[VCK] Backend Developer (Python + AWS)

About the Project Nimbus Data Systems is building a private, tenant-isolated AI assistant for the real estate title and settlement industry. The platform is a retrieval-first (RAG) system that ingests historical email, documents, and structured metadata into a per-tenant vector index, and serves grounded, cited, expert-weighted answers through a chat-style Q&A interface with single sign-on and full audit logging. The platform is AWS-native with a Python/FastAPI backend, Vue.js frontend, OpenSearch/Pinecone vector store, and OpenAI/Anthropic/Bedrock as LLM provider. You will join a senior, cross-functional LATAM-based team where hands-on AI delivery experience not just familiarity is the baseline expectation. Your Responsibilities Build and maintain the BFF/Backend API layer (Python/FastAPI, ECS/Lambda). Implement SSO / identity provider integration and the tenant-based authentication schema (AWS Cognito). Build the audit logging layer, from minimal dev logging through to full document lifecycle tracking. Develop core API services supporting the chat Q&A interface and retrieval orchestration. Integrate with AWS services: API Gateway, Cognito, DynamoDB, S3, CloudWatch. Write unit and integration tests; support the QA Automation Engineer with testable, documented service contracts. Participate in code reviews and contribute to maintaining backend code quality standards alongside the Tech Lead. Must-Have Skills & Experience 3+ years in backend software development. Proficient in Python; FastAPI or Flask experience preferred. Experience with AWS serverless and container services: Lambda, ECS, API Gateway. Experience with DynamoDB / S3. Familiarity with SSO/OAuth 2.0/OIDC patterns; AWS Cognito or equivalent identity provider integration experience. Understanding of API design principles, audit logging patterns, and secure data handling. Comfortable working in agile/scrum teams with Jira. Nice-to-Have Exposure to RAG or LLM-integrated backend systems working alongside AI pipeline components. Experience with multi-tenant application architecture and tenant-scoped access control patterns. Familiarity with structured audit logging for compliance or regulated-data use cases. We are accepting applications from LATAM countries We are Nimbus Data Systems , an awesome team of engineers who are ready to ramp up any top-notch company’s projects! Our aim? To always be one step ahead. Become part of a multicultural company in constant growth with an excellent work environment certified by Great Place To Work! Originally posted on Himalayas