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Quentin GuilloutQG

Quentin Guillout

Supermalter

Versatile Android Developer (Kotlin and Java)

€350/day
3 projects
Biarritz, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Quentin

Android Developer (Java and Kotlin) with 11 years of experience.

Passionate about IT, I learned through my experiences as a self-entrepreneur and startup co-founder to be very versatile, resilient, and to work in a team. I have mastered the different stages necessary for the creation, publication, and maintenance of a mobile or web application, as well as understanding user needs and processing their feedback.
I place great importance on designing clear, well-structured, commented, and optimized code, as well as a fluid interface with attention to detail, while scrupulously respecting the specifications, deadlines, and client needs.

Today, I wish to put my skills to the service of Android development, maintenance, or takeover projects in order to discover new projects and enrich myself with new experiences.
  • French

    Native or bilingual

  • English

    Fluent

  • Spanish

    Conversational

Can work on-site
Biarritz (up to 50km), Bordeaux (up to 10km), Pau (up to 50km)

Experience

  • Freelance
    Freelance Android Developer (Kotlin and Java)
    SOFTWARE PUBLISHING
    June 2025 - Today (1 year)
    Biarritz, France
    Actively seeking new Android development, maintenance, or takeover projects (Kotlin or Java), self-training on new Android and AI technologies and tools, technological watch.

    - Seeking new projects.
    - Improving and updating Android and AI skills.
    - Technological watch.
    Android Jetpack Compose Coroutines Clean Architecture Flow
  • Quiz Arena
    Co-founder - Full Stack Developer and Quiz Content Manager
    EDUCATION AND E-LEARNING
    September 2023 - May 2025 (1 year and 8 months)
    Biarritz, France
    AI for training to create games with a virtual host. Development of a web and mobile page for booking slots in a game room (Next.js, TypeScript, Stripe) and backend (SST, AWS Lambda, PostgreSQL). Game content management.

    - Participation in defining and evolving the game concept and mechanics.
    - Development of a web and mobile platform for booking game slots in a room (Next.js, TypeScript, Stripe, SST, AWS, Kysely, PostgreSQL).
    - Development of new features and evolution of game application mechanics and design (React, TypeScript, Emotion, SST, AWS).
    - Creation of an emergency call management flow in a game room (TypeScript, AWS, Bland AI).
    - Management of themes and content for games (blind test and general knowledge) in French and English.
    - Involvement in strategic decisions.
    - Technological watch.
    Next.js React.js Typescript PostgreSQL Stripe
  • FOXYZ
    Malt logoOn Malt
    Freelance Android Developer (Kotlin)
    SOFTWARE PUBLISHING
    May 2023 - June 2023 (1 month)
    Android web browser (Kotlin) opening a link upon reading an NFC badge with secure connection management (domain and credential saving) as well as memory and cache release management/testing after each use.

    - Definition of UX/UI in accordance with the client's graphic charter.
    - Development of a lightweight web browser with memory and cache release after each use.
    - Memory testing and benchmarking after displaying a web page.
    - Application configuration to be used by default for reading an NFC badge and opening an http/https link.
    - Custom management of secure connections (popup with credentials, password encryption, retention of a list of credentials and domains in application memory).
    - Testing and improvement at the client's site with the relevant badge reader (Sunmi V2 Pro).
    - Setup and management of a GitHub repository.
    - Creation of a signed APK file.
    - Writing documentation for application installation and configuration.
    - Management of feedback, bugs, and improvements.
    Kotlin Android NFC Security Web navigation

Reviews

5.0

Out of 3 ratings

L

Laurent

FOXYZ

Reviewed on 5/23/2023

Hello, We are very satisfied with the service and the development carried out. The application was developed quickly and meets our requirements exactly. We recommend his services for Android development. Sincerely, The Foxyz Team
P

Philippe

LPJ Sàrl

Reviewed on 5/22/2023

I highly recommend Quentin as a competent and reliable Android developer. I was impressed by his technical expertise, his ability to meet deadlines, and to deliver high-quality results. Quentin masters the programming languages required for the mission, particularly Java. He designed well-structured software architectures, solved complex problems, and optimized application performance. Quentin communicates effectively, collaborates with the team, and willingly shares his knowledge. His positive attitude and willingness to take on the mission's challenges, such as video processing, compression, and applying OpenGL filters, make him an excellent freelancer. In summary, Quentin is a talented, passionate, and reliable Android developer who brings real added value to any mobile application development project. I highly recommend him.

Recommendations

FU
Maxime AubaretMA
Former user and 1 other person have recommended Quentin

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Education

  • Engineering Degree, Computer Science
    CY Tech
    2011
    Diplôme d'ingénieur, Informatique
  • Master of Science in Administration
    IAE Pau-Bayonne
    2011
    Master, Administration et gestion des entreprises

Skill set

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