Freelancer profile translated to English.

Description

Senior full-stack developer, I support small and large companies, as well as project owners, from the initial idea to production, with a product vision, strong technical expertise, and a clear objective: performance and profitability.

From strategy to execution, I am involved in the entire chain:

• Product scoping and technical design

• Application architecture and technology choices

• Frontend & backend development

• API design and data structuring

• Integration of AI functionalities (automation, assistants, recommendations, analysis)

• CI/CD automation and deployments

I can manage a project from A to Z (MVP, SaaS, business application) or strengthen an existing team to ensure reliability, structure, or accelerate a product.

My approach is results-oriented, aligning technology with your business challenges, optimizing costs, accelerating time-to-market, and building high-performing, maintainable, and value-generating solutions.

Industry field of expertise

Languages

Italian
Fluent
French
Native or bilingual

Workplace preferences

Remote only

Primarily works remotely

Tuneo - Side project
SaaS - Desktop software for engine remapping professionals
AUTOMOBILE
January 2025 - Today (1 year and 5 months)
I am currently developing Tuneo, a comprehensive software for automotive remapping professionals, designed to centralize, organize, and execute all engine mapping editing tasks.

Conceived as a high-end technical tool, Tuneo combines performance, ergonomics, and visual elegance, with a dark, minimalist, and professional interface.

Key features:
Toolbar with custom functionalities ("tools") for managing and calculating engine maps
Generation and transformation of maps from internal databases
Modular architecture for quick integration of new tools
Configuration system to adjust behaviors and calculation formulas as needed
Secure connection via Google OAuth, with user management using Supabase

I am also responsible for the entire artistic direction of the project: visual identity, typographic choices, and a refined technical style to enhance the software's expert and premium positioning.

Technical stack:
Front-end & UI: React, Electron, TypeScript, Tailwind CSS, Redux Toolkit
Back-end: Supabase (authentication, database, API)
Security: Integrated Google OAuth authentication
Packaging & updates: Electron Builder
Typescript redux React.js Algorithms Clean Code
Artur
Fintech - Lead Frontend & Full-stack
BANKING AND INSURANCE
November 2019 - June 2025 (5 years and 7 months)
Paris, France
Responsible for the complete development of web and mobile platforms since the project's launch.

I led the design, architecture, and production of the entire front stack (web + mobile app), in direct collaboration with the founders, the product department, and the back-end teams.

Artur.ai is an innovative fintech that democratizes investment by allowing users to aggregate their accounts (via Powens) and automatically invest in various products through a simple and secure interface.

My responsibilities:
From-scratch development of the web app (React + TypeScript) and mobile app (React Native).
Front-end architecture: unified design system, routing, state management with MobX, GitLab CI/CD.
Complex & secure integrations: bank aggregation (Powens), KYC, investment gateways (partner APIs).
UX & performance optimization.
Contribution to the back-end (Django).
React.js Typescript React Native Python/Django User Interface Design
ECU Motoring
Development of a web application for an automotive engine remapping professional
AUTOMOBILE
January 2024 - June 2024 (5 months)
Development of a web application for an automotive engine remapping professional.

On this project, I was responsible for the entire development and artistic direction, with a clear goal: to bring a modern, authentic, and elitist visual identity to the world of engine remapping.

Objectives:
Create a fluid and impactful user experience
Offer a professional tool that matches the high-end image of the tuner

Main features:
Responsive landing page with a sleek design, conversion-oriented
High-performance search engine to explore performance gains for different remapping stages

I designed the entire artistic direction: choice of colors, typography, graphic ambiance, and overall UX – to create an image that is both sophisticated, modern, and credible.

Technical stack:
Front-end: React, Next.js, Tailwind CSS
Back-end: Node.js (custom API)
React.js Node.js Next.js TailwindCSS UI/UX Design

Check out Steven's experience

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Samsung Campus Training – Fullstack Web Developer (RNCP level 5 certification)
Samsung Campus
2020
Formation Epitech et Samsung : - Développement front-end (HTML, CSS, JS ES6+, React, Responsive, accessibilité) - Développement back-end (Node.js, Express, APIs REST, BDD SQL/NoSQL) - Mobile : React Native - Méthodologie Agile, Git, CI/CD, Docker - Projets en équipe, mentorat, UX/UI, soft-skills & business (module ESSEC)

Steven Sammarone

Fullstack Developer / AI Engineer

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