Senior Node.js Developer

We are building a large-scale, cloud-native SaaS platform and are looking for an experienced Node.js Developer to join our engineering team. If you enjoy designing distributed systems, working with modern serverless technologies, and solving complex technical challenges, this role is for you. Your tasks Design and build backend services in Node.js/TypeScriptCreate and maintain REST and GraphQL APIsImplement multi-tenant SaaS logic and data isolationDevelop serverless solutions on AWSEnsure platform security, reliability, and performanceCollaborate closely with the engineering team on-site Requirements At least 5 years of experience as a Node.js DeveloperExperience in building large-scale distributed systemsVery good knowledge of TypeScript/Node.jsHands-on experience with AWS serverless architectureExperience with multi-tenant SaaS platforms and account isolation patternsAbility to design APIs (REST + GraphQL)Willingness to work on-site in Gdańsk (working from the office 3 days a week)Fluent Polish requiredResiding in Poland required Job no. JOB-Z6VQX Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws. Benefits For You Great Place to WorkSolid financial situationContracts with the biggest brandsCentre of internal trainingsMany experts you can learn fromOpen and accessible management teamProfit sharingPassion Sponsorship programRegular integration events and tripsComfortable and well-equipped officesMySii appMedical care