Work Preference
Summary
Overview
Work History
Education
Skills
Languages
Timeline
Angel Alejandro Garcia Rivera
Open To Work

Angel Alejandro Garcia Rivera

Denver,CO

Work Preference

Job Search Status

Open to work
Desired start date: 2 weeks notice

Desired Job Title

Mobile Engineer (Xamarin / .NET)Software Engineer IISoftware Engineer (APIs & Microservices)Software EngineerSoftware Analyst & Fullstack Developer

Work Type

Full TimeContract Work

Location Preference

On-SiteRemoteHybrid
Location: Denver, COColorado Springs, COBroomfield, COBoulder, COArvada, CO
Open to relocation: Yes

Salary Range

100000/yr - 200000/yr

Important To Me

Career advancementWork-life balanceCompany CulturePersonal development programsPaid time off401k match

Summary

Senior Full Stack Engineer with 12+ years of experience specializing in .NET and Angular within Telecommunications and Fintech. Expert in Microfrontend architecture and leading large-scale migrations from legacy systems to modern, scalable platforms. Proven track record in building secure GraphQL/REST APIs and high-performance mobile solutions using Ionic and Xamarin. Dedicated to driving engineering excellence through SOLID principles, accessibility (a11y), and mentor-led team growth

Overview

12
12
years of professional experience

Work History

Senior Software Engineer III

Charter Communications, Spectrum
Denver, CO
12.2022 - Current
  • Architected and evolved micro frontend platform within a monorepo, increasing team autonomy and scalability across multiple product domains
  • Led full stack migration from Xamarin (.NET) to Angular + Ionic, redesigning the frontend while preserving and extending existing .NET backend services
  • Built secure OTP authentication component (Angular + .NET backend) used across critical user operation flows, reducing vulnerability surface
  • Partnered with backend engineers to design RESTful .NET service integrations, ensuring type-safe, performant data exchange between Angular SPAs and APIs
  • Delivered WCAG accessibility improvements and multilingual (i18n) features, expanding platform reach across diverse user groups
  • Drove cross-functional architecture reviews; authored technical design documents and ADRs to standardize engineering practices

Mobile Full Stack Engineer

Aptivist
Atlanta, Georgia
07.2022 - 12.2022
  • Developed native iOS features using Xamarin.iOS (C#/.NET), improving app performance and UX for a social-impact mobile platform
  • Built and integrated secure REST APIs (.NET) enabling reliable in-app messaging and push notification services
  • Established CI/CD pipelines via App Center, enabling consistent automated deployments to iOS and Android
  • Applied MVVM architecture and component-driven design to improve code reuse and maintainability

Software Engineer II

SharpSpring (Constant Contact)
Gainesville, Florida
07.2021 - 07.2022
  • Designed and implemented scalable APIs using GraphQL and gRPC, improving data efficiency across distributed marketing platform services
  • Built dynamic, component-based Angular features, delivering high-performance responsive user experiences across the SaaS product
  • Integrated third-party APIs (Shopify), enabling seamless ecommerce data synchronization with the platform
  • Leveraged AWS Lambda, S3, and Elasticsearch to improve system scalability, performance, and search reliability

Backend Engineer — APIs & Microservices

Coca-Cola (Telynet)
Monterrey, Nuevo León, México
06.2020 - 07.2021
  • Designed scalable microservices and RESTful APIs for order management and logistics workflows across high-availability distribution systems
  • Implemented real-time event-driven notification systems, improving operational visibility for logistics teams
  • Deployed and maintained services using GitLab CI/CD pipelines, improving release cadence and deployment reliability

Full Stack Developer - .NET / Angular / Azure

Sigma Alimentos (Telynet)
Monterrey, Nuevo Leon, Mexico
09.2019 - 06.2020
  • Designed RESTful APIs within a .NET microservices architecture, supporting reliable enterprise data workflows
  • Built reusable Angular components and feature modules ensuring consistency and scalability across the application
  • Managed and optimized SQL Server schemas and queries, improving API response times and data integrity
  • Deployed applications to QA and Production using Azure DevOps pipelines, ensuring high-quality releases

