Open to opportunities

Hermann User

@hermannuser

Message

Senior iOS Developer with a passion for seamless user experiences.

Canada

Message

What I'm looking for

I am looking for opportunities that foster innovation, collaboration, and continuous learning in a dynamic environment.

As a Senior iOS Developer with 7 years of experience, I have successfully delivered scalable and high-quality mobile applications for both startups and Fortune 500 companies across Canada, France, and the USA. My expertise lies in Swift, MVVM, Clean Architecture, and test-driven development, which allows me to create seamless user experiences while solving real-world problems. I am passionate about driving continuous product improvement and ensuring user satisfaction.

In my recent role at GoDaddy, I led the development of a multi-product communication system that centralized user interactions, significantly improving workflow efficiency and user engagement. I have a proven track record of implementing Clean Architecture and increasing unit test coverage, which has resulted in reduced crash rates and improved app performance. My experience also includes mentoring and tutoring aspiring developers, as well as exploring opportunities in AI training.

Experience

Work history, roles, and key accomplishments

Current

Senior IOS Developer

Current

Godaddy

Jan 2022 - Present (3 years 5 months)

Led the development of a multi-product communication system that centralized user interactions using Swift, Combine, and Clean Architecture, improving workflow efficiency and retention. Designed and implemented Clean Architecture, refactoring parts of the app in SwiftUI, which increased unit test coverage and decreased crash rates. Developed subscription infrastructure using in-App Purchase (Store

Swift Combine Clean Design UIKit Codable SwiftUI XCTest Git Agile

IOS Developer

TribalScale

Sep 2020 - Present (4 years 9 months)

Improved maintainability of client applications by refactoring legacy Objective-C code into Swift and implementing new MVVM architecture for scalability. Built a cross-platform restaurant app using Flutter. Led to a new architecture for a flight company app, improving test coverage and reducing crash rates.

Objective C Swift MVVM Flutter Git Agile

Contractor IOS Developer

Hootsuite

Apr 2019 - Present (6 years 2 months)

Built features like Instagram stories customization using a third-party SDK and implemented 'Sign in with Apple', enabling media sharing from a centralized content repository, which increased daily active users. Applied MVVM and Clean Architecture with RxSwift to increase test coverage and reduce crash percentage. Used GraphQL to unify message schemas from multiple social media platforms, reducing

Instagram SDK Sign In With Apple MVVM RxSwift RxTests GraphQL

IOS Developer

Benext

Jan 2017 - Present (8 years 5 months)

Delivered mobile features for clients across various industries including banks, sports betting, and social event platforms. Built features using Swift, Objective-C, MVVM, and RxSwift. Implemented tests using XCTest, improving adaptability and understanding of specific company needs.

Swift Objective C MVVM RxSwift XCTest

IOS Developer (Intern)

BNP Paribas Cardif

Nov 2015 - Present (9 years 7 months)

Worked in the innovation team developing internal-use applications for employees, such as office information and bus schedules. Built MVPs using Swift and MVVM, focusing on usability and quick delivery.

Swift MVVM

Education

Degrees, certifications, and relevant coursework

Epitech

Master’s in Computer Science, Computer Science

Pursued advanced studies in computer science, focusing on specialized areas such as software engineering, algorithms, and system design. Completed a 1-year exchange program at Tecnológico de Monterrey in Querétaro, Mexico, broadening international academic experience.