Backend Engineer, Experiments Platform

HiveMQ is seeking a skilled software engineer to join its development team in Madrid. The role involves architecture, development, and maintenance of the HiveMQ platform for large IoT deployments, ensuring high scalability and availability. Candidates should have over 5 years of experience in backend development, strong skills in Git, and familiarity with...

Ebury seeks Senior Staff/Lead Backend Engineers to join the Client Ops team in Málaga or Madrid. You will design and operate reusable backend services in Python or TypeScript, own data contracts, and drive migrations away from Salesforce. You will contribute across end-to-end delivery, tackle complex domain logic, and push for scalable, cloud-native...

Pluxee is seeking a Senior Backend Engineer to design, build and optimize robust backend services that power our global employee benefits platform. You will contribute to a high-performance stack with Type Script, Node.Js and Mongo DB, ensuring reliability, security and maintainability. You will collaborate with product, design and engineering teams to ship...

Senior Backend Engineer, Customer Communications PlatformMadrid OfficeAircall is a unicorn, AI-powered customer communications platform used by 22,000+ companies worldwide to drive revenue, resolve issues faster, and scale customer-facing teams. We’re redefining customer communications by bringing voice, SMS, WhatsApp, and AI together into one seamless...

Aircall is a unicorn, AI-powered customer communications platform used by 22,000+ companies worldwide to drive revenue, resolve issues faster, and scale customer-facing teams. We're redefining customer communications by bringing voice, SMS, Whats App, and AI together into one seamless workspace. Our momentum comes from a simple idea: help teams work smarter,...

T-Systems in Madrid seeks an experienced Cloud Engineer to develop and operate the T Cloud Public platform, focusing on OpenStack-based cloud technologies and customer-oriented delivery.The role emphasizes hands-on work with cloud backend, networking, automation, and collaboration in a dynamic, international team. Hybrid work, flexible hours, and extensive...

Scopely is seeking a Staff Server Engineer to join our new unannounced project in Barcelona on a hybrid basis (three days on-site). You will lead backend features for a large-scale MMO game and collaborate with cross-functional teams. You will mentor engineers, optimize scalable architectures, and uphold code quality. Visa sponsorship and relocation support...

Xe is seeking a senior backend engineer who owns real problems end-to-end, shaping how the team builds from API design and data modeling to service implementation, production reliability and launch.You'll design and run backend services that move money across multi-currency balances, lead cross-functional delivery with product, compliance, and operations,...

Freenow by Lyft is seeking a Backend Engineer in Barcelona to join the Driver Engagement Team. You will shape urban mobility by building scalable services and integrating AI-assisted tooling across the development lifecycle. Work in a cross-functional team, mentor peers, and own features end-to-end. Experience with Kotlin/Java, Spring Boot, and modern...