Job Description
Locations: McLean, Virginia
Categories: Engineering
Req ID: 9620
Clearance Level: ['Top Secret/SCI with Poly']
Overview
We are seeking an experienced Full Stack Software Engineer to design, develop, integrate, and maintain modern web applications and AI-enabled capabilities.
This role will support the development of scalable LLM-powered solutions, Retrieval-Augmented Generation (RAG) pipelines, Elasticsearch search capabilities, RESTful APIs, and React-based user interfaces within an Agile development environment.
What will you do?
- Design, develop, modify, test, and maintain scalable software applications and systems.
- Develop and integrate LLM-powered capabilities, including Retrieval-Augmented Generation (RAG) solutions.
- Design and implement scalable search and information retrieval solutions using Elasticsearch.
- Build data pipelines supporting hybrid search, including BM25 and vector-based retrieval.
- Develop workflows for data ingestion, document chunking, embeddings, indexing, and vector retrieval.
- Design and develop responsive Single Page Applications (SPAs) using React, HTML5, CSS3, and modern JavaScript.
- Design and develop backend services and RESTful APIs using Node.js and Express.js or comparable technologies.
- Design system interfaces, integration points, data flows, and data exchange workflows.
- Translate customer and system requirements into actionable technical designs and software solutions.
- Perform unit testing, participate in code reviews, troubleshoot application issues, and maintain software quality.
- Support web and server technologies, including Apache Tomcat, Node.js, Web Services, and SSL/TLS.
- Develop and maintain solutions within approved cloud environments, including AWS.
- Participate in Lean Agile ceremonies, including scrums, sprint planning, backlog grooming, and other development activities.
- Collaborate with security, engineering, operations, testing, and other technical teams.
- Coordinate with stakeholders to resolve technical issues, clarify requirements, identify resource needs, and support project execution.
- Utilize Git, Jenkins, and Nexus to support source control, CI/CD, build, and deployment activities.
- Track vendor software roadmaps, releases, patches, and version updates.
- Develop and maintain appropriate technical and system documentation.
Do you have what it takes?
- Active TS/SCI with Polygraph
- Demonstrated experience working within a Lean Agile software development environment.
- Experience translating customer and system requirements into detailed technical and design specifications.
- Strong experience designing system interfaces, integration points, data flows, and data exchange workflows.
- Hands-on experience building or integrating LLM-based applications, including:
- Retrieval-Augmented Generation (RAG)
- Semantic search
- AI-assisted information retrieval
- Experience designing and implementing hybrid search pipelines combining BM25 and vector search.
- Experience with data ingestion, document chunking, embeddings, vector retrieval, and RAG workflows.
- Strong experience with Elasticsearch, including index design and optimization, query development, relevance tuning, and cluster scaling.
- Hands-on front-end development experience using:
- React, including Hooks
- HTML5
- CSS3
- JavaScript
- Hands-on backend development experience designing and developing RESTful APIs using Node.js and Express.js or comparable backend technologies.
- Experience troubleshooting web protocols and server technologies, including Apache Tomcat, Node.js, Web Services, and SSL/TLS configurations.
- Experience with modern JavaScript testing frameworks such as Jest or Karma.
- Experience with DevOps and software development tools including Git, Jenkins, and Nexus.
- Experience developing or supporting applications within cloud environments such as AWS.
- Strong analytical, troubleshooting, communication, and collaboration skills.
