Marfeel is a publishing intelligence platform trusted by over 5,000 publishers worldwide: including Business Insider, Le Figaro, El País and McClatchy. We help publishers turn data into action: understanding what content is working right now, what has performed over time, and what to do next. Our platform gives editorial, SEO, audience, and revenue teams a unified view of their business, spanning real-time dashboards and deep historical analysis, all in one place.Our international team is made up of over 15 different nationalities, with headquarters in Barcelona. We are looking for a Backend Engineer to join a small, high-ownership engineering team working on new product initiatives. You use AI coding tools as a core part of how you work, and you are excited about what that unlocks. You will own backend architecture decisions and work closely with product and data to ship reliable, high-performance services at scale.This is what you will do:Design, build and maintain backend services using Node.jsWork with large-scale data systems,



including ClickHouse and other relational and non-relational databasesBuild and maintain APIs that power our analytics product, working across real-time and historical datasetsEnsure services are performant, scalable, and maintainableContribute to architectural decisions for new product featuresWork in an Agile environment with short, focused sprintsCollaborate closely with product, data and frontend teamsThis is you:5+ years of experience building backend services in production environmentsStrong proficiency in Node.js and TypeScriptSolid experience with relational and non-relational databases (MySQL, MongoDB, ClickHouse or similar columnar databases)Deep understanding of API design, data modeling, and web architectureStrong focus on performance: you think about query efficiency, latency and scale by defaultYou use AI coding tools: Claude Code, Cursor, Copilot or similar, as a natural part of your development workflow, not as an aftertho

📌 Back End Developer Engineer (Cataluña)
🏢 Marfeel
📍 Cataluña