leovido

Short-term engagement during international relocation. 3-month contract for Google Ads SDK integration and critical bug fixes.

Built and scaled the Avios loyalty rewards app for 1M+ users across British Airways Executive Club, Aer Lingus, and Vueling Club—a whitelabel React Native platform enabling members to earn and redeem points across 3 airline brands. Partnered with Product and Design to ship the biometrics login feature (Face ID/Touch ID), driving initiative from customer feedback and improving conversion rate by 40%. Led UIKit → SwiftUI → React Native migration for 50+ screens across 3 whitelabel apps, reducing codebase size by 60% and enabling 3x faster feature development through shared components. Collaborated cross-functionally with Product Managers, Designers, and Engineers across 4 Scrum teams to ship high-quality features quickly while maintaining 99.5% crash-free sessions. Integrated secure payment flows (Mastercard, 3DS2/PSD2, Apple Pay, Google Pay) with robust Keychain management. Mentored engineers on testing, CI/CD, Git, and release best practices across squads.

Built crypto wallet app with custom SDK using SwiftUI, Combine, MVVM, TDD, Swift Package Manager; implemented encryption and secure storage. Implemented advanced audio playback (AVFoundation), widgets, push notifications, and REST integrations. Developed business app integrated with Salesforce; MVVM, Combine, VoIP, CallKit, offline caching.

Provided iOS consulting and development services to companies and individual clients. Advised on software architecture, design patterns, and iOS best practices. Mentored 85+ developers in Swift, SwiftUI, Combine, and scalable system design. Earned 5/5-star rating on Codementor with 155+ mentoring sessions.

Built full-stack cloud POS system with iOS app, backend services, and payment integrations. Partnered and integrated with Star Micronics printers, Paymentsense/Dojo/EVO payments, Xero accounting, Deliverect ordering. Established TDD and Agile practices, earning 2018 Business Innovation Award. Orchestrated web/mobile backends with payments, accounting, and orders with real-time sync. Achieved ~60% code coverage across iOS and backend services.