Gatien Delerue

– Delivered projects in JavaScript, Go, and Python for both early-stage startups and large organizations. – Work spans tool automation, application development, and software testing, helping teams improve productivity, reliability, and time-to-market. – Adapted quickly to new environments and technologies. – Comfortable taking ownership of features or systems end-to-end, collaborating with cross-functional teams, and adjusting to evolving technical and business requirements.

Building and maintaining lemlist, a multichannel sales engagement platform. - Designed and shipped end-to-end LinkedIn automation features: new outreach step types, conditional sequence logic, rate limiting, and API migrations - Diagnosed and resolved production issues in the campaign execution pipeline, improving reliability for thousands of active users - Built integrations, background workers, and internal tools across the full stack - Worked in a large monorepo (Meteor, Node.js, React, TypeScript, MongoDB) with feature flags, progressive rollouts, and comprehensive testing

First developer hired post-founding, I designed and built the platform from scratch, from initial architecture to production deployment. - Designed and implemented the complete platform architecture (Next.js, React, GraphQL, Supabase) - Built and maintained 57 integrations with e-commerce, CRM, payment, and accounting platforms (Shopify, MyUnisoft, HubSpot, QuickBooks, Stripe, etc.) - Integrated ChorusPro, the official French government e-invoicing portal - Migrated to a monorepo architecture to structure the growing codebase - Supported the Pennylane acquisition and technical integration into their ecosystem Tech stack: - Frontend: Next.js, React, TypeScript - Backend: Node.js, GraphQL - Database & BaaS: Supabase (PostgreSQL) - Testing: Jest, Vitest - Infrastructure & Hosting: Vercel

– Développement d'une plateforme commerciale de gestion de chantier relatif au monde du BTP – Stack technique : Javascript/Typescript, Node.js, Nest.js, React.js, Docker, Jest / React Testing Library, Storybook, Postgresql, MongoDB

– Travail sur le site Legifrance au sein de la vertical Service Public de Sopra Steria. – Java Spring – Jenkins – ElasticSearch

– Mise en place d'applications avec Java EE – Traitement de donnée de masse avec base de données

– Stage de validation de DUT Génie Électrique et Informatique Industrielle – Informatique Embarquée sur un Raspberry Pi 3. Langage utilisé : Python 3 – Recherche et développement sur le concept d'une table de ping-pong connectée en partenariat avec la Fédération Française Handisport.