Hello, I'm

RanielliMontagna

A Software Engineer specialized in React, React Native, Node.js, and TypeScript

I developed scalable web and mobile products, REST APIs, and micro frontends for critical operations, connecting architecture, user experience, performance, and business outcomes.

5+ years in software with React, Next.js, React Native, Node.js, TypeScript, Design Systems, CI/CD, testing, accessibility, automation, and AI applied to development.

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AboutMe

Hello! I'm Ranielli Montagna, a full stack software engineer with 5+ years of experience building scalable web and mobile applications. I worked with React, React Native, TypeScript, Node.js, and Next.js on digital products that required performance, code quality, accessibility, and strong user experience.

At Luizalabs, I developed solutions for Magalu physical store operations, impacting inventory and logistics processes across 1,000+ stores and the daily workflow of 1,000+ stock clerks. I also led frontend initiatives in SaaS products, created a Design System adopted across multiple products, and mentored developers.

I have a growing interest in Artificial Intelligence applied to software development, especially LLM integration, automation, agents, and the Model Context Protocol (MCP) for productivity and product evolution.

00+

Years of experience

00+

Projects completed

Ranielli Montagna

Ranielli Montagna

My core competencies

A precise tech stack tailored for global demands.

My professional journey
ProfessionalExperience

5+ years building web and mobile applications, APIs, and product interfaces with a focus on scale, performance, accessibility, technical quality, and measurable impact.

01

Luizalabs

October 2023 - June 2026

02

Smarten

May 2022 - September 2023

03

SBSistemas

May 2021 - May 2022
Luizalabs logo

01

Mid-level Developer

LuizalabsOctober 2023 - June 2026Remote

I worked at Luizalabs, Magalu's technology unit, developing web and mobile applications for physical store operations, REST APIs, and backend solutions for a high-scale national retail environment.

Key achievements:

Developed solutions used in inventory and logistics operations across 1,000+ stores
Contributed to the daily workflow of 1,000+ stock clerks in corporate applications
Maintained REST APIs, integrations, and micro frontends with React, React Native, Node.js, and TypeScript
Collaborated with Product, UX, Backend, and Operations to connect technical decisions to business impact

Technologies used:

ReactReact NativeTypeScriptNode.jsAPIs REST
Smarten logo

02

Front-end Tech Lead

SmartenMay 2022 - September 2023Remote

I worked as a Front-end Tech Lead in SaaS products, leading developers, defining quality standards, evolving interface architecture, and connecting technical decisions to product delivery.

Key achievements:

Technically led a team of developers
Created and maintained a Design System adopted across multiple products
Implemented CI/CD, monitoring, and quality standards
Mentored developers and improved performance, maintainability, and scalability

Technologies used:

JavaScriptReactDesign SystemCI/CDMonitoramento
SBSistemas logo

03

Front-end Developer

SBSistemasMay 2021 - May 2022On-site

I consolidated my professional foundation in front-end development, building applications with a focus on usability, maintainability, typing, reusable components, and engineering best practices.

Key achievements:

Developed front-end applications with React, Electron, TypeScript, and JavaScript
Implemented reusable components and interface standards
Applied maintainability, testing, and code quality practices
Built a solid technical foundation for web products

Technologies used:

ReactElectronTypeScriptJavaScriptFront-end
Project Portfolio
MyProjects

A selection of my most recent work, including web, mobile applications, and APIs that demonstrate my technical skills.

View all projects
GitHubExplore on GitHub
Paludo Imóveis - Real Estate PlatformPaludo Imóveis - Real Estate Platform — 2Paludo Imóveis - Real Estate Platform — 3
1/3
webFeatured
Freelance

Paludo Imóveis - Real Estate Platform

Platform for real estate brokers with public catalog, tokenized link sharing, lead capture, and analytics dashboard.

Full StackFreelance
Property ManagementTokenized LinksLead CaptureBroker DashboardAnalyticsPublic Catalog+2
React 19TypeScriptTailwind CSSRadix UIFramer MotionZustand+9 more
Featured Projects
North Clinic - Management System
web
Featured
Esperto SistemasFull Stack

North Clinic - Management System

Complete management system for clinics and offices, with online scheduling, electronic health records, financial control, and billing.

SchedulingClient ManagementSalesFinancial+4
JavaScriptjQueryFullCalendarChart.js+12 more
Magalu Stockist Mobile
mobile
Featured
LuizalabsFront-end

Magalu Stockist Mobile

Corporate superapp for stockists at Magalu's physical stores, optimizing inventory control, goods receipt, and dispatch.

Order PickingSeparationDispatchGoods Receipt+3
React NativeTypeScriptMicro-frontend
Pratio - POS for Restaurants
desktop
Featured
PratioFull Stack

Pratio - POS for Restaurants

Point of sale (POS) and management system for bars and restaurants, with table and order control, NFC-e issuing, and a digital menu.

Point of SaleNFC-e IssuingTable ControlOrder Tickets+5
ReactElectronTypeScript
Services
HowIcanhelpyourproject

I offer complete development solutions, from conception to delivery, focusing on quality and exceptional results.

Web DevelopmentWEB
API DevelopmentBACKEND
AI IntegrationAI
Mobile DevelopmentMOBILE

WEB

Most Popular

Web Development

Creation of modern, responsive and performant web applications using the best market technologies.

  • High-conversion landing pages
  • Complete e-commerce
  • Administrative dashboards
  • REST and GraphQL APIs
  • External services integration
Get Started

BACKEND

API Development

Robust and scalable backend systems designed to power your applications with high performance.

  • RESTful & GraphQL APIs
  • Microservices Architecture
  • Database Design (SQL/NoSQL)
  • Secure Authentication (OAuth/JWT)
  • Cloud Infrastructure (AWS/Vercel)
Get Started

AI

Most Popular

AI Integration

Smart solutions powered by Artificial Intelligence to automate processes and enhance user experience.

  • LLM Integration (GPT/Claude)
  • Smart Chatbots & Assistants
  • Automated Workflows
  • Data Analysis & Insights
  • Custom AI Agents
Get Started

MOBILE

Mobile Development

Native and hybrid applications for iOS and Android with exceptional user experience.

  • React Native apps
  • Native interface
  • API integration
  • Push notifications
  • App store publishing
Get Started
Let's Work Together

Ready to start your project?

Let's talk about how I can help turn your idea into reality.

Get in Touch
Let'sworktogether

I'm interested in freelance or full-time opportunities. If you have a project in mind or just want to chat, I'd be happy to talk.

Direct email
[email protected]

Available for projects

Response time: ~24h

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