👋 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.

Contact Me View Projects

About Me

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

🏨

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

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.

YUVOD – OTT Platform for Hotels

YUVOD – OTT Platform for Hotels

Deployed in +30 hotels across Europe and LATAM. Smooth SmartTV experience, reliable deployments, and extensible architecture. 35% improvement in guest satisfaction according to post-stay surveys.

Cross-platform streaming platform for SmartTVs, mobile, and web with multi-entry architecture and dynamic UI selection. Advanced spatial navigation with NavigationHandlerBloc, support for nested menus, grids, and carousels. Modular player with DRM, dynamic subtitles, token authentication, and fullscreen. DevOps with RPS in pubspec.yaml, Docker Compose, and Git Hooks in Dart.

FlutterBLoCauto_routeget_itVideo.jsDockerGitHub ActionsWebSockets

🌐 In Production

⭐ Featured Project

BNC10 – Neobanking Frontend

BNC10 – Neobanking Frontend

500+ active users, 4.7⭐ rating, 99.5% crash-free sessions. 60% reduction in authentication friction. Smooth cross-platform experience.

Neobanking frontend with advanced responsive design using responsive_framework. Differentiated theming for web and mobile. Production error monitoring with Sentry. Modularization in core, resources, routing, and commons. UI/UX best practices: fixed orientation, scale control, animated transitions. Banking security with biometric authentication and encrypted storage.

FlutterGetXFirebaseGetStorageresponsive_frameworkSentry

⭐ Featured Project

TOOKANE – Multipurpose App

TOOKANE – Multipurpose App

Best practices with linter, static analysis, unit and widget tests, clear documentation and CI/CD. 30% improvement in efficiency through real data-based optimization.

Multipurpose application with Clean Architecture + MVVM + Repository Pattern. Cross-platform authentication (email, Google, Facebook), user and profile management, external API consumption and data visualization. Push notifications, offline-first support with Hive/SharedPreferences, multi-language internationalization, custom animations and transitions. CI/CD for automated deployments.

FlutterProviderRiverpodBLoCFirebaseHiveSharedPreferences

🌐 In Production

⭐ Featured Project

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Contact

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

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Fill out the form and I will respond within 24 hours with a personalized proposal.

⚡

Quick Response

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🤝

Collaboration Opportunity

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📊

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