Software Analyst & Fullstack Developer

Banregio
Monterrey, Nuevo Leon, Mexico
11.2018 - 09.2019
  • Developed backend microservices supporting scalable, maintainable banking enterprise applications
  • Built Angular-based UIs aligned to business requirements, delivering responsive user-friendly banking interfaces
  • Implemented ETL pipelines using Apache NiFi for secure and efficient cross-system data migration

Full Stack Developer — .NET Backend & Angular

Simpplo
Monterrey, Nuevo Leon, Mexico
01.2018 - 11.2018
  • Designed and built .NET (C#) backend services and RESTful APIs powering Angular frontends and external platform integrations
  • Implemented secure payment processing flows with OAuth2 authentication and industry security best practices
  • Led end-to-end development from requirements gathering through production deployment in an Agile/Scrum environment

Cross-platform Engineer

Dstribuy (Freelance)
Monterrey, Nuevo Leon, Mexico
01.2017 - 10.2018
  • Built cross-platform iOS/Android mobile apps using Xamarin Forms (.NET/C#) with GPS geolocation and delivery zone optimization
  • Integrated REST APIs for real-time data sync between mobile clients and backend systems

Xamarin / .NET Developer

Prograf
Ciudad Victoria, Tamaulipas, Mexico
08.2016 - 12.2017
  • Developed cross-platform mobile applications in Xamarin (C#/.NET) integrated with REST API backends
  • Built custom XAML UI components for tablet and iPad interfaces; implemented SQLite for offline data persistence

Web Developer

Carandcar.es (Freelance)
Madrid, Madrid, Spain
01.2014 - 08.2016
  • Rebuilt and optimized company website, improving performance and UX using HTML, CSS, JavaScript, and jQuery
  • Implemented backend functionality and optimized database queries, reducing API response times

Education

M.D. - Information Technology Engineer

Universidad De La Rioja, México
03-2023
  • Awarded "Mención Honorífica" (Equivalent to Magna Cum Laude) for academic excellence.

Skills

Frontend: Angular, Ionic, TypeScript, JavaScript, HTML5, CSS3, Sass, NgRx
Mobile: Ionic, Capacitor, Xamarin (iOS/Android), MAUI
Backend: NET / C#,Nodejs, PHP (Laravel), Python, Java (Spring Boot), REST, GraphQL, gRPC
Architecture: Microfrontends, Microservices, Monorepos
Cloud & DevOps: AWS, Azure, CI/CD (GitLab, Azure DevOps), App Center
Testing: Jasmine, Cucumber, NUnit, Selenium, Appium
Databases: PostgreSQL, MySQL, SQL Server, Firebase, SQLite
Tools: Git, Jira, Confluence, Agile/Scrum

Languages

English
Professional
Spanish
Native/ Bilingual

Timeline

Senior Software Engineer III - Charter Communications, Spectrum
12.2022 - Current
Mobile Full Stack Engineer - Aptivist
07.2022 - 12.2022
Software Engineer II - SharpSpring (Constant Contact)
07.2021 - 07.2022
Backend Engineer — APIs & Microservices - Coca-Cola (Telynet)
06.2020 - 07.2021
Full Stack Developer - .NET / Angular / Azure - Sigma Alimentos (Telynet)
09.2019 - 06.2020
Software Analyst & Fullstack Developer - Banregio
11.2018 - 09.2019
Full Stack Developer — .NET Backend & Angular - Simpplo
01.2018 - 11.2018
Cross-platform Engineer - Dstribuy (Freelance)
01.2017 - 10.2018
Xamarin / .NET Developer - Prograf
08.2016 - 12.2017
Web Developer - Carandcar.es (Freelance)
01.2014 - 08.2016
Universidad De La Rioja - M.D., Information Technology Engineer
Angel Alejandro Garcia Rivera