Thomas Zhou

Wojo provides flexible workspaces including private offices, coworking spaces, and meeting rooms for companies and professionals. I joined the team to contribute to the evolution of its booking and operational tools across web, mobile, backend, and back-office applications. As Full Stack Developer, my responsibilities included: - Refactoring and adapting booking flows across web, mobile, and backend applications - Leading technical discussions, architecture choices, and problem solving across the team - Coordinating delivery with product and project stakeholders to secure key milestones - Supporting the team through code reviews, prioritization, and technical guidance Technical environment: Next.js, Expo, NestJS

FoodFlow is a fast-growing startup specializing in food delivery to restaurants. I built and scaled the mobile application serving 3000 daily users. As Full Stack Developer, my responsibilities included: - Designing and developing the mobile application (React Native/Expo) achieving 99.67% crash-free sessions one month post-deployment - Implementing a multi-account team management system with role-based permissions (Admin, Chef, Accountant) and personalized push notifications - Architecting robust infrastructure: GraphQL codegen configuration, optimistic updates, and securing sensitive endpoints - Onboarding sales team and deploying the staging environment used for commercial demos, improving sales velocity and demo reliability across the entire sales team - Migrating to new TMS (PTV OptiFlow), doubling daily route processing capacity (from 20 to 50+) without performance degradation - Developing and deploying cross-sell functionality resulting in nearly 5% increase in daily revenue Technical environment: Expo, Next.js, Odoo, GraphQL, EAS, Customer.io, Heroku, GCP/AWS, PTV OptiFlow

IzyCardio is a secure mobile application enabling nurses at Cardioparc centers to digitalize patient monitoring in cardiology through dematerialized health questionnaires, optimizing consultation preparation. I was brought in to modernize and unblock the application for production release. As React Native Developer, my responsibilities included: - Conducting technical audit to identify blocking points and define the app upgrade strategy - Unblocking Play Store publication by performing critical migration from React Native 0.67 to Expo 50 - Enhancing security and user experience through biometric authentication implementation - Accelerating bug-fix and iteration cycles by implementing over-the-air (OTA) deployment via EAS, enabling instant updates without store review delays - Resolving critical bugs affecting UI and authentication flows Key achievement: Delivered a production-ready application in 3 months, enabling Cardioparc to finally launch on Google Play Store after months of development stagnation. Technical environment: Expo, TypeScript, TanStack Query, Nativewind, Google Maps, EAS, Azure

Paquerette is a mobile application dedicated to emotional well-being offering personalized audio sessions. I was brought in to take over an unfinished application and prepare it for launch. As React Native Developer, my responsibilities included: - Transforming an unfinished application into a stable production-ready version through targeted refactoring and corrective maintenance - Optimizing performance and reducing technical debt by upgrading key dependencies and refactoring critical code paths - Automating subscriber acquisition by integrating Brevo CRM, enabling direct and reliable synchronization of new subscribers to marketing campaigns - Resolving blocking bugs to ensure a smooth user experience at launch Key achievement: Delivered a launch-ready application in 2 months, enabling Paquerette to successfully release on both App Store and Google Play Store. Technical environment: Expo, TypeScript, Nativewind, TanStack Query, React Hook Form, Supabase, EAS, TestFlight

Kobi is a turnkey solution to improve employees' sports purchasing power and promote their well-being. I joined the Product team (5 people) to expand the partner brand offerings available to employees. As React Native Developer, my responsibilities included: - Taking over legacy codebase and migrating to TypeScript for improved code quality and maintainability - Implementing GraphQL to streamline backend-frontend synchronization and reduce data fetching complexity - Setting up Continuous Delivery pipeline with App Center for automated builds and faster release cycles - Deploying the application on both Play Store and App Store from A to Z - Collaborating with backend team to define and optimize API contracts Key achievement: Successfully modernized the codebase and established automated deployment processes, reducing release time and improving developer experience for the entire team. Technical environment: React Native, TypeScript, Zustand, GraphQL, Google Maps, Firebase, AppCenter, Fastlane

