Mobile Architecture & Modernization
I help teams review, redesign and evolve Android, iOS and Flutter apps with scalable architecture and pragmatic technical decisions.
Senior Mobile Engineer · Tech Lead · Colombian–Italian
Hi, I'm Cesar Ramirez. I turn mobile ideas into reliable products.
Android · iOS · Flutter · Mobile architecture
I help companies move from product needs to production-ready mobile solutions through hands-on engineering, clear technical direction and dependable delivery.
8
years building mobile apps
Lead
tech & team guidance
EU/LATAM
international delivery
About me
I am a Senior Mobile Engineer and Tech Lead with 8 years of experience turning ideas and business needs into mobile products for industrial, entertainment, healthcare and enterprise environments.
My work focuses on moving products from definition to production: turning ambiguous requirements and complex systems into clear mobile experiences, aligned teams and stable releases.
I combine Clean Architecture, MVVM and SOLID principles with a pragmatic mindset: code should be maintainable, predictable and useful to the business.
Based in Milan with Colombian and Italian background, I work comfortably with distributed teams across Europe and the Americas.
8
Years in mobile
4
Key sectors (Industry, Energy, Entertainment, Health)
EU ↔ LATAM
International experience
How I can help
From early product definition to production releases, I help teams build, consolidate and evolve reliable mobile products.
Tech Lead & Team Enablement
I support mobile teams with technical alignment, code quality, delivery standards, mentoring and cross-functional collaboration.
Native & Flutter Delivery
I contribute hands-on to product development, integrations, release flows and production-ready mobile features.
Core Mobile Expertise
The core capabilities I use to build reliable mobile products and guide them to production.
Mobile Product Engineering
Architecture & Reliability
Delivery & Integrations
I use AI as an accelerator for analysis, documentation, testing and repetitive tasks, with technical review and engineering judgment applied before delivery.
Professional Experience
Dec 2025 - Present
Senior Mobile Developer · Tech Lead / Team Lead functions
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.
- Code review, technical mentoring and coordination with product, design and backend stakeholders.
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.
Dec 2018 - Feb 2021
Freelance Mobile Developer
Independent | Colombia / Remote
Began my professional path after graduating from university, working directly with clients to transform early product ideas into functional Android applications.
- Identified client needs and translated them into clear requirements and achievable project scopes.
- Designed and developed Android applications and features for different business needs.
- Managed testing, delivery preparation and iterative improvements based on client feedback.
- Took responsibility for projects from initial idea through implementation and final delivery.
Highlighted Projects
Professional Projects
Public products and platforms I contributed to as part of company teams or consulting engagements.
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
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 open to senior mobile roles and consulting projects where I can turn product needs into reliable mobile solutions, strengthen delivery and guide teams through technical decisions.