

Training & Courses

🎓 Academic Background

Graduate Certificate in Software Engineering

Estácio University 2024 — 2025

Associate Degree in Internet Systems

Estácio University 2020 — 2022

Aircraft Logistics and Maintenance

School of Aeronautical Specialists - EEAR 2014 — 2015

Assembly, Maintenance and Networks

Microlins College 2009 — 2011

📚 Courses and Certifications

CS50x

HarvardX

Cloud Computing / AWS

Ka Solution, Udemy

DevOps

Alura

IT Infrastructure Library Management

Alura, Fundação Bradesco, Senac

Game Development (Unity, Unreal, Game Design)

Alura, Udemy, Senac

// works

Projects

Nome do Projeto 1

Screenshot do Projeto

Guariní e-sport's institutional website

This is the institutional website for the Guariní e-sport team, developed to consolidate its online presence and present information about the team. It addresses the need for visibility, content organization, and communication with the public and potential partners.

HTML CSS JavaScript Firebase Supabase Git/GitHub

View Website

Nome do Projeto 2

Screenshot do Projeto

Doctoralia Brazil's corporate intranet

Doctoralia Brazil's corporate intranet was developed to centralize internal services such as opening support tickets, accessing benefits, and managing organizational resources. It resolves the issue of scattered tools and improves operational efficiency and communication among employees.

HTML CSS JavaScript Git/GitHub AWS

View Website

Nome do Projeto 3

Screenshot do Projeto

Gugli's online store

Gugli's online store focuses on hair products for pre- and post-transplant use, offering a simple and user-focused shopping experience. It solves the difficulty of finding specific and reliable products for this audience in one place.

HTML CSS JavaScript Nuvemshop

View Website

Nome do Projeto 4

Screenshot do Projeto

MedVida's institutional website

MedVida's institutional website presents and centralizes occupational health and safety services for companies. It resolves the complexity and bureaucracy in OHS management, facilitating access to integrated solutions in one place.

HTML CSS JavaScript Wordpress Hostgator

View Website

Nome do Projeto 5

Screenshot do Projeto

Dr. Alex's institutional website

Dr. Alex Treiger Grupenmacher's personal institutional website, developed to showcase his career path, specialties, and facilitate appointment scheduling. It addresses the need for a professional digital presence, bringing together reliable information and direct access to services in one place.

HTML CSS JavaScript Wordpress Hostgator

View Website

Nome do Projeto 6

Screenshot do Projeto

Dr. Camila's landing page

Landing page developed to attract patients in the gynecology field, focusing on conversion and presentation of services. It highlights professional authority and facilitates appointment scheduling in a practical and efficient way.

HTML CSS JavaScript Wordpress Hostgator

View Website

Nome do Projeto 7

Screenshot do Projeto

Open Capital's landing page

Landing page developed for a financial advisory company, focusing on presenting credit solutions and attracting clients. The structure prioritizes clarity of information, lead generation, and strengthening brand credibility.

HTML CSS JavaScript Wordpress Hostgator

View Website

Nome do Projeto 8

Screenshot do Projeto

Zeiss Vision Optics's landing page

Landing page developed for an optical store focused on ZEISS solutions, with a conversion-oriented approach and brand positioning. The project structure emphasizes product presentation and facilitates the user's journey to contact, reinforcing authority and trust in the optical segment.

HTML CSS JavaScript Wordpress Hostgator

View Website

Nome do Projeto 9

Screenshot do Projeto

Sol na Varanda's online store

An online store developed for Sol na Varanda, focused on conversion, usability, and performance. The project organizes the product catalog and simplifies the purchase journey, providing a seamless experience and strengthening the brand's digital presence.

HTML CSS JavaScript Wordpress Hostgator

View Website

Nome do Projeto 10

Screenshot do Projeto

AFIATEC's landing page

Landing page under development for AFIATEC, focusing on performance, scalable structure, and user experience. The solution aims to organize the presentation of customized services and facilitate lead conversion in the industrial sector.

HTML CSS JavaScript Wordpress Hostgator

View Website

Nome do Projeto Temp

Screenshot do Projeto

Institutional website for a barbershop.

Institutional website for a barbershop focused on online booking integrated with Google Calendar, allowing clients to book services quickly and easily. It eliminates manual scheduling management, automating reservations and optimizing customer service.

