Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I am a results-driven Senior iOS Developer with over 20 years of software development experience, including 13+ years leading both native and hybrid iOS projects using Swift, SwiftUI, UIKit, and React Native. I have a proven record of delivering enterprise-grade mobile applications across industries such as ride-hailing, logistics, retail, and enterprise services. I am passionate about technical leadership, continuous improvement, and solving real-world problems through innovation. Throughout my career, I have designed clean, scalable architectures and implemented agile practices across cross-functional teams. I have successfully scaled mobile apps to over 1 million monthly active users and boosted performance by 40% with crash-free rates exceeding 99%. I thrive on collaboration and driving customer satisfaction through high-quality, maintainable code.…I am a results-driven Senior iOS Developer with over 20 years of software development experience, including 13+ years leading both native and hybrid iOS projects using Swift, SwiftUI, UIKit, and React Native. I have a proven record of delivering enterprise-grade mobile applications across industries such as ride-hailing, logistics, retail, and enterprise services. I am passionate about technical leadership, continuous improvement, and solving real-world problems through innovation. Throughout my career, I have designed clean, scalable architectures and implemented agile practices across cross-functional teams. I have successfully scaled mobile apps to over 1 million monthly active users and boosted performance by 40% with crash-free rates exceeding 99%. I thrive on collaboration and driving customer satisfaction through high-quality, maintainable code.

Leon Parro

App Developer, Developer, Programmer, +4





I am a results-driven Senior iOS Developer with over 20 years of software development experience, including 13+ years leading both native and hybrid iOS projects using Swift, SwiftUI, UIKit, and React Native. I have a proven record of delivering enterprise-grade mobile applications across industries such as ride-hailing, logistics, retail, and enterprise services. I am passionate about technical leadership, continuous improvement, and solving real-world problems through innovation. Throughout my career, I have designed clean, scalable architectures and implemented agile practices across cross-functional teams. I have successfully scaled mobile apps to over 1 million monthly active users and boosted performance by 40% with crash-free rates exceeding 99%. I thrive on collaboration and driving customer satisfaction through high-quality, maintainable code.…I am a results-driven Senior iOS Developer with over 20 years of software development experience, including 13+ years leading both native and hybrid iOS projects using Swift, SwiftUI, UIKit, and React Native. I have a proven record of delivering enterprise-grade mobile applications across industries such as ride-hailing, logistics, retail, and enterprise services. I am passionate about technical leadership, continuous improvement, and solving real-world problems through innovation. Throughout my career, I have designed clean, scalable architectures and implemented agile practices across cross-functional teams. I have successfully scaled mobile apps to over 1 million monthly active users and boosted performance by 40% with crash-free rates exceeding 99%. I thrive on collaboration and driving customer satisfaction through high-quality, maintainable code.

Available to hire

I am a results-driven Senior iOS Developer with over 20 years of software development experience, including 13+ years leading both native and hybrid iOS projects using Swift, SwiftUI, UIKit, and React Native. I have a proven record of delivering enterprise-grade mobile applications across industries such as ride-hailing, logistics, retail, and enterprise services. I am passionate about technical leadership, continuous improvement, and solving real-world problems through innovation.

Throughout my career, I have designed clean, scalable architectures and implemented agile practices across cross-functional teams. I have successfully scaled mobile apps to over 1 million monthly active users and boosted performance by 40% with crash-free rates exceeding 99%. I thrive on collaboration and driving customer satisfaction through high-quality, maintainable code.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Mobile Developer at CommCar Inc. (Ziip)

September 30, 2023 - July 10, 2025

Led the complete iOS development lifecycle for the Ziip logistics app, streamlining courier operations across Canada and improving delivery efficiency. Integrated Google Maps and Navigation SDKs for real-time driver tracking, in-app navigation, and dynamic routing to enhance route accuracy and user experience. Refactored legacy MVC codebase to MVVM+C, modernizing the UI with SwiftUI and Swift Concurrency, significantly improving maintainability and development speed. Designed modular architecture and implemented robust API integrations, reducing network-related bugs by 70% and supporting scalable system growth. Boosted app performance with 40% faster screen transitions and achieved a 99.91% crash-free rate by collaborating closely with backend and product teams to enhance customer satisfaction.

Senior Mobile Developer – iOS at ComfortDelGro (CDG Zig)

October 1, 2023 - August 30, 2025

Spearheaded technical architecture for the CDG Zig Passenger iOS app, used by over 1 million monthly active users. Defined the technical roadmap for the Driver app, scaling to 30,000 MAU and enhancing driver engagement. Mentored and led a team of 15 iOS developers, improving development velocity by 35% by enhancing onboarding and code review standards. Built the NextGen Platform leveraging Google’s On-Demand Rides and Delivery API to improve ETA accuracy and simplify UI flows. Maintained robust CI/CD pipelines using Bitrise, automating testing and cutting release times by 50%. Collaborated with cross-functional teams to ensure technical alignment with business goals.

