At NTT DATA, we are a global team of over 140,000 professionals, operating in more than 50 countries and serving diverse industries including telecommunications, finance, public sector, healthcare, and more. We are passionate about technology and innovation, and we believe in personalized, merit-based career growth.We are hiring a Senior Backend Python Engineer (5+ years of experience) to be part of the development of an AI Retrieval-Augmented Generation (RAG) platform.This role covers ideation, architecture, implementation, testing, and production deployment. The candidate must be highly autonomous, capable of making architectural decisions, and comfortable owning both backend and infrastructure layers in a production AI environment.What You'll Be DoingDesign and implement scalable backend services for a RAG-based systemDesign and develop APIs using FastAPICreate and maintain CI/CD pipelinesContribute to vector storage design and chunking strategiesEnsure testing, reliability, and production readinessProactively propose backend and infrastructure improvementsWhat You'll Bring AlongBachelors or Masters degree in Computer Science, Engineering, or equivalent experienceMinimum 5 years of experience developing microservices5+ years of backend Python development2+ years building APIs with FastAPI2+ years designing and maintaining CI/CD pipelines2+ years managing cloud infrastructure (IAM, databases, compute, networking)Proven experience deploying and maintaining web application backends in productionAbility to work autonomously and take full technical ownershipTesting experience (unit, integration, performance)Observability (logging, tracing, metrics) Grafana, Prometheus, LokiNice to Have: Experience with Generative AI and LLM integrationExperience with vector databases (e.g., Pinecone, Weaviate, OpenSearch, pgvector)Understanding of chunking and retrieval strategiesAWS production experiencePerformance optimization in distributed systemsSecurity best practices for cloud and API-based systemsUnderstand of distributed container based deploymentA proactive and participatory mindsetExcellent command of both spoken and written English