Overview In this role you will build and maintain backend services at scale for Marfeel’s analytics platform. You will own architectural decisions and collaborate with product and data teams to deliver reliable, high-performance APIs and data processing capabilities. You’ll work with large-scale data, real-time and historical datasets, and leverage AI coding tools to accelerate delivery. This is a hands-on position in a small, high-ownership team focused on new product initiatives and growth for publishers worldwide.

Compensaciones / Beneficiosremote, hybrid or office-based workhome office equipment supportflexible hours and early Friday finishhealth insurance for you and partner/familytraining platforms and coursesreferral bonus ResponsabilidadesDesign, build and maintain backend services using Node.jsWork with large-scale data systems (ClickHouse and other relational/non-relational databases)Build and maintain APIs powering the analytics product across real-time and historical datasetsEnsure services are performant,



scalable and maintainableContribute to architectural decisions for new product featuresWork in Agile sprints and collaborate with product, data and frontend teams Requisitos principales5+ years of production backend experienceStrong proficiency in Node.js and TypeScriptRelational and non-relational databases such as MySQL, MongoDB, ClickHouse or similarDeep understanding of API design, data modeling and web architecturePerformance-focused: query efficiency, latency, and scaleExperience using AI coding tools (Claude Code, Cursor, Copilot) as part of developmentCI/CD and cloud deployments (Docker, GitHub Actions, Jenkins)Ownership mindset and ability to handle complex technical problemsExperience with testing practices (unit, integration, end-to-end)Proficiency in Spanish and Englishownership and accountabilitycollaboration across product, data and frontend teamsproblem solving and analytical thinkingNode.jsTypeScriptMySQL

📌 Backend Engineer (Barcelona)
🏢 Jobrapido
📍 Barcelona