Jonathan Giamporcaro Email & Phone Number

France

Paris, Île-De-France, France

Paris, Île-De-France, France

Driven by a genuine passion for blockchain technology, I developed and led a hands-on, project-based course on Solidity and Ethereum for 13 engineers at Ledger. Starting from the ground up, I crafted an immersive curriculum that transformed the team from beginners into proficient smart contract developers capable of creating, deploying, and maintaining contracts on the Ethereum Virtual Machine (EVM).The course spanned nearly 20 in-depth chapters, each designed to balance theory with intensive coding practice. Engineers tackled real-world simulations and complex puzzles, sharpening their skills in gas optimization and building confidence in Solidity. The program culminated in a rigorous, six-hour final project that tested their ability to apply everything they’d learned in a high-stakes setting.A highlight of the curriculum was a thorough introduction to Foundry, equipping engineers with essential tools for efficient smart contract development and management. Advanced modules on bytes, assembly, and YUL pushed their skills further, preparing them for the demands of blockchain innovation.Throughout, I placed a strong emphasis on security and efficiency, instilling best practices and raising awareness of potential vulnerabilities in blockchain systems. By fostering a culture of secure, mindful development, I contributed to Ledger’s expertise in delivering robust solutions for global clients, positioning the company as a leader in the blockchain and cryptocurrency industry.

Ville De Paris, Île-De-France, France

Paris, Île-De-France, France

👁 Front-End DevelopmentBuilt dynamic web applications with TypeScript, JavaScript, React, Next.js, and GraphQL. Implemented SSR, SSG, and incremental SSG for performance and scalability, using Gatsby, Storybook, and Chromatic for component-driven development.🎨 UI/UX & Design SystemsPartnered with design teams to build a cohesive design system, ensuring UI consistency across products. Skilled in CSS Modules and Figma for scalable design integration.🔍 Testing & Quality AssuranceChampioned quality standards with Jest, React Testing Library, Cypress, ESLint, and Prettier, ensuring robust testing and code quality across the team.💪 Team Collaboration & LeadershipManaged and mentored the dev team, optimized Git workflows, and contributed to strategic technical direction. Established efficient collaboration through Git, Slack, and Notion, producing internal documentation and guidelines.🔬 API Integration & ToolsImplemented analytics and user feedback with Sentry and Hotjar, providing insights for product improvement.📊 Product Data Collection & AnalysisUsed tools like Hotjar and Sentry for real-time analysis of user interactions and errors, informing product decisions and reducing technical debt.🌟 Product Vision & Strategic LeadershipContributed to strategic discussions on product vision with the founders, proposing technical and agile improvements aligned with evolving goals.🚀 Key Contributions- Defined technical vision with the CTO, setting guidelines for scalability and performance.- Led the migration from Gatsby to Next.js, reducing technical debt.- Established CI/CD pipelines with automated preview systems, enhancing feature validation.- Developed agile methodologies and standards for continuous improvement and collaboration.

Paris, Île-De-France, France

👁 Front-End DevelopmentLed the development of interactive, scalable web applications using JavaScript, React, Next.js, Vue.js, and GraphQL (Apollo). Utilized advanced tooling like Webpack, Babel, and Material UI for optimized and responsive user interfaces.🎨 UI/UX Design & SystemsCollaborated with designers to create and implement a cohesive design system, unifying product aesthetics and enhancing user experience across our primary and side products. Skilled in CSS, JSS, and UI frameworks to ensure seamless, consistent design.🔍 Testing & Quality AssuranceFocused on code quality with robust testing and linting practices using Jest, Enzyme, ESLint, Pytest, Black, and Flake8. Established CI/CD practices with web accessibility and performance tools like WebHint and Sizzy for a high-quality product.💪 Team Leadership & CollaborationManaged and mentored a cross-functional development team, conducted code reviews, and facilitated internal weekly meetings to align product vision. Worked closely with the back-end lead to define and execute a unified technical strategy.🔬 API Integration & ToolsImplemented API integrations, including Sentry for monitoring, I18next for localization, and Stripe for payment processing.🛠 Back-End Support & DevOpsSupported backend services with Node, Express, and Python (Django) as needed. Leveraged DevOps tools like Docker, CircleCI, and GitHub Actions to streamline development and deployment on S3 and DigitalOcean.🚀 Key Contributions- Led a technical and strategic vision, collaborating with founders on R&D and investor meetings.- Defined development standards and best practices to improve team efficiency and product scalability.- Focused on continuous improvement through regular code reviews and mentoring sessions.

