Mendrika Rahelison

• Integrated APIs within a microservices architecture, including user and service-to-service authentication via OAuth2 and JWT, with Redis-based rate limiting. • Integrated Stripe payments and set up an abnormal transaction detection system based on ClickHouse and Prometheus. • Developed a shared JS/Python package for centralized translation of API error messages across the services and the frontend. • Set up a GitLab CI/CD pipeline to automatically publish a new version of the package on every tag. • Migrated a V-IBAN management service from Python to Java. Skills: Next.js · FastAPI · Spring Boot · PostgreSQL · Stripe · Docker · Redis · GitLab CI/CD · ClickHouse · OAuth2 · Prometheus

• lencre.fr: migrated the website from WordPress to Next.js, building the cart, the checkout flow including discounts and shipping fees, order tracking, advanced search with Algolia and Gemini AI, and order-related email notifications. • objectif-ofp.org: migrated the back office, originally in native PHP, to Next.js and Strapi, with an event booking system, online payment, PDF invoice generation, a KPI dashboard tracking registrations and revenue, and automatic badge generation with Puppeteer. • Yacht dealership CRM: migrated from Bubble to NestJS and Next.js, with customer contact management, showroom appointment booking and role-based authentication. • Occasional missions continued until August 2026. Skills: Next.js · NestJS · Strapi v4 & v5 · PostgreSQL · Stripe · Algolia · Tailwind CSS · Docker

• Developed an AI-powered CMS application with Next.js, Strapi v5 and Algolia. • Implemented authentication with Strapi Auth and a drag-and-drop system (dnd-kit) for dynamic page building. • Integrated the Tiptap editor for content management and connected it to the backend APIs. Skills: Next.js · Strapi v5 · PostgreSQL · Algolia · Tailwind CSS · Husky · Dnd-kit · TypeScript

• Contributed, within a development team, to a web application for monitoring plantations and agricultural plots for a client in the agroforestry sector. • Set up the technical skeleton in TypeScript and the Passport.js authentication system for an HSSE management application intended for an industrial group. • Developed a safety assessment quiz (MCQ) module with automatic score calculation, used to verify knowledge of safety instructions before field interventions and to keep evidence in case of an incident. • Developed a staff management module: attendance tracking and automatic generation of badges in PDF format. • Integrated an authentication system and an appointment booking module between practitioners and patients for a healthcare platform. Skills: React.js · Express.js · MySQL · Material UI · Tailwind CSS · TypeScript

• Took part, within a development team, in migrating a video game e-commerce website to Next.js. • Integrated new mockups and made the frontend dynamic based on the provided designs. • Worked directly with the client to adjust the integrations according to their feedback. Skills: Next.js · TypeScript

• Took part in an international collaborative program supervised by senior developers, aimed at strengthening teamwork skills. • Contributed, within a team of developers, to a hotel room booking system. • Implemented the authentication system with Passport.js. • Integrated online payment with the Stripe API. Skills: React.js · Node.js · Express.js · Passport.js · Stripe