Marfeel is a publishing platform that revolutionizes the way publishers create, optimize and monetize mobile websites. Over 850 publishers, including USAToday, Euronews, and El Confidencial use Marfeel to serve a billion mobile sessions, every month. We take a Technology-First approach and have a commitment to developing new tools for digital publishers to reach their audience. Our innovative technology, including PWAs, SEO and engagement tools, monetization and experimentation makes us proud of what we can offer to our clients: Confidencial speeds, greater performance, and worldwide distribution.Our team now has more than 190 members, made up of over different nationalities. With headquarters in Barcelona and offices in New York and Bogotá, our people and our diversity are the reason behind our world-class product, and we're still growing.The role:We are looking for a Senior Java Engineer to join our core product team, responsible for the backend system infrastructure which gives service to 1 billion monthly mobile sessions. We are continually evolving our architecture and we love tackling the challenges that this involves, such as high concurrency and performance, always keeping our focus on quality and coding standards.This is what you will do:- Work on challenging developments, involving high concurrency and affecting millions of users.- Use up-to-date technologies like modern versions of Java and Spring, Docker, Kubernetes, Microservices.- Work with automated environments with continuous delivery based on Jenkins and AWS, instrumented deployments.- Work in an agile environment with weekly sprints, following iterative development and focused on quality and performance.