👋 Hello! I'm

Chrystian Michell

Senior Flutter Engineer & Software Architect · Tech Lead

Technical leader with over 5 years building digital products that solve real problems. Specialized in Flutter and clean architecture, I have led the complete cycle of more than 10 cross-platform applications (iOS, Android, Web, and SmartTV) deployed in 11 countries across Europe and LATAM, impacting over 50,000 users. I combine deep technical expertise with business perspective and real empathy for the end user.

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About Me

Key achievements and real-world project results.

I am a Senior Flutter Developer with experience in cross-platform projects (iOS, Android, Web, and SmartTV). I specialize in clean architecture, performance optimization, and pixel-perfect design. I have led technical teams and managed the complete product lifecycle, from idea to production.

My focus is always on quality, scalability, and user experience. I also have experience in full-stack web development, applying modern frameworks and advanced patterns. My previous experience of over 10 years in technology retail gives me a unique perspective: I understand both technical complexity and real end-user needs as well as business objectives.

I am passionate about translating complexity into clarity: creating scalable architectures, establishing processes that work, and developing teams that grow. I firmly believe that the best technology is the one that solves business problems sustainably. "Quality is a pillar of my work".

10+

Apps in Production

5+

Years of Experience

50K+

Users Impacted

11

Countries Deployed

Highlights

Key achievements and real-world project results.

🏨

Technical leader of OTT platform deployed in over 30 hotels across Europe and LATAM

🚀

Scalable architecture supporting +1000 concurrent users with 95% uptime

👥

Leadership of multidisciplinary teams of up to 9 people with agile methodologies

⚡

Performance optimization: 60% improvement on Smart TVs and 40% reduction in deployment time

🔗

Successful integration with +10 hotel PMS systems (Oracle OPERA, Mews, Cloudbeds)

🌍

More than 50,000 users impacted through cross-platform applications

Technical Skills

Flutter

Dart

Clean Architecture

BLoC Pattern

TypeScript

JavaScript

Astro

React

Node.js

Firebase

WebSockets

Docker

GitHub Actions

AWS

Technical Leadership

Team Management

Git

CI/CD

GetX

Riverpod

Provider

TailwindCSS

auto_route

get_it

dio

go_router

JSON

SolidJS

CSS Modules

PWA

Sentry

JWT

Hive

SharedPreferences

Netlify

Video.js

Postman

Figma

Shaka Player

sqflite

Flutter

Dart

Clean Architecture

BLoC Pattern

TypeScript

JavaScript

Astro

React

Node.js

Firebase

WebSockets

Docker

GitHub Actions

AWS

Technical Leadership

Team Management

Git

CI/CD

GetX

Riverpod

Provider

TailwindCSS

auto_route

get_it

dio

go_router

JSON

SolidJS

CSS Modules

PWA

Sentry

JWT

Hive

SharedPreferences

Netlify

Video.js

Postman

Figma

Shaka Player

sqflite

Flutter

Dart

Clean Architecture

BLoC Pattern

TypeScript

JavaScript

Astro

React

Node.js

Firebase

WebSockets

Docker

GitHub Actions

AWS

Technical Leadership

Team Management

Git

CI/CD

GetX

Riverpod

Provider

TailwindCSS

auto_route

get_it

dio

go_router

JSON

SolidJS

CSS Modules

PWA

Sentry

JWT

Hive

SharedPreferences

Netlify

Video.js

Postman

Figma

Shaka Player

sqflite

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Professional Experience

Career path, key roles and achievements in companies and projects.

Tech Lead & Flutter Architect

YUVOD

📍 Remote from Madrid for company in Valencia, Spain

January 2023 – January 2025

Led technical strategy for an OTT platform (content streaming) for the hotel sector deployed in over 30 hotels across Europe and LATAM. Managed multidisciplinary teams of up to 9 people, implemented scalable architectures with Clean Architecture and BLoC, and established CI/CD pipelines that reduced deployment time by 40%. Achieved 60% performance improvements on low-end Smart TVs through advanced spatial navigation and modular player with DRM. Successful integration with +10 hotel PMS systems (Oracle OPERA, Mews, Cloudbeds).

FlutterDartBLoCClean ArchitectureVideo.jsFirebaseDockerAWSGitHub ActionsWebSocketsauto_routeget_it

Frontend Architect & Full Stack Developer

NEXTIVAL (Pro Bono Project)

📍 Remote

February 2025 – June 2025

During gap between roles, led architecture and frontend development of content management system for music festivals. Defined complete frontend architecture using Astro with SolidJS for hybrid rendering (SSR/SSG), optimizing SEO and performance with load times under 1.5 seconds. Project completed and delivered for production use.

