Freelancer profile translated to English.
Back to original languageAbout Dimitri
Expert iOS / Swift – Senior Developer (15+ yrs, ex-Apple , BeReal)
Senior iOS developer for over 15 years, I design and develop iPhone, iPad, and Mac applications used by millions of users. Notably, I spent5 years at Applerevamping Xcode, and3 years at BeRealscaling the app to 25 million DAU.
I bringsenior technical expertiseto frame, code, audit, and stabilize your code, along with astrong UI/UX/design/product sensibilityhoned by my experiences at Apple and with consumer apps.
- A highly senior iOS development profile (Swift / SwiftUI / UIKit)
- Ability to manage a project with **complete autonomy**, from idea to production.
- **High standards for code quality**: architecture, performance, maintainability.
- Product and UI/UX senseinherited from experiences with large-scale consumer apps.
- Complete developmentof iOS applications (from scratch or taking over existing ones).
- Structuringarchitecture(scalable, testable, durable).
- Refactoringand improving existing code.
- Technical auditsand recommendations.
- Close collaboration with product/design to refine features and user experience.
- Rapid delivery of clean, robust, production-ready features.
- I am highly **execution-oriented**: I code, I ship, and I take responsibility for the outcome.
- I canwork alone or integrateinto an existing team, with clear and direct communication.
- (Bonus): experience withmodern tools (AI, agents…)to accelerate development, while maintaining high standards for code quality.
French
Native or bilingual
English
Native or bilingual
Can work on-site
Paris (up to 10km)
Experience
- ZamaiOS DeveloperTECHSeptember 2024 - April 2025 (7 months)- Created 3 iOS apps based on Zama's "Full Homomorphic Encryption" (FHE) technology.- Ported the Rust/Python SDK to Swift.- Independently developed 3 apps, demonstrating FHE and how to perform computations on encrypted data, protecting user privacy.- Blog:
- BeRealSenior iOS EngineerSOCIAL NETWORKSJuly 2021 - August 2024 (3 years and 1 month)Senior iOS Developer at BeReal for 3 years, joining the company in its early stages. I contributed to scaling the product to over 25 million daily active users, addressing critical performance, scalability, and maintenance challenges.I developed key iOS features in Swift, SwiftUI, and Concurrency, while ensuring the stability and evolution of an existing legacy codebase (Firebase, UIKit, RxSwift, Combine).BeReal was named App of the Year 2022 at the Apple App Store Awards.
- Autres Expériences FreelanceiOS ExpertSOFTWARE PUBLISHINGFebruary 2015 - Today (11 years and 4 months)● AirFrance / dgBirds — iPad app for pilots, PDF reader for flight manuals.● Audi — iPad app for dealerships, interactive showroom of the range.● BPCE — Neo-bank app, from scratch. Open Banking, Apple Pay, KYC.● Peugeot — Audit and refactoring of a multi-brand legacy app, 150K lines of code.● TF1 — Audit and refactoring of the Video Player used by TF1, LCI, and TFOU Max.● BFMTV — BFMTV app on TV, released simultaneously with the TV launch.● Mind — Meditation app on TV, featured by Apple.● Cdiscount — Code audit, recommendations, and optimization of deeplinks.● IDFA, SKAdNetwork, and ATT (App Tracking Transparency) consulting (iOS 14.5).
Reviews
Thibaud
Middle Motion
Reviewed on 7/5/2021
We hired Dimitri for the delicate task of migrating a Windows application to a Mac application. It quickly became clear that Dimitri masters his subject. You can trust him blindly! Not only was everything defined in the specifications completed, but Dimitri also suggested interface adaptations that were very useful for redesigning the Windows application. So we benefited from real support and we are very happy. Finally, he is very organized, so we get sustainable code, which is extremely important!
C
Christopher
MOBSUCCESS
Reviewed on 4/15/2021
Very professional and efficient, Dimitri guided us through a consulting engagement related to the changes brought by iOS 14.5. Even though the OS was not yet available, he went beyond our expectations to help all teams understand the stakes and the way forward.
Recommendations
VZ
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Education
- Specialized Engineering - ISIA Sophia AntipolisMines Paris - PSL2007
- Generalist Engineering - Computer Science OptionMines Nancy - Université de Lorraine2006