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Sylvio G.SG

Sylvio G.

Fullstack Developer Symfony · Node.js · React

€550/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Sylvio

Fullstack developer (Symfony, Node.js, React, Nuxt.js) and freelance cloud engineer, I help SMEs, startups, and agencies build their web applications, business software, and AI agents, from backend architecture to production deployment.

A reliable business tool, a backoffice, an API, processes to automate: that's what I deliver daily.

AI INTEGRATION & AUTOMATION
I designed and deployed a voice AI agent that takes phone orders for a pizzeria, currently in production: conversational architecture, LLM optimization, management dashboard, complete cloud infrastructure. I also developed a revenue forecasting module (weather, events, payroll cycles) and regularly automate data flows, scripts, and scheduled tasks.

WEB APPLICATIONS & BUSINESS SOFTWARE
Symfony or Node.js backend, REST API, administration backoffices (EasyAdmin, custom dashboards), React, Nuxt.js, Next.js or Vue.js frontend depending on the project. I also take over legacy PHP applications to evolve them without a brutal overhaul.

CLOUD & INFRASTRUCTURE
Architecture, deployment, and management: Docker, CI/CD, Scaleway, Cloudflare. Environment management (test, pre-prod, prod), backups, monitoring, Linux server security.

WHAT YOU CAN EXPECT FROM ME
My clients stay: annual maintenance contracts renewed, software still in production years after delivery. I work 100% remotely, I respond quickly (within 1 hour during the day), and I deliver documented and maintainable code. A single point of contact, from the specifications to maintenance.

Have a project or an automation need? Write to me.
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Client revendeur de POS
    AI Revenue Forecasting Module & Kiosk Software
    RESTAURANTS AND FOOD SERVICE
    November 2025 - January 2026 (2 months)
    Saint-Pierre, Réunion
    Took over a legacy PHP dashboard to integrate two components: interactive order kiosk software and a revenue forecasting module.

    The module cross-references external factors (weather, local events, payroll periods, school holidays) to help the manager anticipate business activity and adjust staffing. All integrated into the existing system, without a complete overhaul: new features, legacy code respected, zero service interruption.
    PHP Artificial Intelligence JavaScript Automation MySQL
  • Client restauration
    Design of a Voice AI Order-Taking Agent
    RESTAURANTS AND FOOD SERVICE
    November 2025 - Today (7 months)
    Saint-Pierre, Réunion
    I designed and deployed an AI agent that takes phone orders for a pizzeria, currently in production.

    The project covered the entire chain: conversational architecture of the agent, system prompt optimization (60% fewer tokens, latency and costs reduced accordingly), benchmarking LLM models on the cost/latency/quality trifecta, development of the order management dashboard in Nuxt.js, and setting up the infrastructure from scratch (VPS, database, deployment, monitoring).

    The restaurateur no longer answers the phone during busy hours: the agent takes the order, and the dashboard displays it.
    Artificial Intelligence Node.js Nuxt.js Automation PostgreSQL
  • Professeure indépendante
    Course Booking Platform with Backoffice
    EDUCATION AND E-LEARNING
    October 2025 - November 2025 (1 month)
    Development of an appointment booking website for an independent teacher looking to save time: slot booking for students, and a complete management backoffice (rooms, slots, students, schedule).

    Developed in Nuxt.js and hosted on Cloudflare. The site is live and used daily.
    Nuxt.js Node.js Vue.js Automation Supabase

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Education

  • Professional Bachelor's Degree in Software Engineering
    IUT de Metz, University of Lorraine
    2022
    Licence Professionnelle Génie Logiciel
  • University Diploma in Technology (DUT)
    IUT de Metz, University of Lorraine
    2021
    DUT

Certifications

  • Test of English for International Communication (TOEIC)
    Iut de Metz
    2022

Skill set

Categories