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Ryan ViajedorMobile Team Lead
Portfolio

Selected work

Mobile products and engineering systems built for real users.

2021 — Present4 Featured Systems
Mobile ApplicationMobile Team Lead

Aldrees Mobile Apps

Engineered and scaled the primary consumer mobile app for one of the region's largest fuel and logistics companies. Achieved over 629K+ downloads with high user retention and seamless fuel station locator, loyalty, and fleet management features.

  • Flutter
  • Android
  • iOS
  • REST APIs
  • CI/CD
  • Fastlane
629K+Verified Downloads across App Store & Google Play
The Aldrees mobile app on a smartphone resting on a concrete surface, showing fuel station maps and reward points.
Payments / MobileMobile Engineering Lead

Mobile Payments Platform

Architected a secure, robust payment gateway integration layer for high-throughput transactional flows. Focused on PCI-DSS compliance, offline resilience, low-latency transaction processing, and multi-currency support.

  • Secure APIs
  • Payment Integration
  • Encryption
  • OAuth2
99.99%Uptime across high-volume transaction peaks
A secure mobile payment interface on a smartphone, with financial charts and encryption icons blurred behind it.
Engineering / DevOpsDevOps & Mobile Architect

Mobile Delivery Platform

Built an automated release pipeline cutting deployment times from hours to minutes. Integrated comprehensive testing suites, automated code signing, and distribution channels for rapid QA feedback loops.

  • Automated CI/CD
  • Fastlane
  • GitHub Actions
  • Bitrise
-75%Reduction in manual release overhead
An abstract visualization of continuous integration pipelines and automated deployment graphs.
ArchitectureMobile Architect / Team Lead

Cross-Platform Mobile Architecture

Designed a scalable, feature-driven clean architecture template for enterprise Flutter applications. Standardized state management, dependency injection, and modular testing guidelines across multiple cross-functional squads.

  • Scalable Flutter
  • Clean Architecture
  • Modular Design
  • State Management
100%Codebase modularity for rapid team scaling
An architectural blueprint and modular component diagram on a tablet, illustrating a scalable cross-platform codebase.
Capabilities

Tools I work with

Mobile

Flutter, Dart, Native Android (Kotlin), iOS (Swift), State Management (Bloc / Provider).

Architecture

Clean Architecture, Feature-driven modularization, Design Systems, Scalable state patterns.

Delivery

CI/CD automation, Fastlane, GitHub Actions, Bitrise, Automated Test Suites & App Store distribution.

Integrations

Secure REST & GraphQL APIs, Payment gateways, Push notifications, Analytics & Crashlytics.

Philosophy

How I build

01

Ship reliably

Every release is backed by automated tests, staged rollouts, and robust monitoring to ensure zero regression in production.

02

Automate what repeats

Eliminate human error through continuous integration, automated code signing, and streamlined deployment pipelines.

03

Design for maintainability

Write clean, modular codebases that multiple cross-functional engineering squads can easily scale and understand.

04

Build for real users

Prioritize fluid animations, offline-first resilience, and instant responsiveness over sheer feature bloat.