StaffSoftwareEngineer,Fullstack(ACF)

## Accountabilities Design and build end-to-end fullstack features, including frontend interfaces, backend services, and APIs supporting a large-scale public digital platform. Engineer and optimize LLM-powered capabilities such as RAG pipelines, semantic search, prompt design, embeddings, and agent-based workflows to ensure accurate and safe outputs. Develop accessible, secure, and Section 508–compliant user interfaces and systems that meet federal standards and serve diverse user needs. Evaluate, monitor, and improve the reliability, safety, and quality of AI-driven interactions to ensure trustworthy user experiences. Build and maintain secure, compliant software systems aligned with federal security requirements and best practices in vulnerability prevention. Collaborate in a cross-functional environment with product managers, designers, researchers, and engineers to deliver iterative, user-centered solutions. Mentor peers and contribute to engineering excellence through best practices in testing, CI/CD, system design, and scalable architecture. Requirements: Strong experience designing and implementing RAG-based LLM systems, including semantic search and knowledge-grounded generation. Proven ability to design and optimize multi-step LLM/agent workflows for data retrieval, refinement, and synthesis. Hands-on experience with prompt engineering, embedding models, and improving LLM response quality and reliability. Strong fullstack engineering skills with the ability to write clean, reusable, and well-tested code across frontend and backend systems. Solid understanding of system design, data modeling, and distributed systems with attention to performance, scalability, and reliability. Experience working in cross-functional, iterative product teams with a strong user-centered engineering mindset. Familiarity with secure software development practices and awareness of compliance and vulnerability mitigation techniques. Bonus: experience with Python, FastAPI, LangChain,