Hi, I'm Eclesiaste Lucien

Developing and maintaining RESTful APIs and microservices architecture for enterprise web applications serving thousands of users. Implementing robust code designs following SOLID principles, Clean Architecture patterns, and Domain-Driven Design (DDD). Tech Stack: PHP 8.x, Laravel 10/11, Java 17+, Spring Boot 3.x, Spring Security, JPA/Hibernate, MySQL 8.0, PostgreSQL 14+, Redis for caching, Docker, Kubernetes for containerization. Integrating third-party APIs (payment gateways, SMS, email services), OAuth2/JWT authentication, and GraphQL endpoints. Optimizing complex database queries, implementing database indexing strategies, and reducing query execution time by 60%+. Writing comprehensive unit tests (PHPUnit, JUnit), integration tests, and end-to-end API testing. Conducting thorough code reviews, implementing CI/CD pipelines with GitHub Actions, and maintaining code coverage above 80%. Debugging production issues, monitoring application performance with APM tools, and implementing logging solutions (ELK stack). Collaborating with front-end teams using React/Vue.js, product managers, and stakeholders in Agile sprints. Deploying applications to cloud infrastructure (AWS/Azure), implementing auto-scaling, and ensuring 99.9% uptime.

Architecting and developing enterprise-level mobile applications for Android and iOS using Flutter framework, serving 50,000+ active users. Tech Stack: Flutter 3.x, Dart, Android (Kotlin/Java), iOS (Swift), Firebase, AWS services. State Management: Bloc pattern, Provider, Riverpod, GetX for complex app architectures. Architecture: MVVM, Clean Architecture, Repository pattern, Dependency Injection (GetIt, Provider). Backend Integration: RESTful APIs, GraphQL, WebSocket for real-time features, HTTP clients (Dio, http package), authentication with JWT tokens. Local Storage: Hive (NoSQL), SQLite, SharedPreferences, secure storage for sensitive data. Writing clean, maintainable code following SOLID principles, Design Patterns (Singleton, Factory, Observer), and conducting thorough code reviews. Implementing comprehensive error handling, logging (Sentry, Crashlytics), and analytics (Firebase Analytics, Mixpanel). Debugging complex production issues, performance profiling with Flutter DevTools, optimizing app startup time and reducing memory footprint by 40%. Implementing automated testing (Unit tests, Widget tests, Integration tests), achieving 75%+ code coverage. Collaborating with UX/UI designers, backend developers, QA teams, and product owners in Agile sprints. Successfully delivered 3 major mobile applications from concept to production deployment.

Specializing in full-cycle Flutter mobile app development from conceptualization to App Store and Play Store deployment with successful releases serving thousands of active users. Core Technologies: Flutter 3.x, Dart 3.x, Android Studio, Xcode, VS Code. Advanced State Management: Bloc pattern with Bloc library, MobX for reactive programming, Provider for dependency injection, Riverpod for advanced state management. Architecture Patterns: MVVM (Model-View-ViewModel), Clean Architecture with feature modules, Repository pattern, Service Locator pattern (GetIt). Data Management: Hive database for local NoSQL storage, SQLite with sqflite package, SharedPreferences, secure storage implementation, offline-first architecture with sync mechanisms. Backend Integration: RESTful API integration with Dio HTTP client, GraphQL queries/mutations, WebSocket for real-time communication, OAuth2/OIDC authentication, token refresh mechanisms. UI/UX: Custom widgets, animations with Flutter Animation API, Material Design 3, Cupertino design, responsive layouts, dark mode support, accessibility features (a11y). Performance Optimization: Code splitting, lazy loading, image optimization, caching strategies, memory leak prevention, battery optimization, reducing app size by 35%. Testing & Quality: Unit testing with Mockito, Widget testing, Integration testing, Golden tests, Test-driven development (TDD), code coverage tools. Deployment: App Store and Play Store submission, version management, release notes, beta testing (TestFlight, Firebase App Distribution), CI/CD with GitHub Actions/Codemagic. Successfully deployed 5+ production apps with excellent user ratings (4.5+ stars), maintaining code quality through automated testing and code reviews.

Leading end-to-end development of custom web and mobile applications for diverse clients across multiple industries. Front-end: HTML5, CSS3, Sass/SCSS, JavaScript (ES6+), TypeScript, React 18+, Next.js 13+, Vue.js 3, Tailwind CSS, Material-UI, responsive design, PWA development. Back-end: PHP 8.x, Laravel 10+, Node.js, Express.js, RESTful API design, GraphQL, MySQL, PostgreSQL, MongoDB. Mobile: Flutter 3.x, Dart, Android Studio, Xcode, cross-platform development, native modules integration. Tools & Practices: Git/GitHub, GitLab, Docker, Docker Compose, CI/CD (GitHub Actions, GitLab CI), Jest, Cypress, Postman, Swagger/OpenAPI. Managing full project lifecycle from requirement gathering, system architecture design, database modeling, development, testing, deployment (AWS, Vercel, Netlify), and maintenance. Implementing payment integrations (Stripe, PayPal), authentication (OAuth2, JWT), real-time features (WebSockets, Socket.io), and third-party service integrations. Applying Agile/Scrum methodologies, managing client relationships, conducting sprint planning, daily standups, and retrospective meetings. Delivered 15+ production applications on time and within budget, achieving 95%+ client satisfaction rate.