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Giovanni ColonniGC

Giovanni Colonni

AI Engineer | Senior FullStack Developer

€500/day
Paris, FR
3-7 years

Average response time: 1 hour

About Giovanni

Vous avez un produit à faire avancer, pas juste du code à empiler. En tant qu’ingénieur full-stack basé à Paris, je vous accompagne de l’architecture au déploiement : applications web et mobile, APIs, pipelines IA et infrastructure cloud - avec un vrai ownership sur les résultats.

Concrètement, je peux vous aider à lancer ou scaler un MVP, refondre une app trop lente, industrialiser vos déploiements, ou intégrer l’IA (RAG, agents, MCP) dans un produit existant - sans sacrifier la qualité ni la maintenabilité.

Ce qui me distingue : une double casquette tech lead et hands-on. J’ai mené des équipes tout en livrant moi-même, réduit un temps de chargement P99 de 17s à 3s, et conçu des pipelines RAG en production pour la fintech et l’ERP. DevOps (Terraform, Kubernetes, GitOps sur Azure) + IA (LangChain, embeddings, orchestration LLM) : rarement les deux dans le même profil.

Livrables habituels : apps React / Next.js / React Native, APIs Node.js ou Go, refontes front-end, intégrations tierces (ERP, paiement, data providers), apps mobiles App Store / Play Store, infra as code, CI/CD, serveurs MCP connectés à vos données métier, back-offices et outils internes.

Startups, scale-ups, PME - parlons de votre prochain jalon.
  • Italian

    Native or bilingual

  • English

    Fluent

  • Spanish

    Fluent

  • French

    Fluent

Can work on-site
Paris (up to 50km)

Experience

  • Paage
    Fullstack Tech Lead
    TECH
    February 2026 - May 2026 (3 months)
    Paris, France
    Tech — 40% leadership / 60% hands-on full-stack. UI performance overhaul — cut P99 total page load from 17s → 3s (≈83% reduction) by refactoring client-side fetch and data-loading logic, optimising backend API endpoints, and applying targeted React rendering optimisations. Intelligence pipeline (Scrape + RAG + LLMs + Analysis) — end-to-end system for data collection, classification, and clustering using RAG, LLM orchestration, embeddings, and clustering to derive the classification topology. Production pipeline (retrieval, vector storage, eval loop, observability) — powering UX personalisation and product page SEO to cut churn from misaligned messaging.
    React | Next.js PostgreSQL RAG User Experience Design LLM
  • Feefty
    Software Engineer
    BANKING AND INSURANCE
    May 2024 - February 2026 (1 year and 9 months)
    Paris, France
    Feefty is a platform focused on structured financial products, allowing users to buy, request, and create personalised structured products, with additional services for issuers and financial advisors. JavaScript-based stack: React and Next.js on the frontend, Node.js on the backend. Integrated the platform with enterprise financial data providers (Harvest) to keep portfolio positions, quotations, and account status continuously in sync. Designed and implemented a LLM driven system for automated booking. Developed and maintained features across the full product stack — back-office tools and client-facing applications under strict UI/UX constraints.
    React | Next.js PostgreSQL Développement Back-End Node.js
  • Amadeus - Nice (FR)
    DevOps Engineer
    SOFTWARE PUBLISHING
    January 2023 - May 2024 (1 year and 4 months)
    Nice, France
    Designed hybrid CI/CD pipelines for Amadeus applications, from the development phase up to deployment both on Azure and on-premise infrastructure, integrating Terraform in the management of Azure cloud infrastructure and nodes. Developing and maintaining a Container Deployment Manager service for internal tool (both office and production tools) +150 services, leveraging Azure technologies and Services; also Kubernetes resources and other tools like Helm and ArgoCD, React for the FR and python for BK.
    Kubernetes Microsoft Azure React.js Programmation Python GitOps

Recommendations

LB
Koami K.KK
Louis Bidault and 1 other person have recommended Giovanni

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Education

  • Erasmus+ Exchange
    Universitat Politècnica de Catalunya
    2022
    Erasmus+ Exchange
  • Master's Degree
    -Polytechnic of Turin
    2022
    Master's Degree

Skill set

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