AstroSolidJSTypeScriptTailwindCSSNode.jsWebSocketsJWTSpotify API

Senior Flutter Developer

OPTIMUS APPS LAB (Freelance)

📍 Hybrid, Madrid, Spain

April 2021 – December 2022

Developed end-to-end mobile solutions for B2B clients in neobanking, logistics, and tourism. Delivered over 5 Flutter applications for iOS, Android, and Web, achieving 35% reduction in time-to-market through standardized architectures. Managed direct client relationships, translating business needs into technical requirements.

FlutterGetXRiverpodBLoCFirebaseSupabaseREST APIsBiometric Auth

Product & Technology Specialist – Retail

World Duty Free Group, Fnac, Worten, Carrefour

📍 Madrid, Spain

May 2008 – February 2021

13 years on the front lines of technology retail, developing unique perspective on user-technology interaction. Progression from product specialist to higher responsibility roles, managing teams and training new members. This experience underpins my current approach to customer-centric product development.

Team ManagementTrainingCustomer ServiceConsultative SalesProduct Analysis

Featured Projects

Top 3 standout projects showcasing advanced Flutter architecture, technical leadership, and scalable solutions.

OTT Platform for Hotels

Sector: Streaming & Hospitality

Role: Lead Flutter Developer & Software Architect

Scalable architecture deployed in production with automated CI/CD. Cost reduction through shared code across 6 platforms. Optimized performance with lazy loading, strategic caching, and tree shaking. High availability across multiple environments.

Cross-platform streaming platform with Clean Architecture and BLoC pattern. Dual-entry system for Smart TV (HTML renderer) and Web (CanvasKit) with scalable modular architecture. Custom video player with DRM, multi-audio/subtitles, and adaptive streaming. Local persistence with IndexedDB via JS interop, smart HTTP caching with configurable strategies. 68+ reusable UI components, 17+ BLoCs for state management, REST API integration with JWT interceptors. Typed routing system with 33+ routes. Complete CI/CD with GitHub Actions and Docker for multiple environments.

+30 Active hotels

Flutter 3.16Dart 3.0+BLoC PatternClean Architectureauto_routeGetItDioIndexedDB +6

🌐 Production

Personal Portfolio – Chrystian Michell

Sector: Personal Branding

Role: Developer & Designer

SEO optimized for professional positioning with complete ES/EN internationalization.

Modern and responsive personal portfolio developed with Astro for optimized static rendering. Modular architecture with TypeScript, i18n translation system, advanced SEO with structured data, PWA with manifest and service worker. Performance optimization with lazy loading, code splitting, and asset compression. Automated deployment with GitHub Actions.

100/100 Lighthouse

AstroTypeScriptCSS ModulesGitHub ActionsNetlifyPWA

🌐 Production

Cross-Platform Digital Banking Application

Sector: Digital Banking & FinTech

Role: Full-Stack Flutter Developer

Production banking application with premium user experience across three platforms using a single codebase, reducing development costs by 70%. The automated identity verification process reduces manual validations by 80%, enabling customer onboarding in under 10 minutes.

Comprehensive banking application for iOS, Android, and Web enabling management of personal and shared accounts, bank transfers, instant peer-to-peer payments, and virtual/physical card management. I implemented an advanced identity verification system with AI-powered automatic document capture, facial recognition, and NFC reading of electronic documents. The app features multi-level authentication with biometrics (Face ID/Touch ID/Fingerprint), real-time notification system, and modular architecture that separates business logic from UI for enhanced maintainability and scalability.

FlutterGetXFirebaseGraphQLNFCBiometricsGoogle PaySentry

View More Projects

Blog Posts

Latest articles and insights on development, software architecture, and tech experiences. Discover ideas, lessons learned, and trends.

The Technical Unicorn: Flutter + Dart as a Full-Stack AI-Native Stack

🖊️ Chrystian Michell Álvarez Sánchez 3 de noviembre de 2025

Deep exploration on how Flutter and Dart are revolutionizing full-stack development, enabling small teams to build modern, AI-native applications with a single language.

Flutter Dart FullStack AI Backend Serverpod TechLeadership ProductEngineering Innovation

AI Coding Assistants in Flutter: Exponential Productivity or Copy-Paste Developers?

🖊️ Chrystian Michell Álvarez Sánchez 28 de octubre de 2025

A deep dive into the impact of AI coding assistants in Flutter and cross-platform development: benefits, risks, and ethical reflections.

Flutter CrossPlatform AI Productivity Architecture Portfolio Ethics

AI-First Architecture for Flutter: Gemini CLI, MCP Server and Firebase AI Logic

🖊️ Chrystian Michell Álvarez Sánchez 26 de noviembre de 2025

Explore how to automate Flutter development, integrate AI best practices, and create intelligent apps without backend thanks to Gemini, MCP and Firebase.

Flutter Gemini Firebase AI MCP Architecture Portfolio Dart AIFirst

Explore more posts

Contact

I am available for new technical leadership opportunities, senior development roles, and specialized consulting.

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⚡

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🤝

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