Senior Mobile Engineer · Colombian–Italian

Hi, I'm Cesar Ramirez

Senior Mobile Engineer (Android · iOS · Flutter)

I help companies in Europe and the Americas design, build and ship high-performance mobile apps. With dual Colombian–Italian nationality, I make it easier to collaborate with international teams and projects that need to understand both European and Latin American contexts.

Cesar Ramirez Filomena

About me

I am a Senior Mobile Engineer (Colombian–Italian) with more than 6 years of experience building mobile applications for industrial, energy, entertainment and healthcare sectors across Latin America and Europe.

My work focuses on turning complex processes into clear, reliable mobile experiences: from industrial apps with voice control and IoT to healthcare platforms for the US market and large-scale enterprise solutions in Italy.

I combine Clean Architecture, MVVM and SOLID principles with a very pragmatic mindset: writing maintainable, predictable and scalable code without losing sight of business goals (productivity, error reduction and delivery speed).

Thanks to my background between Colombia and Italy, I can collaborate with distributed teams in Europe and the Americas, understanding both the technical and cultural context of each market.

6+ Years in mobile
4 Key sectors (Industry, Energy, Entertainment, Health)
EU ↔ LATAM International experience

Tech Stack

Technologies and tools I work with

Mobile Development

Flutter Android SDK iOS UIKit SwiftUI Jetpack Compose Kotlin Swift Dart

Architecture & Core

MVVM Clean Architecture SOLID Principles Dependency Injection State Machines Coroutines

DevOps & Tooling

Git CI/CD Pipelines Jenkins Fastlane Jira Firebase GraphQL

Professional Experience

Dec 2025 - Present

Senior Mobile Developer

Publicis Sapient | Milan, Italy

Technical leadership and development of mobile applications for European enterprise clients in large-scale digital transformation projects. Design of scalable solutions in Flutter and native, integrating modern architecture and robust deployment flows.

  • Definition and implementation of modular, scalable mobile architectures (Clean Architecture, MVVM).
  • Integration of advanced authentication (biometrics, OAuth2, Firebase Auth) for enterprise ecosystems.
  • Use of AI to accelerate development workflows and optimise repetitive tasks.
  • Design of CI/CD pipelines with continuous quality and release standards for App Store and Play Store.
Jun 2024 - Nov 2025

Software Developer

KFI Technologies | Milan, Italy

Development of industrial applications focused on optimising logistics processes, operational productivity and accuracy in warehouses. Work with voice technologies, ZPL printing, IoT and industrial devices in high-performance environments.

  • Implementation of voice recognition systems for picking, enabling hands-free workflows.
  • Integration of ZPL label printing and control of industrial devices (scanners, terminals, IoT).
  • Construction of advanced state machines reducing operational errors and improving picking efficiency.
  • Development of hybrid Flutter + native Android apps with real-time communication via sockets and Telnet.
Nov 2023 - Jun 2024

Software Developer (Consultant)

HAYS | Milan, Italy

Consulting for industrial companies in northern Italy, building custom mobile applications to automate critical processes and modernise internal operational systems.

  • Development of Android and Flutter modules to automate logistics and production operations.
  • Performance improvements in existing apps through refactoring and optimisation of flows.
  • Integration with internal systems and enterprise APIs under high security standards.
Mar 2021 - Jul 2023

Mobile Developer Lead

Wiedii | Cúcuta, Colombia

Technical lead of the Android team for the main app of a US healthcare client. Responsible for architecture, quality, releases and coordination of the development team.

  • Design and maintenance of the native Android app used by thousands of users in the US.
  • Full management of the Play Store release lifecycle (QA, performance and controlled rollouts).
  • Coordination of the Agile team, defining tasks, roadmaps and technical standards.
  • Implementation of critical improvements in security, performance and user experience.

Highlighted Projects

Professional Projects

Industrial / Productivity

Vocalize

Industrial platform that uses voice technology to optimise logistics processes, reduce errors and enable hands-free workflows. Integrates ZPL label printing, industrial devices and IoT.

Flutter Android Voice Tech ZPL
Healthcare / US

MD Claim

Android app for the US healthcare sector, designed to manage procedures, schedules and clinical workflows with high standards of stability and security.

Android Kotlin Security
Healthcare / US

MD Chat

Private messaging app with end-to-end encryption, designed for secure communication of medical information and regulatory compliance.

Android Kotlin E2E Encryption

Personal Projects

Entertainment / Gamification

Partecify

Cross-platform app with interactive games, biometrics, user registration, event history and dynamic content from Firebase. Built in Flutter with modern architecture.

Flutter Firebase Gamification

Web Projects

Travel / Tourism

Vaxvi

Professional website for a travel agency, with shopping cart, online payments and a visual design focused on clarity, conversion and user experience.

WordPress UX E-commerce
Fashion / E-commerce

Occhi Atelier

E-commerce website for an Italian women’s fashion brand, with elegant design, optimised catalogue and fully functional shopping cart.

WordPress E-commerce Branding

Let’s talk

I’m available for freelance projects or technical leadership and consulting roles. Do you have an idea or need to optimise your mobile infrastructure?