Julio Inzunza

Results-driven Senior Android Developer with over 13 years of full software lifecycle experience, specializing in modern Android development using Kotlin, Jetpack Compose, Clean Architecture and MVVM architecture. Proven track record of architecting scalable mobile solutions across retail, fintech (EMV/POS) and enterprise sectors including payroll, invoicing, hospitality, accounting and POS gas station systems. Adept at integrating cutting-edge technologies, including on-device AI/LLMs and real-time WebSockets, to deliver high-performance, resilient applications.

Certified Scrum

Master (CSM) committed to driving Agile best practices and cross-functional team success.

Mobile Android Developer at Lumston (2025-07 – Present)

• Engineered an innovative inventory management application that uses voice recognition and WebSocket connections to AWS Nova Sonic, reducing manual data entry time.
• Architected modern UI components using Jetpack Compose and implemented robust MVVM architecture with Hilt for dependency injection, significantly enhancing application scalability and maintainability.
• Integrated on-device AI capabilities using Google AI Edge's LiteRT-LM API, leveraging the FunctionGemma model to automate and trigger Room DB local operations, improving offline functionality.
• Optimized local data persistence and network calls using, Clean Architecture, Coroutines (mainly structured concurrency), Flows, Room, DataStore and Retrofit, ensuring seamless, real-time synchronization with RESTful web services.

Mobile Android Developer at Atos - Eviden (2021-10 – 2025-04)

• Developed and deployed secure Android applications for EMV point-of-sale (POS) terminals, successfully processing high volumes of EMV and Contactless (CLESS) transactions for the retail sector.
• Implemented complex hardware-to-software communications, establishing highly stable USB, Bluetooth serial, and TCP/IP (Client/Server) connections via external libraries.
• Strengthened application security by generating and configuring SSL certificates, ensuring encrypted terminal-to-server data transmission.
• Designed a dynamic receipt printing module with customizable messaging and tag-based parsing, elevating the end-user retail experience and reducing printing errors.

Developer and Analyst at I-Gas Mexico (2017-01 – 2021-10)

• Engineered a Point-of-Sale (POS) Android application for tablets using Kotlin and SQLite, streamlining gas station operations. Enabled end-to-end transaction processing (sales, invoicing, and ticket printing), improving checkout efficiency.
• Architected real-time data synchronization by implementing Clean Architecture, MVVM, Coroutines, socket-based communication and JSON serialization to seamlessly integrate the POS app with backend .NET services, processing transactions daily with zero data loss.
• Spearheaded the reengineering of legacy backend services for volumetric control and sales invoicing. Upgraded system architecture using .NET, RESTful APIs, and XML serialization, enhancing system stability and reducing processing time.
• Optimized and maintained mission-critical databases and administrative systems (invoicing and volumetric tracking) utilizing Object Pascal and Firebird DB. Resolved system bugs and deployed new features, reducing system downtime across active gas stations.

Developer and Analyst at Imagen y Sistemas Computacionales (2013-01 – 2016-12)

• Engineered a native Android application using Kotlin and SQLite for sales management. Implemented Socket technology for seamless communication with .NET services via JSON serialization, improving point-of-sale efficiency through Printer API integration.
• Engineered an automated Windows Service for XML file certification, integrating with authorized third-party services via SOAP and RESTful APIs. Streamlined request handling utilizing socket connections, XML serialization, and SQL databases, reducing certification processing time.
• Developed and deployed key modules for electronic payroll and accounting systems utilizing Object Pascal and Firebird DB. Implemented secure socket communications and XML data serialization, ensuring 100% accuracy in financial reporting for active clients.
• Maintained and scaled a diverse suite of enterprise applications (including administrative ERP, invoicing, payroll, and hospitality management systems). Leveraged Object Pascal and Firebird DB to deliver continuous system upgrades and bug fixes, improving overall system performance and supporting daily users requests.

Computer Science Degree in Computer Science – Instituto Tecnologico de Los Mochis