Overview We 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 Senior Backend Engineer 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. This is a high-impact role for someone who thrives on elevating engineering standards, and driving a forward-thinking, AI-first approach across the organization. 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.Responsibilities Developing 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-membersRequirements 5+ 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 mannerUsing AI tools such as Junie/Cursor (nice to have)Benefits 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.
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