3 weeks ago Be among the first 25 applicantsYOUR MISSIONWe are looking for an experienced Senior Backend Engineer to expand and optimize our digital advertisement SaaS suite of applications. Using technologies such as NodeJS with TypeScript, NestJS federated GraphQL, Docker, AWS and Apache Kafka, you'll be designing microservices and other back-end components, and integrating data storage, monitoring and protection solutions. Your primary focus will be the development of all server-side logic, definition and maintenance of central databases and message busses, and ensuring high performance and responsiveness to requests from the front-end. Additionally you'll conduct regular code reviews, provide guidance to other team members, and contribute to workload estimations, project planning and architecture discussions. You will join a cross-functional team under a Product Owner to contribute to our multi-tenant SaaS product and ad-serving network. To ensure success as a Senior Backend Engineer at Factor-Eleven, you should possess extensive knowledge of NodeJS based services, good knowledge of AWS and / or Kafka, great knowledge of GraphQL / REST-APIs and experience in a similar role. An accomplished SBE will be someone whose expertise results in the stable, fast, and secure exchange of data between servers and end-users, and who successfully shares that expertise with the wider team. Ultimately, a top-class Backend Engineer at F11 should be able to envision, plan, develop, test and deliver scalable microservices in an event-driven multi-tenant architecture, and teach others to do the same.Your ResponsibilitiesDeveloping and maintaining microservices and back-end componentsEnsuring optimal performance of databases and responsiveness to front-end requestsCollaborating with developers, product owners and stakeholders on the design and integration of elementsDeveloping high-performance applications by writing testable, reusable, and efficient codeImplementing effective security protocols, data protection measures, and storage solutionsRunning diagnostic tests, repairing defects, and providing technical supportDocumenting server-side processes, including database schemas, message events and sagas, as well as preparing reportsRecommending and implementing improvements to processes and technologiesProvide mentorship and technical supervision to team-membersRequirementsYOUR PROFILE5+ years experience as Backend Engineer or similar roleStrong proficiency of NodeJS with TypeScript, web stacks, libraries, and frameworksWorking knowledge of front-end technologies such as HTML5 and CSS3Experience with user authentication and authorization between multiple systems, servers, and environmentsHigh familiarity with fundamental design principles behind scalable applicationsCreating database schemas that represent and support business processesGood knowledge of event-driven architecture, message busses, and / or pub / sub-systemsProven expert knowledge Implementing automated testing platforms and unit testsSuperb interpersonal, communication, and collaboration skillsExcellent familiarity with git, npm, docker and JiraExtensive experience in mentoring teammates in a respectful, educative mannerWHY US?Factor Eleven's tech department is the inhouse tech scale-up responsible for our SaaS product suite offering localized digital advertising to enterprises of all sizes and shapes. We're powering the engine that Factor Eleven is successfully built upon and elevate the possibilities of our product on a daily basis. We're working together to fulfill our ambitions as a top ad-tech provider by continuously leveling up the quality and expanding capabilities of the entire platform, as well as our engineering and product organization.Join our amazing team in our mission to move digital localized advertisement forward and enjoy the freedom, camaraderie and perks of our fully remote operations.Transparent, above-market salaries100% remote within EuropeFlexible work-hours and part-time modelsBe part of a fast-growing, highly-skilled teamIn person department and company eventsHome office, co-working space and work-together allowancePersonal and professional development courses from UdemyCase by case relocation and visa supportPlease note that you need to be residing in and hold a work permit of a country in the European Union to be considered for this role. Seniority levelSeniority level Mid-Senior levelEmployment typeEmployment type Full-timeJob functionIndustries IT Services and IT ConsultingReferrals increase your chances of interviewing at F11 by 2xGet notified about new Back End Developer jobs in Spain .Python Backend Junior Software Engineer - Remote 4 days a week (Europe) Python Backend Junior Software Engineer - Remote 4 days a week (Europe)Barcelona, Catalonia, Spain $30,000.00-$40,000.00 3 weeks agoPython Backend Junior Software Engineer - Remote 4 days a week (Europe)Madrid, Community of Madrid, Spain $30,000.00-$40,000.00 3 weeks agoMadrid, Community of Madrid, Spain 1 year agoMadrid, Community of Madrid, Spain 1 week agoMadrid, Community of Madrid, Spain 1 month agoMadrid, Community of Madrid, Spain €45,000.00-€60,000.00 8 months agoMadrid, Community of Madrid, Spain 1 month agoBackend Python Developer (Build & Release Engineer)Madrid, Community of Madrid, Spain 3 weeks agoMadrid, Community of Madrid, Spain 3 days agoSanta Cruz de Tenerife, Canary Islands, Spain 3 weeks agoWe’re unlocking community knowledge in a new way. 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