If you like challenges and enjoy owning your code from design to production, this position is meant for you. Keep reading! Smadex is a cutting-edge ad-tech company: we process more than 2.5 million ad requests per second, replying under 100ms. Every day we generate several TBs of data that need to be processed, analyzed and aggregated, so our real-time components get smarter every day. We need you to help us keep our platform in motion! This position is based in Barcelona. WHAT ARE WE LOOKING FOR? A Senior Backend Engineer (Java) with hands-on experience in developing complex solutions to join our tech team. Requirements and qualifications: +5 years of software development experience in one or more programming languages such as Java, Node.Js, Python, and HTML. Solid experience with Key-Value stores and in-memory databases (e.G. Redis, Memcached). Strong fundamentals of modern CI/CD frameworks and testing tools. Expertise in Linux, Git, Docker & Docker-Compose and AWS Cloud . Excellent communication skills in English both written and spoken are mandatory. Bonus points: Software development experience in Java / Spring Boot . Design and implementation of low-latency, high-throughput platforms. Please note that we do NOT provide VISA sponsorship. Candidates without a legal permit to work in Spain won't be considered. What will you do at Smadex? Be an advocate of our "You build it, you run it" philosophy: you will own your code from design to production; testing, deploying and monitoring. You will learn from every step in the software development process. Develop and maintain a high-throughput low-latency platform. You have not lived until you fix an error happening 1 million times per second. Improve and optimize real-time components: every millisecond counts. Participate in code reviews, contribute to technical and architectural decisions, collaborate in a fast-paced environment where every opinion counts. Our tech stack is 100% based on AWS, running thousands of instances and containers in 7 different regions. Technologies: Java, NodeJS, Python, Redis, AWS, Nginx, HAProxy, Apache Druid, MySQL, Memcache, Netflix Hollow, and much more :) If you become a member of our team, you will get the chance to: Have a real impact on one of the hottest ad-tech in Barcelona and Europe. Be part of an agile team with a strong focus on innovation and technology, to continue improving your knowledge in the field. Work in a multicultural, young & talented environment with peeps from more than 28 different nationalities! Ticket restaurant - monthly allowance. Flexible working hours. DIR gym membership. LinkedIn Learning. Daily fresh fruits & snacks. TGIF's monthly activities, team-building events, and work anniversary celebrations! If you want to know more about us visit our website Smadex.Com, and for a sneak peek of the cool stuff we build, check this video out. #J-18808-Ljbffr