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Valentin VetterVV

Valentin Vetter

🏆 Senior Fullstack Developer

€778/day
Montpellier, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Valentin

🚀 Full Stack Developer | 12 years of experience

Expert in SaaS development, I design high-performing, elegant, and custom web and mobile applications.

**Mission Criteria**:

With a strong desire for side-projects and available evenings and weekends, I am looking forshort-term or fixed-price missionsthat allow me to use my skills while adding value to a growing business.

**Background**:

I have worked for startups, scale-ups, and large corporations in various fields (tech, banking, health, video games, recruitment...).

**Services Offered**:

â—Ź Web design and development (front-end, back-end, infra, sysadmin) with expertise in React/Node
â—Ź Integration of third-party APIs: Stripe, Firebase authentication, billing service...
â—Ź Mobile (React Native/Expo) and software development
â—Ź Technical leadership: team member supervision and mentoring, Lead Dev/Tech Lead role
â—Ź Performance optimization (algorithms, SQL queries, system design...)
â—Ź Training (React, Git, Node.js, TypeScript, JavaScript, Expo & React Native, Socket.io & WebSocket...)
  • French

    Native or bilingual

  • English

    Fluent

  • Spanish

    Basic

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

Experience

  • Swan
    Senior Software Engineer
    BANKING AND INSURANCE
    September 2024 - Today (1 year and 10 months)
    Montpellier, France
    Squad: Strong Customer Authentication

    Topics: IAM, SSO (SAML/OIDC), SMS & email OTP, Silent Authentication, Edit Phone Number, OAuth 2.0, Webauthn, JWT, Authenticator, Consent, MCP server...

    Generative AI Tools: Cursor, Claude Code, Agents
    Node.js GraphQL NestJs TypeScript Apache Kafka
  • KafĂ© Studio
    Lead Dev - Freelance
    RESTAURANTS AND FOOD SERVICE
    March 2024 - August 2024 (6 months)
    Montpellier, France
    Designed a website allowing restaurants/merchants to improve their Google reviews and increase customer loyalty through a prize-winning roulette.
    React.js Stripe Node.js TypeScript PostgreSQL OVH
  • CodinGame (CoderPad since 2021)
    Full Stack Developer
    SOFTWARE PUBLISHING
    June 2016 - May 2023 (7 years)
    Montpellier Area, France
    â—Ź Feature development: design, development, testing, code review, deployment, monitoring, analytics, refactoring.
    Examples:
    - Stripe payment, Zoho Invoice billing
    - onboarding process: +15% retention
    - creation of games and technical tests
    - redesign of the IDE, test creation, profile, landing page...
    â—Ź Speaker/Tech talks: Expo & React Native, Git internals, Socket.io & WebSocket, TypeScript introduction
    â—Ź Mentoring interns and conducting job interviews
    Java TypeScript React.js AngularJS Amazon Web Services Stripe Zoho Invoice Node.js Gitlab CI Docker Kubernetes Google Cloud WebSocket GraphQL

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Education

  • Computer Science and Applied Mathematics Engineer
    ENSEEIHT, Toulouse
    2014
  • MP Prep Class
    Lycée Kléber, Strasbourg
    2011

Skill set

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