Mark Copy is an AI-powered writing platform that generates high-quality content in just a few clicks. It simplifies the content creation process for blogs, documents, and various text formats through automated suggestions and drafting. I was brought in to improve the user onboarding experience and contribute to the design system. As Next.js Developer, my responsibilities included: - Redesigning the user onboarding flow to improve conversion rates and reduce drop-off Integrating NextAuth.js for secure and streamlined authentication - Developing UI components for the design system with Storybook for better consistency and reusability across the platform Key achievement: Enhanced the onboarding experience, making it more intuitive for new users to start generating content quickly. Technical environment: Next.js, TypeScript, Material-UI, Storybook

Metroscope provides software solutions to energy production sector clients for understanding energy losses and industrial equipment failures. Metroscope is part of the EDF Group. I joined the Product team (6 people) to implement the migration to a new version of the product. As React Developer, my responsibilities included: - Displaying symptoms based on analyses from on-site sensors to help identify equipment issues - Building a design system with Storybook in preparation for a new product team, ensuring UI consistency and component reusability - Implementing timezone support across the web application to accommodate international clients - Developing new features using React hooks to enhance user experience - Collaborating with backend team to integrate complex data visualization using Highcharts Key achievement: Successfully established the foundation of the design system, enabling faster feature development and better collaboration between design and development teams. Technical environment: React, TypeScript, React Query, Linaria, Highcharts, Storybook 6, io-ts

Shine offers a banking solution specifically designed for small businesses. From creating your legal status to accounting, including invoices, contracts, and contributions. I joined the Copilot team (8 people) to simplify the administrative life of over 100,000 freelancers and entrepreneurs. As React Developer, my responsibilities included: - Migrating legacy code to TypeScript for improved type safety and code maintainability - Adding accounting export functionalities on both web and mobile platforms - Implementing multi-user management features to reach larger companies with multiple employees, enabling Shine's expansion into the B2B market - Reducing technical debt through systematic refactoring and design system improvements - Collaborating with cross-functional teams to ensure feature consistency across platforms Key achievement: Contributed to Shine's strategic expansion toward larger companies by delivering the multi-user management system, opening new market opportunities beyond solo entrepreneurs. Technical environment: React, React Native, TypeScript, GraphQL, Node.js

Senz translates your ideas from a sketch into a digital prototype using machine learning. I joined a team of 3 people to enhance the platform's UI library and expand framework support. As Vue/React Developer, my responsibilities included: - Implementing a new UI library with Storybook for better component documentation and consistency - Integrating new login design to improve user authentication experience - Adding React support to the code generator, expanding the platform's capabilities beyond Vue - Updating the website using the new UI library for a more cohesive user experience Key achievement: Successfully expanded the platform's framework support by adding React to the generator, enabling a broader range of developers to use the tool. Technical environment: Vue, Vuex, Vuetify, React, Ant Design, Storybook

Live for Good is a non-profit organization that supports young social entrepreneurs in creating positive impact projects. I was brought in to rebuild their institutional website with modern technologies. As React Developer, my responsibilities included: - Implementing pixel-perfect integration of the new design using Gatsby.js - Developing responsive pages and reusable UI components with styled-components and Material-UI - Collaborating with the design team to ensure fidelity to mockups and optimal user experience - Optimizing website performance for faster loading times Key achievement: Successfully delivered a modern, responsive institutional website that improved the organization's online presence and communication with young entrepreneurs. Technical environment: Gatsby.js, React, styled-components, Material-UI

Crowdaa provides a no-code platform to build and publish "community applications." I joined a team of 5 people to develop new features and improve the platform's architecture. As React Developer, my responsibilities included: - Developing new features using microservices architecture with AWS Lambda - Improving UX/UI by fixing critical bugs and enhancing user interactions - Updating outdated dependencies to ensure platform stability and security - Migrating React code to Hooks for better code readability and maintainability - Optimizing application performance and reducing technical debt Key achievement: Successfully modernized the React codebase through Hook migration, improving code quality and making future feature development more efficient for the team. Technical environment: React, Cordova, Node.js, AWS Lambda