2 principal full stack engineer jobs found in Merrimack

Fidelity Investments Job Description: Principal AI Engineer The Role Fidelity Labs is looking for a Full-stack Software Engineer to help us build Generative AI powered applications for investment. You will join a new startup team to apply cutting edge Agentic AI technologies to build exciting new products, from ideation to deployment. What You will Work on Design, build, and integrate agentic applications (LangGraph and/or Google ADK) end-to-end. Develop and maintain APIs with FastAPI and REST best practices. Implement prompt/context engineering for LLM agents. Create indexing and retrieval pipelines (embeddings, vector stores, RAG). Integrate external tools, services, and data sources into agent workflows. Build, connect, and maintain user-facing apps with React and Next.js. Lead UI architecture, state management, and performance optimization. Write clean, tested, production-quality code on both frontend and backend. The Experience and Skills You Bring...

Fidelity Investments Job Description: Note: Fidelity will not provide immigration sponsorship for this position. The Role The Principal Data Modeler designs, implements, documents data architecture, and data modeling solutions that will be used in direct-to-consumer consulting solutions. These solutions support projects involving business intelligence, data as service offerings, Data Cleaning, Client data Ingestion, Data Masking and Data Security and other business interests. Models developed should reduce data redundancy, streamline data movements, and improve Data Consulting information management. Principal Data Modeler will create table designs and structures as well as views, stored procedures, and materialized views. Role Functions Development of conceptual, logical, and physical data models (often large and complex) across multiple platforms and data tools (reporting, visualization, analytics, data transfer and longer-term data science) Leadership of and...