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I have developed apps from the ground up, led and been part of multiple teams, and ensured I inspire learning and creative thinking within the team and workplace. With years of experience in software development, project management, and AI-driven innovation, I enjoy mentoring junior developers and helping non-technical stakeholders understand the implementation trade-offs and potentials in practical business use cases.…I have developed apps from the ground up, led and been part of multiple teams, and ensured I inspire learning and creative thinking within the team and workplace. With years of experience in software development, project management, and AI-driven innovation, I enjoy mentoring junior developers and helping non-technical stakeholders understand the implementation trade-offs and potentials in practical business use cases.

John Ernest Guadalupe

App Developer, Web Developer, Project Manager

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I have developed apps from the ground up, led and been part of multiple teams, and ensured I inspire learning and creative thinking within the team and workplace. With years of experience in software development, project management, and AI-driven innovation, I enjoy mentoring junior developers and helping non-technical stakeholders understand the implementation trade-offs and potentials in practical business use cases.…I have developed apps from the ground up, led and been part of multiple teams, and ensured I inspire learning and creative thinking within the team and workplace. With years of experience in software development, project management, and AI-driven innovation, I enjoy mentoring junior developers and helping non-technical stakeholders understand the implementation trade-offs and potentials in practical business use cases.

Available to hire

I have developed apps from the ground up, led and been part of multiple teams, and ensured I inspire learning and creative thinking within the team and workplace. With years of experience in software development, project management, and AI-driven innovation, I enjoy mentoring junior developers and helping non-technical stakeholders understand the implementation trade-offs and potentials in practical business use cases.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Associate Manager at Ernst & Young GDS Philippines

January 1, 2020 - Present

Designed and developed client-tailored applications collaborating with architects and project managers on solution design and architecture planning. Provided end-to-end consultancy including issue resolution and project oversight. Led a team building a native Android podcast app, overseeing feature delivery, code reviews, and mentoring juniors. Built new features for a medical e-doctor app on Android and iOS, implementing secure teleconsultation and appointment scheduling. Developed an NFT/blockchain-based wallet for logistics and supply chain certification supporting mobile and web. Actively participated in Scrum meetings and sprint planning, offering valuable technical input to refine deliverables and timelines.

Senior Mobile Developer at Navitaire (via NTT Data PH)

January 1, 2020 - August 27, 2025

Enhanced Cebu Pacific's Mobile App by developing new features improving customer booking flexibility such as CEB Flexi. Played a key role in bug maintenance and performance optimization ensuring seamless UX across Android and iOS. Actively participated in Agile processes providing technical insights and solutions. Developed and maintained cross-platform mobile applications using Xamarin C#, delivering high-performance and maintainable code.

Senior Android Developer at Innovotek Apps Inc.

November 1, 2018 - August 27, 2025

Led a developer team rebuilding the company’s flagship app from the ground up implementing modern frameworks and best practices for improved performance and maintainability. Collaborated closely with CEO and CTO to define app architecture and technical strategy aligning with business goals. Oversaw feature development and bug fixes using JIRA sprint boards to manage tasks and ensure timely delivery. Mentored junior developers by conducting code reviews and training sessions. Implemented reactive programming accelerating development cycles and ensuring high-quality builds. Spearheaded integration of third-party services such as Firebase and PubNub optimizing performance and scalability.

Senior Android Developer at Samsung Mobile R&D Philippines

November 1, 2016 - August 27, 2025

Mentored and tutored junior developers especially on automated testing ensuring best practices and improving code quality. Led development of a Test Automation Framework using Espresso enhancing efficiency and streamlining testing processes. Collaborated with team members to maintain and improve assigned applications implementing optimizations to enhance performance and reliability. Actively resolved critical issues including debugging and troubleshooting ensuring seamless user experience and system stability.

Software Engineer II at KLab Cyscorpions INC.

January 1, 2016 - August 27, 2025

Advanced from beginner to key contributor leading application upgrades and serving as lead code reviewer for sprints. Developed test automation frameworks using Robotium and Spoon and mentored junior programmers to enhance their skills. This experience shaped ability to learn rapidly, adapt to challenges, and deliver impactful results.

Senior IT Consultant at Upwork.com / Toptal.com

January 1, 2013 - Present

Led and managed up to 20 developers in largest projects balancing high-pressure deadlines in fast-paced startup environments. Took full ownership of projects from contract management, resource sourcing, project planning, and execution to launch and ongoing maintenance. Guided clients through entire software development lifecycle ensuring smooth transitions from ideation to MVP, scaling, and long-term sustainability. Designed and developed applications across various technologies creating reusable frameworks accelerating development and improving maintainability. Implemented modular and test automation-ready MVPs ensuring flexibility and future scalability. Recruited, trained, and mentored outsourced development teams overseeing milestones, schedules, and estimations for timely delivery. Facilitated clear client communication providing regular updates, technical insights, and product demonstrations aligning expectations and ensuring satisfaction.