I am a dynamic iOS and Mac application developer with over 15 years of experience designing, developing, and deploying native iOS apps. I have led cross-functional teams ranging from 2 to 40 members, and I actively advocate Agile/Scrum practices to ensure efficient project delivery. I thrive in security-conscious environments and enjoy turning complex requirements into robust, user-friendly solutions. My technical toolkit spans Objective-C, Swift, SwiftUI, Core Data, ARKit, SceneKit, and more, with hands-on experience in CloudKit, OAuth, and secure data handling. I focus on performance, code quality, and a great user experience, delivering scalable apps and mentoring teams to adopt best practices across the development lifecycle.

Denis Arsenault

I am a dynamic iOS and Mac application developer with over 15 years of experience designing, developing, and deploying native iOS apps. I have led cross-functional teams ranging from 2 to 40 members, and I actively advocate Agile/Scrum practices to ensure efficient project delivery. I thrive in security-conscious environments and enjoy turning complex requirements into robust, user-friendly solutions. My technical toolkit spans Objective-C, Swift, SwiftUI, Core Data, ARKit, SceneKit, and more, with hands-on experience in CloudKit, OAuth, and secure data handling. I focus on performance, code quality, and a great user experience, delivering scalable apps and mentoring teams to adopt best practices across the development lifecycle.

Available to hire

I am a dynamic iOS and Mac application developer with over 15 years of experience designing, developing, and deploying native iOS apps. I have led cross-functional teams ranging from 2 to 40 members, and I actively advocate Agile/Scrum practices to ensure efficient project delivery. I thrive in security-conscious environments and enjoy turning complex requirements into robust, user-friendly solutions.

My technical toolkit spans Objective-C, Swift, SwiftUI, Core Data, ARKit, SceneKit, and more, with hands-on experience in CloudKit, OAuth, and secure data handling. I focus on performance, code quality, and a great user experience, delivering scalable apps and mentoring teams to adopt best practices across the development lifecycle.

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Experience Level

Expert
Expert

Language

English
Fluent

Work Experience

Cyber Research Consultant at Killswitch Cyber LLC
April 1, 2025 - Present
Conducting threat research and vulnerability analysis on iOS ecosystems, developing security tools, and automation scripts to enhance application security. Collaborating with cross-functional teams to integrate security throughout the software development lifecycle. Develop security tools, proof-of-concepts, and automation scripts for offensive and defensive use cases.
Mobile Developer (iOS) at Mass Virtual Inc
October 1, 2023 - March 1, 2025
Designed and implemented LCMS and distribution for deploying web-based Unity training simulations on iPad OS. End-to-end development of iPad applications using UIKit and SwiftUI, focusing on data security and compatibility.
Lead Software Engineer at Securemac
February 1, 2022 - September 1, 2023
Led the enhancement of shared Mac applications, focusing on malware detection and data security for MacScan3 and Privacy Scan. Designed and developed a sandboxed version of MacScan3 utilizing secure bookmarks for enhanced user security.
Consultant Lead Software Engineer at Spirion
March 1, 2020 - February 1, 2022
Enhanced and maintained shared C++ and Objective-C code for data security endpoint agents across multiple platforms, including iOS.
Consultant Senior Software Engineer at dotdecimal
October 1, 2019 - March 1, 2020
Developed a 1.0 product for the Radiation Therapy space, including Swift implementation and UI/UX design using UIKit and Structure Framework with LIDAR Camera.
Consultant Software Engineer at Satcom Direct
July 1, 2019 - September 1, 2019
Developed iOS applications for in-flight connectivity solutions, enabling real-time communication and flight logging for pilots called SDCrew. Integrated various APIs for satellite communication and data transfer, enhancing the functionalities of existing mobile applications.
Mobile Application Developer at Dear Doodles
June 1, 2013 - July 1, 2014
Designed and developed a mobile app for a children's educational platform, which included interactive drawing and learning features. Augmented Reality iOS App: Developed an iOS application integrating ARKit to livestream voice actors' facial expressions, showcasing innovative uses of AR technology.
Senior Software Engineer at Malwarebytes Inc.
September 1, 2015 - May 1, 2019
Developed native iOS applications for malware endpoint scanning and remediation, focusing on performance and user experience.
Senior Solutions Architect at Houghton Mifflin Harcourt
April 1, 2011 - January 1, 2014
Spearheaded the design and development of digital learning products, including educational apps for the iTunes Store Algebra 1 Fusion, and Instant Readers. Lead Architect for redesigning Digital Book content generation to proprietary iPad products for Digital Learning platform in iTunes app store.
Lead Software Engineer at Spirion
March 1, 2020 - February 1, 2022
Enhanced and maintained shared C++ and Objective-C code for data security endpoint agents across multiple platforms, including iOS.
Senior Software Engineer at dotdecimal
October 1, 2019 - March 1, 2020
Developed a 1.0 product for the Radiation Therapy space, including Swift implementation and UI/UX design using UIKit and Structure Framework with LIDAR Camera.
Software Engineer at Satcom Direct
July 1, 2019 - September 1, 2019
Developed iOS applications for in-flight connectivity solutions, enabling real-time communication and flight logging for pilots called SDCrew. Integrated various APIs for satellite communication and data transfer, enhancing functionalities.

Education

M.S. in Computer Information Systems at University of Phoenix
January 1, 1997 - January 1, 1999
B.S. in Computer Information Systems at St. Leo University
January 1, 1987 - January 1, 1990
M.S. at University of Phoenix
January 1, 1997 - January 1, 1999
B.S. at St. Leo University
January 1, 1987 - January 1, 1990

Qualifications

Agile/Scrum Methodologies
January 11, 2030 - December 5, 2025
Various Technical Workshops
January 11, 2030 - December 5, 2025

Industry Experience

Software & Internet, Professional Services, Media & Entertainment, Education