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Alexis BaratAB

Alexis Barat

Senior iOS Developer • Social, AI & Arch

€700/day
5 projects
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Alexis

 iOS Developer for 11 years

I develop complex iOS apps, from R&D to production, with a true product vision and an obsession for detail.

What I bring concretely:
- A solid architecture ready to scale
- Native AI integration in development flows
- My passion for high-quality animations and innovative designs
- Field knowledge: I also know how to distribute and grow an app on TikTok and Instagram

My most notable projects:

Roze Messaging • 4 years • Founding team

E2EE messaging app used by thousands of users. Decoupled Engine/UI architecture, Signal protocol, AI features, embedded audio/video: voice transcription, emotion detection, automatic subtitles.

Sweepin • 4 years • Lead iOS

Patented indoor localization system, deployed in +30 hospitals in Europe. Full R&D: Bluetooth, machine learning, real-time mapping.

Avalon • 8 months • Lead iOS

Luxury asset management app with bank-level security. Secure Enclave, Face ID, 100% unit-tested architecture.

My preferred stack:
Swift · SwiftUI · Metal · Combine · SQLite · Go · Figma • Linear

A discussion is often enough to clarify the direction. Write to me!
  • French

    Native or bilingual

  • English

    Native or bilingual

Can work on-site
Paris (up to 20km)

Experience

  • Roze Messaging
    Development of an E2E messaging application
    SOCIAL NETWORKS
    September 2020 - October 2024 (4 years and 2 months)
    Paris, France
    Founding team member of an end-to-end encrypted B2C messaging app used by thousands of active users. Decoupled and modular Engine/UI architecture (SPM), 100% unit tested.
    Embedded AI features: real-time voice transcription, emotion detection with live UI updates, automatic video subtitles. Signal protocol for E2E encryption.
    Swift SwiftUI Encryption E2E Messaging
  • Avalon • THMG
    Development of a luxury asset management app - bank-level security
    LUXURY GOODS
    July 2025 - February 2026 (7 months)
    Genève, Switzerland
    Companion app for scratch for a luxury asset storage platform: watches, jewelry, art, fine wines. Bank-level security: Secure Enclave to encrypt all network calls, Face ID, private courier delivery management.
    Modular Engine/UI architecture, 100% unit tested. Two engineers, fifty screens, delivered in 3 months with 2 weeks ahead of schedule.
    iOS Development Encryption Swift SwiftUI Clean Architecture
  • Sweepin
    Lead iOS - Patented indoor localization system
    MEDICAL
    August 2015 - February 2019 (3 years and 5 months)
    Dijon, France
    Co-invention of an infrastructure-free indoor localization system, patented and deployed in +30 healthcare facilities in Europe. Full R&D over 4 years: Bluetooth, machine learning, real-time mapping, geolocated notifications. Proximity marketing framework via iBeacons, NFC, and QR codes, integrated into a dozen applications.
    Swift Objective-C Machine Learning Mapping Localization

Reviews

5.0

Out of 5 ratings

FlorentF

Florent

DIGIMOBEE

Reviewed on 6/4/2020

Very satisfied with the mission carried out by Alexis. A competent and professional expert, he is also an excellent coach who helped us move forward in our developments. It was a pleasure to work with Alexis, whom I recommend. It is not impossible that we will call upon him again for future work.
AD

Account deleted

Reviewed on 3/18/2019

Alexis is a very serious developer in his work. The service provided conforms to the initial specifications.

Recommendations

NA
WM
Nicolas Aumaistre and 1 other person have recommended Alexis

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Education

  • Professional License - Internet Systems for Business, Mobile Specialization
    University of Burgundy
    2015
    Spécialisation mobile dès 2012, avant même qu'iOS soit un standard industriel. Le reste s'est construit sur le terrain.

Skill set

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