# Efrain Vega

> Lead Mobile Engineer

Location: Parker, Colorado, United States
Profile: https://flows.cv/efrain

- 14 years professional software development experience, 9 years in mobile, 6 years as team lead
- Experience as a Mobile Developer Android/iOS (Xamarin & Native), .Net FullStack, DevOps, and SDK Engineer
- Primary development languages: C#, Java, Kotlin
- Supported languages: Dart, C, Python, Lua, JavaScript, TypeScript, Java, Haxe, SQL, C++
- Operating Systems & Frameworks: Android, iOS, Flutter, Xamarin, Windows, Unity, Monogame
- DevOps Experience: Gitlab-CI, TeamCity, Jenkins, Azure DevOp, Github, AWS
- Development-Cycle: Agile, Scrum, Kanban
- Version Control: Primarily Git & Gitflow. TFS, SVN
- Lead Experience: training, story grooming, work assignment, release planning, leading sprint ceremonies, architectural/pattern design & team dissemination

## Work Experience
### Senior Staff Engineer (Team Lead) @ Merlyn Mind
Jan 2022 – Jan 2023 | New York, New York, United States
- Android Native Development in Kotlin. C++ hardware libraries. Support JS with Web & Chromebook apps
- Work on Android Operating system for four hardware SKUs
- Project proposal, planning, tasking, and Proof Of Concept pitching
- Train and work with a team to adopt Scrum. Create documentation and training plans for new products
Interview, hire, and train engineers across the world for 24 hour coverage

### Independent Software Contractor @ Independent Contracts
Jan 2010 – Jan 2022 | Parker, Colorado, United States
● Primarily .Net and C# Development with SQL, C++
● WCF, WPF, ADO.net, and Mono/Xamarin Framework
● ESB/Biztalk, WCF/ASMX, XML/NIEM government web services
● Data transaction and translation. XML, SQL, and file
● Tools development for Network and IT support teams
● Automation/Systems programming for mutli-domain and operating system maintenance
● SQL Server scripting, optimization, and maintenance
● CJIS FBI Clearance and Government encryption protocols
● PCL development, Xamarin/Android Programming

### Lead Android Engineer @ DHI Group, Inc.
Jan 2019 – Jan 2022 | Greater Denver Area
- Android Native development in Kotlin & Java using Jetpack. Some iOS with Swift
- Android Lead for mobile division including: Training, staffing, running ceremonies, and architectural design
- Prototyping, rapid iteration, and finalization of front end designs

### Lead Mobile Engineer @ Toastmasters International
Jan 2019 – Jan 2019 | Greater Denver Area
● Lead a team of web & mobile developers
● Lead Duties: Scheduling, Interviews, Reviews, Training, and Advisory
● Primarily .Net and C# Development. Android and iOS native UI. JS/ASP.Net for web full stack
● Setup CI/CD, Maintain Scrum Board, Manage Devices
● Create designs, do user testing, manage internationalization & accessibility efforts
● Platform architecture design, tasking, research and development
● Conduct Interviews for Software Engineers for Charter Xamarin Developers

### Lead Mobile Engineer @ Charter
Jan 2017 – Jan 2019 | Denver
Hired on from previous contractor position:
● Primarily .Net and C# Development. Android and iOS native UI.
● Core SDK redesign and development for cross platform applications
● JSON, REST API use
● Contiguous Integration set up for android and iOS apps. Visual Studio Team Services, Jenkins, Gitlab-Runner
● Platform architecture design, tasking, research and development
● Conduct Interviews for Software Engineers for Charter Xamarin Developers

### Senior Software Engineer @ Unison Systems Inc
Jan 2017 – Jan 2017 | Denver
Consultant for Charter Communications: 
● Primarily .Net and C# Development. Android and iOS native UI.
● Core SDK redesign and development for cross platform applications
● JSON, REST API use
● Contiguous Integration set up for android and iOS apps. Visual Studio Team Services, Jenkins, Gitlab-Runner
● Platform architecture design, tasking, research and development
● Conduct Interviews for Software Engineers for Charter Xamarin Developers

Other Duties: 
● Conduct Interviews for Software Engineers at Unison Systems
● MatchJob Requirements with applicants

### SDK Software Engineer @ Absio Corporation
Jan 2015 – Jan 2016 | Denver, Colorado
● Primarily .Net and C# Development with parts SQL, C++, JS, & Python
● Cryptographic systems design and implementation
● SDK design and development for internal teams and external clients
● JSON, REST web service development and consumption
● Automated build tools development for Obfuscation, Code Signing, Packaged Installers
● Platform architecture design, tasking, research and development
● PCL, Xamarin/Android Programming, partial Xamarin/Mac and Xamarin/iOS
● Async, threading, and runtime optimizations

### Analyst/Programmer III/IV (System Programmer) @ State of Alaska
Jan 2013 – Jan 2015 | Department of Public Safety
●	Primarily .Net and C# Development with SQL, C++
●	WCF, WPF, ADO.net, and Mono Framework
●	ESB/Biztalk, WCF/ASMX, XML/NIEM government web services
●	Data transaction and translation. XML, SQL, and file.
●	Tools development for Network and IT support teams
●	Automation/Systems programming for mutli-domain and operating system maintenance.
●	SQL Server scripting, optimization, and maintenance 
●	CJIS FBI Clearance and Government encryption protocols
●	Xamarin Android/iOS/WP8 Programming

### System Administrator - DevOps @ GCI - General Communications Inc.
Jan 2013 – Jan 2013
● Contract Programming in C#, C++, Lua integration, and SQL
● Website coding in: HTML, CSS, JavaScript, PHP, and ASP.net
● Active Directory and Exchange setup/take down
● IT consulting on Networks, Hosting, and Server-side Software
● Clients Include: Croix d'Or Consulting, Kenneth Kirk: Attorney & Counselor at Law, United State
Airforce, and Ciri Native Corp

### Application Support Team Lead @ Glacier Bear LLC
Jan 2011 – Jan 2013
● C#, C++, Bash, and SQL debugging, scripting, and application integration
● IT Automation & Tools development
● Linux operating systems and distributions. Bash, Vi, and Samba fundamentals.
● Software as a service, 'cloud' infrastructure, and systems administration experience. Including
programs/systems such as PFSense, KVM, VMWare, HyperV, NetApp, and Syncrify
● Mail Security experience, including: Postini, MimeCast, and Office 365
● Educating, creating documentation, and leading meetings for end users and non-technical
management
● Managing project time-lines and assignment of work.


## Education
### Bachelor of Science (B.S.) in Computer Science & Philosophy
University of Alaska Anchorage
Jan 2009 – Jan 2018


## Contact & Social
- LinkedIn: https://linkedin.com/in/efrain-vega-5b2ab661

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Source: https://flows.cv/efrain
JSON Resume: https://flows.cv/efrain/resume.json
Last updated: 2026-03-22