02/24/2026 updated

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Senior Android Engineer - Contractor - Freelancer

Baia Mare, Romania Master in Software Engineering
Baia Mare, Romania Master in Software Engineering

Profile attachments

Alexandru Leș CV.pdf

Java (Programming Language)Agile MethodologyAndroid Software DevelopmentApplication Performance ManagementArchitectureTest AutomationUnit TestingProgramming ToolsGithubUser Interface DesignModel View ViewModelPerformance TuningSoftware ArchitectureQuality ManagementMaterial DesignTestingFirebaseBackendGitlabGitKotlinJetpack ComposeTeam ManagementData ManagementProject DeliveryDocker
Android Development
Advanced Android development with 9 years of experience including Kotlin, Java, MVVM architecture, Jetpack Compose, and comprehensive testing frameworks

Mobile Architecture
Expert in software architecture patterns including MVVM, MVI, Clean Architecture, MVP with focus on scalable and maintainable solutions

Team Leadership
Proven leadership experience managing development teams, coordinating QA processes, and implementing agile methodologies for project delivery

Backend Integration
Proficient in Firebase, Room DB, Retrofit for seamless backend connectivity and data management

Testing Frameworks
Comprehensive testing expertise with Unit Testing, automated testing, and QA process optimization

Development Tools
Advanced usage of Git, GitHub, GitLab, Docker, and various development environments

UI/UX Implementation
Material Design implementation, ViewBinding, and user-friendly interface development

Performance Optimization
Application performance tuning, crash reduction, and stability improvements

Languages

EnglishFluentFrenchBasic knowledgeRomanianNative speakerSpanishBasic knowledge

Project history

Senior Mobile Development Lead

McDonald's Corporation
Leading Android development and QA processes for McDonald's app, reducing testing time by 55% and improving reliability by 38%

Senior Android Engineer

Porsche Digital
Developed My Porsche app for luxury automobile manufacturer, reducing unauthorized access attempts by 46% and increasing customer satisfaction by 42%

Senior Android Engineer

Leboncoin / eBay
Worked on e-Commerce apps for leading online classifieds group, filling revenue gap and increasing profit by 30% through unified auction engine development

Senior Android Engineer

Deutsche Telekom
Developed Telekom Mail app for largest telecommunications provider in Europe, increasing customer satisfaction to 92% and gaining 3x performance improvement

Senior Android Engineer (Team Lead)

Carter's OshKosh
Led development team for Point Of Sale app, ensuring 100% customer satisfaction and increasing app performance by 300% while reducing security threats to virtually 0

Senior Android Engineer (Tech Lead)

Nestle Waters
Developed e-commerce app for multinational food and drink corporation, securing 500k+ app installs and increasing monthly sales by 35%

Senior Android Engineer

Video Book Tutorials
Built app for Romanian book-trailers festival, securing 99.7% crash-free users and achieving 50% easier registration process

Senior Android Engineer

Groupon
Developed e-commerce app features for industry leader, increasing monthly sales by 15% and team productivity by 30%

Senior Android Engineer

Healthcare Company
Developed receipts reimbursement app, drastically increasing application stability from 96% to 99.8% crash-free users

Android Engineer

Bud2Bud
Developed music streaming app for online publishing company, improving app stability by 26% and ensuring app rating above 4.5 stars

Android Engineer

Fantex
Developed sports betting app for US-based financial services company, increasing PlayStore reviews to 4.45 stars and reducing execution time by 20%

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