HTML CSS JavaScript Git/GitHub Vercel

View Website

Nome do Projeto Temp

Screenshot do Projeto

Institutional website for aesthetic clinic

Institutional website for an aesthetic clinic focused on presenting services and online scheduling, offering a practical and elegant experience for the client. It solves the difficulty of advertising and booking appointments, centralizing everything on a single platform.

HTML CSS JavaScript Git/GitHub Vercel

View Website

// trajectory

Experience

💻 Development

Web Designer | Full Stack Developer

Luna Communications Agency 2026 — Presente

Development and maintenance of websites and e-commerce platforms with a focus on performance, SEO, and UX/UI.
Creation of responsive interfaces (Elementor, HTML, CSS) and optimization for multiple devices.
Customization of themes, pages, and components according to client needs.
Integration of functionalities and optimization of loading speeds (Core Web Vitals).
Management of hosting, servers, and DNS, ensuring availability and stability.
Definition of architecture, technical standards, and code organization.
Support, monitoring, and maintenance of applications in production.
Interface with clients and stakeholders, translating requirements into digital solutions.

Web Developer

GRN Digital Solutions 2024 — 2026

Experience as a developer and technical lead responsible for the design, architecture, and execution of solutions at GRN Digital Solutions, a company I founded and lead.
Development of web and mobile applications using JavaScript (ES6+), TypeScript, Python, HTML, and CSS, focusing on performance, scalability, and best practices in Software Engineering.
Back-end development and integrations with Node.js and Python, including building and consuming REST APIs, authentication, and access control.
Automation of processes and integrations between systems, connecting APIs and external services using Python and low-code tools.
Database modeling and administration such as Firebase, Supabase, and PostgreSQL, including data structuring, queries, security rules, and access policies.
Implementation of business logic, validation, and data manipulation in web applications.
Code versioning and collaboration using Git and GitHub, following best practices in version control.
Technical project management with Jira, including backlog organization, task prioritization, and delivery tracking.
Technical coordination of a multidisciplinary team (development and IT), focusing on mentoring, code review, and standardization of practices.
Consultative role in the development of digital solutions, translating business needs into scalable technical implementations.

🖥️ Infrastructure & IT

Mid-level IT Analyst

Doctoralia Brazil 2021 — 2025

Tier 1/Tier 2 technical support with troubleshooting, critical incident analysis, and RCA (Root Cause Analysis).
Identity and access management (IAM), security, and permissions governance.
GLPI administration and customization (ITSM and inventory), with asset traceability
Workflow modeling and automation (Pipefy), integrating processes and areas.
Development of internal automations and tools (scripts, Slack bots).
Intranet development and maintenance (HTML, CSS, JavaScript, GitHub).
SLA definition, demand prioritization, and continuous improvement (ITIL).
Environment standardization, technical onboarding, and access management.
Operational leadership, demand organization, and supplier interface.

IT Analyst

Brazilian Air Force - FAB 2011 — 2017

Level 1/Level 2 technical support with troubleshooting on hardware, software, networks, and corporate systems.
Access administration (Active Directory, Google Workspace) with a focus on security and governance.
Infrastructure support (servers, virtualization, backup, firewall, monitoring).
Network configuration and troubleshooting (LAN/Wi-Fi, switches, routers).
Ticket management (ITSM, SLA, RCA) and continuous improvement (ITIL).
Environment standardization (Windows/Linux) and technical documentation.
Work on critical aeronautical systems, ensuring high availability and reliability.
Technical leadership as a 3rd Sergeant, supporting the team and level 1/Level 2 escalation.

// technical stack

Skills

JavaScript

ES6+, DOM & APIs

🔷

TypeScript

Typing & Scalability

▲

Next.js

App Router & SSR

Node.js

Backend & APIs REST

🐍

Python

Automation & Scripts

HTML5

Semantic & Accessible

CSS3

Flexbox, Grid & Responsive

🔌

APIs REST

Integrations & Consumption

🔥

Firebase / Supabase

Auth, Database & Storage

🐘

PostgreSQL

Modeling & Queries

Git & GitHub

Version control & Collaboration

🐧

Linux / Windows

Networks & Infrastructure

⚙️

n8n / Automation

Workflows & Integrations

📋

Scrum / Kanban

Jira, GLPI & Clean Code

// talk to me

Contact

Open to opportunities, collaborations, and new projects.

Email Contact me

LinkedIn linkedin.com/in/jonathasade-oliveira/

GitHub github.com/jonathaslobo

Prefer to talk directly? Call me on WhatsApp.

Call me on WhatsApp