ChamaFácil
Full-stack delivery dispatch platform with real-time driver tracking, push notifications and job queues — mobile app, web dashboard and a high-throughput backend.
FlutterReactNode.jsPostgreSQLRedisWebSocketFCM
A developer who ships
I'm a Senior Flutter & Fullstack Developer with 8+ years in software development, the last 4 specialized in production mobile apps for Android, iOS and Web. I focus on offline-first architecture, Clean Architecture / MVVM and clean, well-tested Dart codebases (TDD, golden tests, CI/CD on Azure DevOps).
Beyond Flutter, I build complete backends with Node.js, PostgreSQL and Firebase — REST APIs, real-time WebSocket systems and React dashboards. I integrate AI / LLM APIs into real products and collaborate with international teams (EN / PT / ES).
Where I've worked
ForLogic
Senior Flutter Engineer
Nov 2024 – present
Own the Flutter layer of MetroEx (industrial metrology / ISO 17025): offline-first sync, local calculation and an offline audit trail (→ Mixpanel) for field data integrity. Drove architecture refactors and QA semantics; ~30% more test coverage, 99%+ crash-free, Azure DevOps CI/CD.
FlutterOffline FirstClean ArchitectureAzure DevOps
Designed and shipped a multi-app delivery dispatch platform end-to-end: Flutter driver app (+ iOS PWA), React admin/store panels, Fastify API, live GPS via WebSocket, Mercado Pago settlements, plus an AI WhatsApp sales agent and self-service checkout. CI/CD on Cloudflare Workers.
FlutterNode.jsFirebaseAICloudflare
ATS Informática
Software Developer
2017 – 2024
Built Flutter interfaces serving 5,000+ users with focus on performance and UX. Managed state with MobX and modularized project architecture. Automated testing and CI/CD via Azure DevOps, reducing deploy time by ~50%. Delivered full-stack business software and ERP modules.
FlutterMobXFull StackREST APIsAzure DevOps
Selected work
Real, shipped products — from offline-first enterprise apps to full-stack platforms.
Welcoming
Mobile app published on the Play Store, built with Flutter for a smooth and responsive Android experience with clean state management and modern UI.
FlutterDartFirebase
PM-PE
Mobile app for the Polícia Militar de Pernambuco — field tools for officers with offline-first data capture, real-time sync and a clean Flutter interface built for high-reliability environments.
FlutterDartOffline-FirstGovernment
e-gage
Contributed to e-gage's Flutter mobile app — an all-in-one platform to engage, train and communicate with frontline employees, serving enterprise clients across Brazil.
FlutterDartEnterpriseB2B
Ficar Limpo
Consumer mobile app published on the Play Store, focused on a smooth, responsive Flutter UI and clean state management.
FlutterDartREST API
ReciboAI
AI-powered receipt & document generator with a freemium model — built end-to-end, from landing page to LLM integration and billing.
FlutterClaude APIAISaaS
Tech stack
⚔ Core
- Flutter
- Dart
- Mobile Architecture
- State Management
- MobX
- Provider
🛡 Architecture
- Offline-First
- Clean Architecture
- MVVM
- TDD
- Golden Tests
🔥 Backend & Cloud
- Node.js
- PostgreSQL
- Firebase
- REST APIs
- WebSocket
- Redis
- CI/CD
🌐 Web & Extras
- React
- TypeScript
- AI Integration
- LLM APIs
- Azure DevOps
- Git
- FCM
Phrases that drive me
"Make it work, make it right, make it fast."
— Kent Beck"Simplicity is the ultimate sophistication."
— Leonardo da Vinci"First, solve the problem. Then, write the code."
— John Johnson"What is truly worthy is worth the effort."
— Santa Teresa of Ávila
Common questions
Are you available for freelance or remote Flutter projects?
Yes — I'm open to freelance contracts, remote full-time roles and consulting work worldwide. Projects of any size: from MVPs to enterprise apps.
Are you a fullstack developer or only Flutter?
Both. Flutter is my specialty, but I build complete systems: Node.js backends, PostgreSQL databases, Redis queues, WebSocket real-time layers and React web dashboards. I deliver the full product, not just the app.
What platforms do you target?
iOS, Android and Flutter Web — all from a single codebase. I have apps published on the App Store and Play Store.
What is your tech stack?
Mobile: Flutter, Dart, MobX, TDD, Clean Architecture. Backend: Node.js, PostgreSQL, Firebase, Redis, WebSocket. Web: React, TypeScript. AI: Claude API, LLM integrations. DevOps: Azure DevOps CI/CD, Git.
How can I contact you?
Email: [email protected] · LinkedIn: linkedin.com/in/diego-emanuel/ · WhatsApp — I usually reply within a day.
What timezone are you in? Can you work with US/EU teams?
I'm based in Brazil (UTC-3). That gives 4–6 hours of overlap with US Eastern time and a full afternoon overlap with Central European time. I work async-first and communicate in English, Portuguese and Spanish.
Hire a Senior Flutter developer
I'm employed full-time and I run Falcão Digital — so I'm not taking everything that comes. For the right role or project, I am absolutely open to a conversation. Three shapes that tend to work: full-time remote, a defined freelance scope, or short consulting. Flutter and Dart on mobile, plus the backend and web around them. Based in Brazil (UTC-3), working in English with teams in the US and Europe.
Full-time remote
Join your team as a senior Flutter or fullstack engineer on US or EU hours. Async-first, English-speaking, 4–6h of daily overlap with US Eastern and a full afternoon with CET.
FlutterDartNode.jsReact
Freelance projects
End-to-end delivery of a Flutter app — architecture, build, App Store and Play Store release — or a defined scope inside an existing codebase. MVPs through enterprise apps.
MVPApp StorePlay StoreOffline-First
Consulting & code review
Short engagements for teams already running Flutter: offline-first architecture, Clean Architecture / MVVM refactors, raising test coverage and setting up CI/CD.
ArchitectureTDDCI/CDCode Review
Tell me about your project →
Open to the right opportunity
Let's build something
Hiring a Flutter developer, or need a remote Flutter contractor for a project? Rest by the fire and send a message — I usually reply within a day.
📍 Brazil (UTC-3) · 4–6h overlap with US Eastern · Full afternoon overlap with CET · Async-ready, English-speaking teams welcome.
Open to the right opportunity