Hugo Guyonnet, Developer in Paris, France
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Hugo Guyonnet

Verified Expert  in Engineering

Full-stack Developer

Location
Paris, France
Toptal Member Since
April 14, 2021

Hugo is a full-stack engineer with nine years of experience specializing in JavaScript. He has exceptional programming skills and is proficient with diverse technologies and software solutions. With keen attention to detail and strong problem-solving skills, Hugo is a focused and passionately driven professional.

Portfolio

ThorFi
JavaScript, TypeScript, Web3.js, Ethers.js, Smart Contracts...
Upshot
JavaScript, TypeScript, React, Next.js, Web3.js, GraphQL, Apollo, HTML, CSS...
Hubwoo
JavaScript, HTML, CSS, React, Redux, jQuery, Bootstrap, Figma...

Experience

Availability

Full-time

Preferred Environment

Slack, Microsoft Teams, Linux, Windows, Visual Studio Code (VS Code), Jira, Trello, Asana, Agile

The most amazing...

...thing I've developed is a responsive front end with high performance and scalability despite the complex graphic design that was provided.

Work Experience

Full-stack Engineer

2022 - 2023
ThorFi
  • Integrated Web3 with the smart contracts deployed on Avalanche on the back end with ethers.js and web3.js.
  • Worked on integrating wallet and smart contract transactions on the front end with web3.js.
  • Integrated the front-end UI/UX with React Hooks and styled-components.
  • Built back-end RESTful services and on-chain indexing integration through the Graph subgraphs.
  • Implemented high-performance and beautiful front-end components and pages in collaboration with UI/UX designers.
Technologies: JavaScript, TypeScript, Web3.js, Ethers.js, Smart Contracts, Amazon Web Services (AWS), Node.js, HTML, CSS, React, API Integration, Styled-components, GRAPH, Subgraph, Web 3.0, Next.js, CI/CD Pipelines, Unit Testing, Integration Testing, Testing, Scrum, Non-fungible Tokens (NFT), Startups, Front-end, WebSockets, Full-stack, AWS Lambda

Front-end Engineer

2021 - 2022
Upshot
  • Developed a UI library for a web application with Storybook, TypeScript, Theme UI, and React.
  • Built front-end pages with Next.js and TypeScript and integrated front- and back-end communication through Apollo GraphQL.
  • Integrated a MetaMask wallet connection with web3.js authentication based on the wallet address.
  • Collaborated with graphic designers to implement their designs in responsive front-end pages.
Technologies: JavaScript, TypeScript, React, Next.js, Web3.js, GraphQL, Apollo, HTML, CSS, Storybook, Figma, NPM, Yarn, User Interface (UI), Ethers.js, Web 3.0, React Apollo, Unit Testing, Integration Testing, Testing, Scrum, Non-fungible Tokens (NFT), Startups, Front-end

Full-stack Engineer

2019 - 2020
Hubwoo
  • Supported the migration of an existing application to React.
  • Added front-end and back-office dashboard pages with React and MUI.
  • Collaborated with designers and back-end developers to build Restful API endpoints and microservices.
  • Mentored junior team members and onboarded new team members.
Technologies: JavaScript, HTML, CSS, React, Redux, jQuery, Bootstrap, Figma, Amazon Web Services (AWS), Node.js, Material UI, RESTful Development, REST APIs, RESTful Microservices, Dashboards, APIs, Tailwind CSS, Next.js, Unit Testing, Integration Testing, Testing, Scrum, Front-end, Full-stack

Software Engineer

2017 - 2019
Cosmian
  • Implemented a responsive, pixel-perfect, and smart UI/UX with React.
  • Wrote clean and readable code, performed code reviews, and merged pull requests.
  • Wrote unit and end-to-end tests with Jest and Cypress.io.
  • Built an internal data analytics dashboard with JavaScript and React.
  • Integrated Google Maps, Mapbox, and other third-party APIs.
Technologies: JavaScript, TypeScript, React, Redux, Google Maps, Redux-Saga, Bootstrap, HTML, CSS, Jest, Cypress, GraphQL, Node.js, Material UI, API Integration, Responsive UI, Code Review, Dashboards, Mapbox, APIs, Unit Testing, Integration Testing, Testing, Scrum, Front-end, Full-stack

Front-end Engineer

2014 - 2017
La Forge
  • Built graphics and data tables with JavaScript, jQuery, and D3.js.
  • Integrated APIs with back-end endpoints and cloud APIs.
  • Updated UI components and troubleshot production issues.
  • Built JavaScript modules and libraries for the front end.
Technologies: JavaScript, TypeScript, jQuery, HTML, CSS, Slack, D3.js, API Integration, APIs, Unit Testing, Integration Testing, Testing, Scrum, Front-end

Upshot

https://upshot.xyz
Focused mainly on building front-end responsive and beautiful pages and components. My deliverables included a custom components library with React and Storybook, mobile responsiveness, and browser compatibility implementation throughout the application.

ThorFi

https://thorfi.io/
ThorFi is a dynamic ecosystem of gamified utilities built on the Avalanche blockchain.

I delivered these integrations:
• Web3 with the smart contracts deployed on Avalanche on the back end with ethers.js and web3.js.
• Wallet and smart contract transactions on the front end with web3.js.
• The front-end UI/UX with React Hooks and styled-components.

Pickle

Pickle is an AI company that provides audio transcription, conversation summaries, and other services. I worked as a front-end developer on this project for 6+ months. I built most landing pages and front-end components with React and MUI. One of my focus areas was customizing the MUI components.
2010 - 2014

Bachelor's Degree in Computer Science

Strasbourg University - Strasbourg, France

Libraries/APIs

jQuery, React, Google Maps, Node.js, Vue, Vuex, Web3.js, Redux-Saga, REST APIs, Google Maps API, D3.js

Tools

Slack, Git, GitHub, GitLab, Jira, Figma, NPM, React Apollo, Redux Toolkit

Frameworks

Redux, Bootstrap, Jest, Material UI, Nuxt.js, Next.js, Angular, NestJS, Laravel, Symfony, Cypress, Yarn, Tailwind CSS

Languages

JavaScript, TypeScript, HTML, CSS, SCSS, SQL, GraphQL, PHP

Paradigms

Testing, Unit Testing, Scrum, RESTful Development

Platforms

Visual Studio Code (VS Code), AWS Lambda, Amazon Web Services (AWS), Twilio, Mapbox

Storage

PostgreSQL

Other

CI/CD Pipelines, Storybook, Ethers.js, Smart Contracts, Styled-components, GRAPH, Subgraph, Web 3.0, Integration Testing, Data Visualization, Non-fungible Tokens (NFT), Startups, Front-end, Full-stack, WebSockets, RESTful Microservices, API Integration, Mapbox SDK, Responsive UI, Code Review, Dashboards, APIs, Apollo, User Interface (UI), Ethereum Smart Contracts

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