Senior Mobile Developer – iOS/Android at Tribal Worldwide (DDB Asia)

August 1, 2021 - August 30, 2025

Delivered mobile solutions for brands including Scoot Airlines, Samsung, and J&J, resulting in successful regional rollout. Designed scalable mobile architectures across iOS and Android platforms. Pioneered the evaluation of cross-platform tools such as Flutter and React Native, reducing development time by 25% for multi-platform apps.

Software Mobile Developer at Accenture

March 1, 2015 - August 30, 2025

Developed native iOS plugins for hybrid apps within Accenture’s global enterprise mobility platform. Provided level 3 support across teams in Malaysia and Germany, ensuring app stability and compliance. Practiced agile delivery in fast-paced project cycles with iterative user feedback.

Senior iOS Developer at Possible (VML)

December 1, 2013 - August 30, 2025

Developed custom iOS applications for SAP sales teams, improving field productivity. Coordinated with project managers and UX teams to deliver enterprise-grade app experiences. Met project milestones consistently within scope and budget.

iOS Developer at ConnectingLife

August 1, 2011 - August 30, 2025

Developed e-commerce iOS apps such as iPasarmalam and Yuu Zoo Shop. Joined as an early mobile team member contributing to core product strategy and feature planning.

Software Developer at Gemango Software Services Inc.

March 1, 2010 - August 30, 2025

Designed PC and mobile games including 3D VR cycling games for Tacx BV. Led architecture for real-time gameplay systems in a startup game studio environment.

Software Development Engineer at NCR Cebu Development Center Inc.

March 1, 2009 - August 30, 2025

Enhanced FastLane UI components for POS kiosks on embedded Windows CE systems. Built a custom 2D graphics engine (PSX) using GDI+, optimizing for mobile hardware. Completed a four-month assignment at NCR HQ in Atlanta, USA.

Senior Mobile Developer at CommCar Inc. (Ziip), Canada

October 1, 2023 - Present

Led the full iOS development lifecycle for the Ziip logistics app, streamlining courier operations across Canada and improving delivery efficiency. Integrated Google Maps and Navigation SDKs for real-time driver tracking, in-app navigation, and dynamic routing, enhancing route accuracy and user experience. Refactored legacy MVC codebase to MVVM+C, modernizing the UI with SwiftUI and Swift Concurrency, significantly improving maintainability and development speed. Designed modular architecture and implemented robust API integrations, reducing network-related bugs by 70% and supporting scalable system growth. Boosted app performance with 40% faster screen transitions and achieved a 99.91% crash-free rate, collaborating closely with backend and product teams to drive customer satisfaction.

Senior Mobile Developer – iOS at ComfortDelGro (CDG Zig), Singapore

October 1, 2023 - August 30, 2025

Spearheaded technical architecture for the CDG Zig Passenger iOS app, used by over 1 million monthly active users. Defined the technical roadmap for the Driver app, scaling to 30,000 monthly active users and enhancing driver engagement. Mentored and led a team of 15 iOS developers, improving development velocity by 35% through improved onboarding and code review standards. Built the NextGen Platform leveraging Google's On-Demand Rides and Delivery API to boost ETA accuracy and simplify UI flows. Maintained robust CI/CD pipelines using Bitrise, automating testing and cutting release times by 50%. Liaised with cross-functional teams to ensure technical alignment with business goals.

Senior Mobile Developer – iOS/Android at Tribal Worldwide (DDB Asia), Singapore

August 1, 2021 - August 30, 2025

Delivered mobile solutions for brands including Scoot Airlines, Samsung, and J&J, resulting in successful regional rollouts. Designed scalable mobile architectures across iOS and Android platforms. Pioneered evaluation of cross-platform tools (Flutter, React Native), reducing development time by 25% for multi-platform apps.

Software Mobile Developer at Accenture, Singapore

March 1, 2015 - August 30, 2025

Developed native iOS plugins for hybrid apps within Accenture’s global enterprise mobility platform. Provided L3 support across teams in Malaysia and Germany, ensuring app stability and compliance. Practiced agile delivery in fast-paced project cycles with iterative user feedback.

Senior iOS Developer at Possible (VML), Singapore

December 1, 2013 - August 30, 2025

iOS Developer at ConnectingLife, Singapore

August 1, 2011 - August 30, 2025

Developed e-commerce iOS apps such as iPasarMalaman and Yuu Zoo Shop. Joined as an early mobile team member, contributing to core product strategy and feature planning.

Software Developer at Gemango Software Services Inc., Philippines

March 1, 2010 - August 30, 2025

Designed PC and mobile games, including 3D VR cycling games for Tacx BV. Led architecture for real-time gameplay systems in a startup game studio environment.

Software Development Engineer at NCR Cebu Development Center Inc., Philippines

February 28, 2009 - August 29, 2025

Enhanced FastLane UI components for POS kiosks on embedded Windows CE systems. Built a custom 2D graphics engine (PSX) using GDI+, optimizing for mobile hardware. Completed a 4-month assignment at NCR HQ in Atlanta, USA.