AI/Software Developer

Expression•Washington, DC

1d•Remote

About The Position

Expression is seeking an AI/Software Developer to join our Product Team and drive the evolution of our Agentic AI platform. We are building an enterprise-grade platform for our National Security and Federal Civilian customers that moves Generative AI from 'chatting' to 'doing.” This platform is the intelligent backbone for our semi-autonomous agents and the AI governance framework that manages them. The ideal candidate thrives in a highly technical, collaborative environment and has a strong bias for action. You are comfortable taking ownership, elevating your team through clear communication and solid technical judgment, and continually improving how we build our platform.

Requirements

10+ years of combined professional experience and education in Computer Science, Software Engineering, Information Systems, Data Science, or related fields. An advanced degree is preferred.
Extensive hands-on experience with Agentic AI frameworks like LangChain/LangGraph, Crew AI, Strands, or similar.
Expert-level Python proficiency, including asynchronous programming (asyncio), data validation (Pydantic), and API development (FastAPI).
Proven experience implementing Retrieval-Augmented Generation (RAG) pipelines
Experience designing and operating vector search systems and managing vector databases.
Strong background designing systems architectures for LLM-based applications
Familiarity with containerization and cloud-native environments, specifically using Docker and AWS or Azure services.
Excellent written and verbal communication skills for producing design documents, technical reports, and client-facing presentations.
Secret or Top Secret Clearance Required

Responsibilities

Contribute to the design and evolution of Expression’s Agentic AI platform, influencing: System architecture and core components
Tooling, automation, and coding standards
Performance, scalability, and reliability
Lead or contribute to research and prototyping efforts to explore emerging technologies that could be relevant to Expression products
Collaborate directly with clients and lead product demonstrations showcasing platform capabilities.
Design, implement, and optimize LLM-based services, agent workflows, and orchestration layers.
Build and maintain high-performance, production-grade Python APIs
Collaborate closely with cross-functional teams, including product, UX, and infrastructure
Produce clear technical documentation, architecture diagrams, and design proposals.