Sebastian V.
Freelance iOS Developer
Experience
Feb 2025 - Present
9 monthsFreelance iOS Developer
Jamitlabs
- Contributes to the iOS apps: PasKal and DocuSketch
- Acting as the main communication bridge between the client and other external developers, ensuring clear requirement alignment and smooth technical collaboration
- Improved app performance and responsiveness by introducing Swift Concurrency to parallelize network calls, database operations, and background sync logic
- Refactored core architecture by transitioning from TCA (The Composable Architecture) to MVVM, improving maintainability and development efficiency
Apr 2022 - May 2025
3 years 2 monthsLead iOS Developer
IU International University of Applied Sciences
- Lead a team with up to 4 other iOS developers
- Enhanced the application's features to effectively fix bugs and optimize overall performance, reliability, and efficiency
- Setup and configured a local Swift web server within the application to provide full access to the hybrid content parts of the app
- Supported the PO in feature development and technical exchange with stakeholders
Sep 2018 - Mar 2022
3 years 7 monthsOldenburg, Germany
IT Consultant
Lufthansa Industry Solutions
- Hermes: Last Mile Application (Kotlin Spring Boot Api, Kotlin Android App, TypeScript Frontend, AWS, Terraform, Jenkins)
- LHT (Lufthansa Technik): Aviatar (Kolin - Spring Boot Api, MSSql, Openshift, Azure, Jenkins)
- LH Cargo: LAT Flashcards (Crossplatform App, iOS & Android, Xamarin C#), CheckIn App (iOS App Swift)
- Linde: Installation App (iOS App Swift)
- LHIND: Presence App (iOS App Swift, Kolin Spring Boot Api), Push-Service (Java Spring Boot Api, Azure, MariaDB, Docker)
Dec 2015 - Aug 2018
2 years 9 monthsOldenburg, Germany
Senior iOS Developer
GovConnect GmbH
Jan 2015 - Nov 2015
11 monthsBerlin, Germany
iOS Developer
Teamplace GmbH
May 2014 - Dec 2014
8 monthsBerlin, Germany
iOS Developer
expectare GmbH
Apr 2013 - Apr 2014
1 year 1 monthBerlin, Germany
iOS Developer
datedicted GmbH
Summary
Experienced software developer with more than a decade of experience in crafting innovative mobile applications and robust backend services.
Extensive knowledge across all stages of the software development lifecycle, from initial concept through to development and final delivery.
Languages
German
NativeEnglish
AdvancedCertifications & licenses
IT Specialist for Application Development (IHK)
GPB - Society for Personnel Development and Education
Projectmanagement
Education center at the IFW
Quality Management
GBW non-profit vocational training center
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