Senior Back End Engineer (Node.js/TypeScript)

Job Description Ciklum is looking for a Senior Back End Engineer (Node.js/TypeScript) to join our team full-time in the Czech Republic. We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live. About The Role As a Senior Back End Engineer (Node.js/TypeScript), become a part of a cross-functional development team engineering experiences of tomorrow. Responsibilities Take full end-to-end ownership of key features in authentication, authorisation, and identity managementDesign and build high-throughput, distributed backend services using NestJS, TypeScript, Kafka, and RedisWork hands-on with AI tools daily to accelerate development, improve code quality, and explore new capabilitiesContribute to architectural decisions and help shape the technical direction of the platformParticipate in code reviews and give constructive, thoughtful feedback to your teammatesSupport and mentor junior colleagues when the opportunity arises, and share your knowledge openlyCollaborate closely with product, QA, and DevOps teams on a daily basisShow up to stand-ups, planning sessions, and retrospectives with ideas, not just status updates Requirements 6+ years of professional backend engineering experienceStrong, production-grade TypeScript and Node.js skills - must haveProven experience in high-scale, high-throughput production environments (millions of requests per day) - must haveAbility to independently lead feature development from design through to deployment - must haveActive daily use of AI development tools such as GitHub Copilot, Cursor, Claude, or similar - must haveExperience designing and implementing distributed, event-driven architecturesHands-on experience with NestJS, Kafka, Redis, and MySQL in productionComfortable navigating and improving an existing, mature codebase - not just greenfield projectsGood understanding of CI/CD pipelines and release practicesClear, collaborative communication style - someone the team genuinely enjoys working with Desirable Familiarity with authentication and identity standards: OAuth 2.0, JWT, SAML, WebAuthn, or SSOExperience with AWS and cloud-native architecturesBackground in security-sensitive engineering, or prior experience as a security championExperience with designing and integrating large-scale messaging queue servicesMentoring or informal technical leadership experience - the team includes junior engineersInterest in or background with developer tooling, SaaS platforms, or identity infrastructure What’s in it for you? Flexible working hoursHome office option5 weeks of holiday5 sick daysMultisport CardMeal allowanceInternal trainings including workshops and seminarsPaid certifications and technical as well as soft-skills trainingPossibility to participate in international conferencesFresh fruit, coffee, and a weekly company breakfast in the officeLoyalty bonus after 5, 10, 15 and more years with the companyReferral bonus programmeCorporate events including team building, outdoor activities, Christmas party, health week, summer ice cream, and moreHybrid and remote working options available across our Czech offices in Prague, Hradec Králové, and Zlín About Us At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress. With delivery centers in Prague, Hradec Králové, and Zlín, our Czech team delivers end-to-end solutions across industries. Here, innovation thrives through collaboration, and every idea drives our partners' success. Explore, empower, engineer with Ciklum! Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.