Senior Sofware Engineer (Java OR python and React and Typescript and AI)

Total IT exp. Must be at least 10 years or more, looking for a Lead candidate  Strong experience in JAVA OR Python and FastAPI for backend development. Proficient in React and TypeScript for building modern, scalable frontend applications. Hands-on experience with AI-powered applications, including Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), prompt engineering, and LLM orchestration tools/frameworks. Experience designing and integrating AI solutions into production-ready applications.Senior Software EngineerLong ContractSan Ramon, CA (5 days a week onsite)We're looking for a senior engineer to own and extend the platform that powers customer support operations, an AI-driven Python/FastAPI service connecting Gladly, Sierra AI, Zoho CRM, and Shopify.What you'll build:- AI conversation classification pipelines using OpenAI GPT-4o, AWS Bedrock, and sentence embeddings (BGE/SentenceTransformers)- Event-driven serverless backend on AWS Lambda + SQS- Integrations with Gladly, Sierra AI, Shopify (GraphQL + REST), Zoho CRM, and SimpleSat- Analytics reporting via New Relic NRQL with a React/TypeScript dashboards- Develop and Maintain Gladly Configurations and customizations and build tools to help agents- develop, configure & test AI agent to interact with customer queries.Required skills:- Python FastAPI, async/await, Pydantic, pytest- AWS Lambda, SQS, DynamoDB, Secrets Manager- LLM integration OpenAI SDK, AWS Bedrock, prompt engineering- Sentence embeddings & semantic similarity (SentenceTransformers, cosine scoring)- SaaS REST API integrations (Gladly, Shopify, or similar)- React + TypeScript