Design, build, and maintain Node.js backend microservicesDevelop and maintain REST APIs and event-driven servicesImplement authentication & authorization (JWT, OAuth2, OIDC)Integrate with external systems (CIAM, CRM, ERP, payment, analytics)Work with databases (MongoDB/Cosmos DB/SQL) and caching (Redis)Build asynchronous workflows using message queuesEnsure performance, scalability, security, and reliabilityImplement logging, monitoring, and observabilityCollaborate with product, frontend, QA, DevOps, and architecture teams 5–10+ years of backend development experienceStrong hands-on experience with Node.js & TypeScriptExperience in microservices architectureREST API development & API security best practicesAzure Cloud experience (APIM, Service Bus, Cosmos DB, Key Vault)Experience with Docker & Kubernetes (AKS)Knowledge of CI/CD pipelinesStrong understanding of asynchronous programmingLoyalty / rewards domain experienceCIAM platforms (SAP CDC / Gigya)High-scale performance tuning & cachingKnowledge of PCI, PII, GDPR compliance