Senior Mobile Engineer

Hi, I'm CARLOS.

Flutter · iOS · Android

With over 5 years of experience in mobile development, I specialize in creating cross-platform applications that combine elegant design with exceptional functionality.

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Experience

Jul 2025 - Present 1 yr 1 mo

Senior Mobile Engineer

Lynx Labs

Contributing to the development of a React Native fintech application, with ownership over key UX patterns in the onboarding and account-creation flows, while collaborating closely with the team on shared components, transfers functionality, and code quality.

Feature Development
- Defined and implemented a wizard-based UI pattern for the onboarding and account-creation flows (savings and checking accounts), replacing a multi-screen approach to improve flow consistency and maintainability.
- Advocated for and contributed to the consolidation of shared layouts and components across onboarding and account-creation flows, resulting in a unified UI now used across both.
- Contributed to the transfers module, implementing UI screens and supporting components within the transfer flow.
Collaboration & Quality
- Reviewed 5-10 pull requests weekly, helping maintain code quality and consistency across the team.
- Contributed to expanding the app's English/Spanish localization files, supporting a bilingual user base.

React NativeReduxExpoFigmaGithub

Aug 2024 - Jun 2025 10 mos

Senior Software Engineer

Contollo Consulting Contract

Acted as tech lead across multiple mobile products, combining architecture decisions, team mentorship, and hands-on development in React Native and Flutter — from leading legacy modernization efforts to building CI/CD pipelines from scratch.

Technical Leadership
- Led a team of 2 mobile developers as tech lead for a React Native fundraising application, defining the architecture and design pattern for the app.
- Conducted code reviews and QA on team deliverables, enforcing best practices and mentoring developers on the codebase.
- ntroduced linting rules and a formal branch merging strategy to standardize development workflows across the team.
Legacy Modernization
- Led the migration of a legacy real estate broker management app from Flutter 2.x to Flutter 3, enabling compatibility with newer Apple devices, as the sole Flutter developer on the team at the time.
- Migrated outdated dependencies and libraries, refactored redundant code blocks, and identified technical risk areas within a previously undocumented, unfamiliar codebase.
CI/CD & Deployment
- Migrated an existing Flutter project's CI/CD pipeline to a newer Flutter version, ensuring continued compatibility with build tooling.
- Built an automated build pipeline from scratch for a second project using GitHub Actions.
Cross-functional Delivery
- Translated Figma designs into production-ready FlutterFlow interfaces for a recreational vehicle (RV) inspection tool, including API integration and state management.
- Implemented camera and barcode/QR scanner functionality within the inspection workflow.

FlutterReact NativeFlutterFlowCodeMagicGithubApp DistributionBLoCRedux

Jun 2021 - Aug 2024 3 yrs 2 mo

Mobile Developer

Hello Iconic

Over 3+ years, progressed from contributing to an internal React Native whitelabel platform for fintech products to building core features and the design system for a production Flutter investment application — growing from mid-level to senior engineer along the way, with strong ownership over UI architecture, third-party integrations, and app stability.

Feature Development — Investment App
- Developed core features for a production Flutter investment application using BLoC, including beneficiary management flows and payment gateway optimizations.
- Contributed to the integration of fraud detection capabilities within the payment flow to improve transaction security.
- Onboarded onto and contributed to an existing, previously delivered codebase, becoming a key contributor as the project matured — experience that was foundational in my growth to a senior engineering role.
- Built and maintained the application's design system, creating reusable Flutter UI components and translating Figma designs into production-ready interfaces.
Internal Tooling — Whitelabel Platform
- Contributed to an internal React Native whitelabel platform for fintech products, building scripts and modular features designed for future reuse across multiple client products.
Reliability & Third-Party Integrations
- Integrated Firebase services (Authentication, Firestore, Remote Config, Analytics, Crashlytics) across multiple apps to support data handling, configuration, and reliability.
- Used Crashlytics and Analytics to identify and resolve stability issues quickly, contributing to improved App Store and Google Play ratings.
Release Management
- Managed manual Android and iOS builds and store releases, including App Store and Google Play submission processes.

FlutterReact NativeFirebaseBLoCReduxClean ArchitectureApp Distribution

Jan 2021 - Apr 2021 3 mos

Flutter Developer

FREELANCE

Delivered Flutter-based features for a media-focused application, working directly with backend services and real-time functionality.

Implemented QR code scanning and API-driven list views in Flutter.
Integrated Firebase Authentication for secure user access.
Built live video playback functionality for real-time streaming content.

FlutterFirebasePostgreSQL

Professional Skills

The tools and platforms I use to ship production mobile apps.

Core Stack

Flutter & Dart iOS

Android

Firebase

Supabase

React Native

Tools & Workflow

CI/CD & Build

GitHub Actions

Codemagic

Azure DevOps Fastlane

Development Tools

Visual Studio Code

Cursor

Xcode

Android Studio

Version Control

GitHub & Git

Tools & Collaboration

Slack Jira Microsoft Teams

Linear

Featured Projects

Beta

Hay Vara? - Expense Tracker

Offline-first expense tracking across iOS, Android, and Web — built from a single Flutter codebase.

A cross-platform Flutter expense tracker with offline-first data and Clean Architecture — built as a production side project with a co-founder.

Cross-platform

Dart Flutter Dart Frog Render Firebase Auth go_router

VIEW PROJECT GitHub

Beta

QR Membership Mobile Client

Mobile membership access via periodically-regenerating QR codes, with role-based flows for clients and employees.

A personal project exploring QR-based membership validation — a Flutter client for clients and employees, with a planned Dart Frog backend to generate and validate time-based QR codes.

iOS Android

Dart Flutter Dart Frog (planned) Firebase Auth

VIEW PROJECT GitHub

Let's build something great.

I'm currently looking for new opportunities. Whether you have a question or just want to say hi, I'll try my best to get back to you!

Email me

cgcascovalle@gmail.com

Location

Remote (GMT-6)

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