Senior Backend Engineer (Java / Kotlin) Fast-Growing Global Technology ConsultancyKEY POINTSHybrid, 3 days a week on site in Madrid (North Castellana)Build real time, high traffic systems for one of the biggest names in global travel techFull ownership of core backend services in Java and Kotlin International,Kotlin from a personal project counts, no need for years of it commerciallySalary up to €65,000, with flexibility for exceptional candidatesABOUT THE CLIENTWe are supporting a fast-growing global technology consultancy, in triple digit growth, that builds software for some of the biggest brands in the world. For this role you would be building for one of the largest names in integral travel technology, on distributed systems that millions of people rely on.This is an environment where engineers have genuine ownership and real impact, working in a small, high-calibre international team. If you love building scalable backends at real scale and want to be a builder rather than a cog in a machine, this is for you.THE ROLE, SENIOR BACKEND ENGINEERAs a Senior Backend Engineer,



you will design, build and own core backend services in Java and Kotlin, working on real time, high traffic systems where performance and reliability genuinely matter.This is a hands-on role in an international team, building and owning your own work rather than maintaining someone else's legacy.KEY RESPONSIBILITIESDesign and build core backend services in Java and Kotlin Work on real time, high traffic, distributed systems Design scalable API access patterns and integrations between distributed services Work with SQL and NoSQL data storage to meet data requirements Test, monitor and debug your own code to a high standard Collaborate with an international team to deliver robust, scalable solutionsESSENTIAL EXPERIENCEAround 4 to 7 years in backend software development within a team environmentStrong JVM experience, Java with Kotlin (commercial or from a personal project, both count)Experience with

📌 Back End Developer (Madrid)
🏢 Global Technology Consultancy
📍 Madrid