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Hi, I’m Jesús Calleja. I am an iOS engineer with over six years of experience developing native iOS applications using Swift, UIKit, SwiftUI, and modern frameworks. I’m passionate about clean architecture decisions, implementing SOLID principles, and mentoring junior developers. I truly enjoy delivering high-quality solutions without compromising code integrity or app performance. Currently, I work as a Senior iOS Developer leading teams to build innovative healthcare applications. I am driven to get things done efficiently, collaborate closely with design teams, and create impactful mobile apps that enhance user experience and quality of life.…Hi, I’m Jesús Calleja. I am an iOS engineer with over six years of experience developing native iOS applications using Swift, UIKit, SwiftUI, and modern frameworks. I’m passionate about clean architecture decisions, implementing SOLID principles, and mentoring junior developers. I truly enjoy delivering high-quality solutions without compromising code integrity or app performance. Currently, I work as a Senior iOS Developer leading teams to build innovative healthcare applications. I am driven to get things done efficiently, collaborate closely with design teams, and create impactful mobile apps that enhance user experience and quality of life.

Jesús Calleja

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Hi, I’m Jesús Calleja. I am an iOS engineer with over six years of experience developing native iOS applications using Swift, UIKit, SwiftUI, and modern frameworks. I’m passionate about clean architecture decisions, implementing SOLID principles, and mentoring junior developers. I truly enjoy delivering high-quality solutions without compromising code integrity or app performance. Currently, I work as a Senior iOS Developer leading teams to build innovative healthcare applications. I am driven to get things done efficiently, collaborate closely with design teams, and create impactful mobile apps that enhance user experience and quality of life.…Hi, I’m Jesús Calleja. I am an iOS engineer with over six years of experience developing native iOS applications using Swift, UIKit, SwiftUI, and modern frameworks. I’m passionate about clean architecture decisions, implementing SOLID principles, and mentoring junior developers. I truly enjoy delivering high-quality solutions without compromising code integrity or app performance. Currently, I work as a Senior iOS Developer leading teams to build innovative healthcare applications. I am driven to get things done efficiently, collaborate closely with design teams, and create impactful mobile apps that enhance user experience and quality of life.

Available to hire

Hi, I’m Jesús Calleja. I am an iOS engineer with over six years of experience developing native iOS applications using Swift, UIKit, SwiftUI, and modern frameworks. I’m passionate about clean architecture decisions, implementing SOLID principles, and mentoring junior developers. I truly enjoy delivering high-quality solutions without compromising code integrity or app performance.
Currently, I work as a Senior iOS Developer leading teams to build innovative healthcare applications. I am driven to get things done efficiently, collaborate closely with design teams, and create impactful mobile apps that enhance user experience and quality of life.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Advanced

Spanish; Castilian

Fluent

Work Experience

Senior iOS Developer at Fisher & Paykel Healthcare

January 1, 2024 - Present

Design and implementation of a system architecture integrating the mobile app with cloud backend and BLE technology peripherals. Implemented the entire iOS codebase following clean code architecture principles using SwiftUI. Led, mentored, and supported junior mobile developers. Identified valuable features for patient quality of life through interviews and A/B testing. Coordinated design, development, and QA tasks to meet and exceed stakeholder expectations.

Software iOS Developer at Dormakaba

October 31, 2023 - July 17, 2025

Conceived, developed, and launched multiple high-quality iOS applications on the Apple Store from scratch. Spearheaded new iOS apps development for cloud-based digital twin access solutions (IoT). Managed maintenance of existing iOS applications from analysis to production deployment. Provided ongoing team support and mentored new colleagues. Developed and integrated complex systems collaborating with cloud and firmware teams. Ensured seamless end-to-end integration. Managed Apple certificates and developer account. Contributed to internal SDK development and documented BLE communication between iOS apps and hardware. Collaborated with design teams on UI/UX enhancements.

Software Android Developer at TalentoMobile

October 31, 2020 - July 17, 2025

Led development and launch of new Android applications while maintaining legacy apps. Released multiple high-quality Android apps guaranteeing defect-free user experience. Consistently met project deadlines. Developed Android applications across health, insurance, and telecommunications sectors.

Mobile Developer Intern at Holvi

June 30, 2019 - July 17, 2025

Assisted the mobility team during internship enhancing features for Holvi Android banking app. Led end-to-end development of invoice recognition via QR Codes. Gained hands-on expertise in mobile app development using Scrum methodology.