Région De Paris, France

👁 Front-End DevelopmentDeveloped modern web applications with JavaScript, React, Next.js, and GraphQL (Apollo), leveraging CSS-in-JS for component styling and optimizing builds with Babel and Webpack.🎨 UI/UX Design & TestingEnhanced user experience through UI/UX design, from conceptualization (personas, wireframes, mockups) to validation. Built and maintained a design system for product consistency, conducted user tests, and ensured quality with Jest, Enzyme, ESLint, and Prettier.💪 CollaborationCoordinated with internal and remote teams (French, Ukrainian, Polish, Vietnamese) via Git, Jira, Confluence, and design platforms like Sketch, InVision, and Sketch Cloud. Created and documented a Gitflow process to streamline development.🔬 APIs & ToolsIntegrated APIs with Apollo for GraphQL, managed multilingual support with I18next, and monitored app performance with Sentry.🛠 Back-End Support & HostingProvided backend support using Node and Express, configured Docker for deployment, and hosted applications on AWS (Lambda, EC2, S3) and DigitalOcean.🚀 Key Contributions- Led MVP redesign and product overhaul from scratch.- Defined and prioritized MVP features, translating them into user stories.- Solved accessibility and multi-language requirements.- Active participant in product strategy meetings, contributing to major product decisions.

Région De Strasbourg, France

Strategic Planning & Solution Design:I collaborate with you from the concept phase, helping to define your project’s needs and identify the most effective technical solutions to achieve your goals.Custom Development:I develop your project from the ground up, crafting high-quality, scalable front-end applications tailored to your specifications.Reliable Hosting & Support:I handle all aspects of hosting and ensure your application runs smoothly and securely, allowing you to focus on your business.Ready to elevate your project? Let’s discuss how I can help make your ideas a reality. Don’t hesitate to reach out!

Région De Strasbourg, France

Yo News is your personal news assistant, delivering daily updates on your favorite topics directly through Messenger ➡️ m.me/YoNewsOfficiel.🎒 FounderLed product strategy, marketing, and communication initiatives, focusing on a product-first, agile approach. Experienced in pitching and engaging with the startup ecosystem.🤖 Full-stack DevelopmentDeveloped and maintained the platform using React, Node, Express, and Google Cloud with a NoSQL database, ensuring a seamless user experience.🥂 Networking & CommunityActive participant in entrepreneurial networks, including IE Club, Strasbourg Startup, Alsace Digitale, and Startup Weekend.

Managed and coached a competitive Fortnite team, Yo Gaming, to enhance team performance and cohesion.🤝 Team Management- Established collaborative tools to streamline communication and post-training debriefs.- Planned team-building sessions and prepared players for real-life events, including tournaments.- Provided ongoing support to players, fostering a positive and focused environment.💪 Coaching- Developed winning strategies in collaboration with players and conducted detailed training debriefs.- Focused on mental coaching to help players reach their peak performance and maintain resilience under pressure.

Erstein

Web & Mobile Front-End DevelopmentDeveloped and maintained full-stack applications for web and mobile platforms, focusing on creating seamless, responsive user interfaces with React.js for the web and React Native for mobile.🌐 DevelopmentSkilled in building scalable applications with React.js, Node.js, Express.js, and React Native, ensuring high performance and user-centric design.🗿 Workflow & ToolsOptimized workflow and code quality with tools like Git, ESLint, Babel, Webpack, and Flowtype. Collaborated effectively within the team using Git and Slack to maintain clear communication and streamlined development.

Strasbourg, Alsace, France

🚲 Front-End DevelopmentDeveloped responsive web and mobile applications with JavaScript, React, Webpack, Babel, and ESLint, ensuring a consistent and engaging user experience.🚢 Back-End DevelopmentBuilt and maintained back-end services with Node.js, RESTful APIs, and LAMP stack (Linux, Apache, MySQL, PHP), integrating efficient data management with MySQL and secure API requests via cURL.🖌️ Web & Email DevelopmentCreated and optimized web and email content for internal and external communications.🗂️ Project ManagementOversaw and managed web-related side projects, ensuring they aligned with organizational goals and timelines.🎤 Internal SpeakerLed discussions and presentations in internal meetings, sharing insights and updates on web development projects and best practices.🔮 Internal Web ConsultantServed as a go-to consultant for web solutions within the organization, providing guidance on web technologies and development strategies.

Education record

🗼 Front-End Development Experience with JavaScript frameworks, libraries, and tools for interactive web applications, including React.

Entrepreneurship

The ETENA program at the University of Strasbourg fosters entrepreneurship among students and recent graduates. It offers resources.