Senior Backend Engineer (Java / Kotlin) – Fast-Growing Integral 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 InternationalKotlin 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 global 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 KotlinWork on real time, high traffic, distributed systemsDesign scalable API access patterns and integrations between distributed servicesWork with SQL and NoSQL data storage to meet data requirementsTest, monitor and debug your own code to a high standardCollaborate 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 SQL and NoSQL data storage, scalable APIs and integrations between distributed servicesProduction experience on public or hybrid cloudComfortable testing, monitoring and debugging your own codeYou must already hold the right to work in Spain as a full time employee, as our client is unable to support visa arrangements or sponsorshipWhat’s on OfferSalary up to €65,000, with flexibility for exceptional candidatesThe chance to build for a major travel tech brand inside a consultancy in triple digit growthFull ownership of core backend services in an international, English speaking teamWorking hours Monday to Thursday 09:00 to 18:00, Friday 09:00 to 15:00Hybrid working, 3 days a week on site in Madrid#J-18808-Ljbffr

📌 Back End Developer - Up To €65.000 A Year (Madrid)
🏢 Global Technology Consultancy
📍 Madrid