imaginatronai.com
01 / AI · Web + Mobile · Full-Stack LIVE
Imaginatron
An AI creative studio for images, video, music, 2D and 3D, in the browser and on mobile.
React NativeExpoTypeScriptNode.js
Available for selected opportunities
RENAN MOMESSO / REACT · MOBILE · AI
Senior Software Engineer
I build fast, scalable web & mobile products.
8+ years building production applications across mobile, web, cloud and AI products.
React Native · React · Next.js · Node.js · AI
Live in production
8+
years building
8+
Years of experience
Mobile + Web
Production products
Full-Stack
React → Node → AWS
AI
LLMs + media generation
Global
Remote international teams
FEATURED WORK / 01
Selected projects(05)
Real products, live in production. Pick one and explore it right here.
lymyheart.com
02 / E-commerce · Next.js · Cloudflare LIVE
Lymyheart
A premium storefront for 925 sterling silver jewelry.
Next.jsReactTypeScriptCloudflare
nitrofitsport.com.br
03 / E-commerce · Next.js · SEO LIVE
Nitro Fitness
A sports nutrition store for supplements, fitness apparel and accessories.
Next.js 16React 19TypeScriptTailwind CSS 4
dubairro-dashboard.com
04 / SaaS · Multi-tenant · Web LIVE
Du Bairro Dashboard
One dashboard to sell on every channel: WhatsApp, Shopee, Mercado Livre and your own store.
React 19TypeScriptTanStack StartTanStack Router
AI Tool · Web
CV Builder Pro
Interactive preview / 02
Explore the products
01 / 05
AI · Web + Mobile · Full-Stack
Imaginatron
An AI creative studio for images, video, music, 2D and 3D, in the browser and on mobile.
One studio for every AI creative tool: image and video generation, talking avatars, background removal, upscaling, 2D/3D animation and a timeline editor, all on a credit-based economy.
MY ROLE
Full-stack / Product Engineer
PLATFORMS
Web · iOS · Android
React NativeExpoTypeScriptNode.jsRedisBullMQ
MORE WORK
Apps, AI experiments & open source
Smaller builds, demos and teaching projects.
Kimber FreelaFinder
A freelancing marketplace app: services, portfolios, real-time chat, payments and reviews on AWS Amplify.
React NativeAWS AmplifyGraphQLTypeScriptS3
Pokémon AI Chat
A streaming AI chatbot for iOS, Android and web, built with Expo and Anthropic's Claude API, with test coverage.
React NativeExpoClaude APIStreamingJest
Brain Games
A collection of brain-training mini games for mobile, with cloud sync through AWS Amplify.
React NativeExpoAWS AmplifyTypeScript
02 / How I build products
How I build products
01
Performance
Profiling, render optimization, lazy loading, caching and 60fps UX.
02
Architecture
Feature-based systems designed for maintainability and scale.
03
Product Thinking
I don't just implement tickets. I care about UX, edge cases and outcomes.
04
Quality
Tests, CI/CD, monitoring and production-safe releases.
AI ENGINEERING
Not just API calls.
Deep experience building AI-powered products, from model routing and async processing to credit systems and real-time generation pipelines. Production work with multiple AI providers, background job queues and scalable storage.
Model routing
LLM integrations
Image generation
Video generation
Prompt workflows
RAG pipelines
Async processing
Model cost optimization
Token/credit systems
Storage & caching
03 / THE JOURNEY
Experience
012024 — 2026
Senior React Native / Senior React & Next.js Developer
BairesDevRemote
- →Delivered React, React Native, and Next.js features through implementation, testing, release, and production support across mobile, tablet, TV, and web surfaces.
- →Optimized runtime and rendering performance, loading and navigation flows, and production observability using analytics and structured logging.
- →Built and maintained automated test coverage with Jest, React Testing Library, Cypress, and Playwright, integrated into GitHub Actions CI/CD.
ReactReact NativeNext.jsTypeScriptRedux ToolkitExpoJestCypressPlaywrightGitHub Actions
022023 — 2024
Senior React & React Native Developer
Secretaria da Fazenda (EDS)São Paulo, Brazil
- →Built a government project from scratch using Next.js, React Native, React, TypeScript, Redux, React Query, Node.js, and Express.
- →Created a scalable modular architecture, reusable component system, and development conventions following SOLID principles.
- →Mentored two developers, performed code reviews, and helped ship the first production release.
ReactReact NativeNext.jsTypeScriptReduxReact QueryNode.jsExpressTailwind CSS
032023
Senior Full-stack Developer
MergeRemote
- →Built a cross-platform streaming aggregator from scratch, integrating major video and music platforms.
- →Designed a scalable React/Redux and Node.js/Express architecture and optimized data-heavy flows with TanStack Query, Redis, and Bull Queue.
ReactReduxNode.jsExpressTanStack QueryRedisBull Queue
042022 — 2023
Software Engineer
Metrobi (Techstars Boston '19)Remote
- →Shipped logistics and delivery features across the React Native driver app, agency dashboard, and web platform.
- →Migrated JavaScript to TypeScript and class components to functional components, improving maintainability and code quality.
- →Implemented real-time delivery tracking and route/status synchronization using Firestore and Firebase.
React NativeReactTypeScriptMobXFirestoreFirebaseAWS
052020 — 2021
Mid-level React Native Developer
TudduRemote
- →Built a fashion e-commerce mobile application from scratch using React Native, TypeScript, Styled Components, Storybook, and unit tests.
- →Created reusable components and helped define architecture and development patterns for the product.
React NativeTypeScriptStyled ComponentsStorybook
Technical toolkit
Mobile
React NativeExpoSkiaReanimatedReact NavigationFlashList
Frontend
ReactNext.jsTypeScriptTailwind CSSReduxTanStack Query
Backend
Node.jsExpressRESTGraphQLRedisMongoDB
Cloud
AWSS3LambdaCognitoDynamoDBCloudflare Workers
Quality
JestReact Testing LibraryCypressPlaywrightGitHub ActionsCI/CD
AI
OpenAIGeminiReplicateRAGBullMQAI Media Generation
What people say
“Renan demonstrated an incredible ability to adapt, quickly learning the technologies used by the team and contributing significantly to the project from the very beginning.”
“He delivered high-quality work consistently, with strong attention to performance and user experience. A reliable senior engineer who takes ownership.”
About
I'm a software engineer based in São Paulo, specialized in building mobile and web products. Over the past 8+ years, I've worked across React, React Native and full-stack JavaScript, building new products as well as improving large existing applications. I'm especially interested in performance, product architecture and AI-powered experiences.
- Based in
- São Paulo, Brazil · UTC−3
- Experience
- 8+ years in production
- Focus
- Mobile, web & AI products
- Languages
- Portuguese · English
- Open to
- Senior roles & product collaborations