Junior Backend Developer - Madrid

The team that makes our magic work is growing: will you be a part of it?About usStockholm HQ with a Madrid R&D center, building a platform so any device with a secure chip can pay, access transit, enter buildings, etc. Fidesmo Pay is their flagship, launched with Visa, Mastercard, banks and wearable makers — powering Swatch Pay and Honor's smartwatch payments. Work spans tiny-footprint chip code up through scalable server code and iOS/Android/web/CLI clients, developed in-house under their own quality bar.Role descriptionBackend team role building the services connecting to payment networks, transit authorities, and secure chips. You'd learn to implement cryptography correctly and manage keys securely in a highly concurrent environment, and take part in CI/DevOps. Agile process — you'd join design/implementation discussions, planning, and code reviews. The expectation is you grow alongside more experienced developers until you own one or more subsystems and contribute to other projects/libraries. Open to experimenting with new tech; they'll train you in the languages, crypto, and domain knowledge needed.RequirementsUniversity degree in computer science, maths, physics, or engineeringComfortable with abstract thinking and complexityWorking knowledge of at least one programming languageSome server-side coding experienceEnjoys collaborative, small-team work with mutual code reviewComfortable working in English day-to-dayNice to haveJava, Kotlin, or Scala experienceDatabase designFunctional programming knowledgeInterest in cryptography and security techWhat's offeredOnboarding with formal + on-the-job training alongside experienced developersCentral Madrid office, well connected by Cercanías/Metro/busFlexible hours and remote workRestaurant tickets25 days annual paid vacationSalary: €24,000–32,000/year depending on experience