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Software Engineer at Bespoke Technologies. . Location: Chantilly, VA. BT-331 – Software Engineer – SME. . Location: Chantilly, VA. .  . . KEY TASKS:. . . Participate in all Lean Agile scrums, sprints and grooming sessions.. . Consult and coordinate appropriately for problem resolution, task scheduling, new resource requirements, and task clarification.. . Work in partnership with an integrated team of staff and contractors.. . Understand the cloud environments, such as AWS or Azure.. . Coordinate and collaborate with security, operations, engineering, testing and other teams to provide system information and technical support.. . Design, develop and modify software systems.. . Document and track vendor software roadmaps for software and patch version updates.. . Unit test their software and perform code.. . Design and implement scalable search and retrieval systems leveraging Elasticsearch.. . Develop and integrate LLM-powered capabilities, including Retrieval-Augmented Generation (RAG) pipelines.. . .  . . REQUIRED SKILLS AND DEMONSTRATED EXPERIENCE:. . . Demonstrated experience working in Lean Agile Development environment.. . Demonstrated experience building or integrating LLM-based solutions, including RAG, semantic search, or AI-assisted retrieval systems.. . Demonstrated experience developing detailed design and associated deliverables.. . Demonstrated experience translating customer and system requirements into design.. . Demonstrated experience designing system interfaces.. . Demonstrated experience developing Single Page Applications using React (modern hooks-based architecture), HTML5, and CSS3.. . Demonstrated hands-on experience developing RESTful APIs using Node.js and Express (or comparable modern backend frameworks).. . Demonstrated hands-on experience with and troubleshooting of Internet and Web related protocols and technologies such as Tomcat, Nodejs, Web Services, or SSL.. . Demonstrated experience with testing platforms such as Jest or Karma.. . Demonstrated hands-on experience working with DevOps tools such as Git, Jenkins, or Nexus.. . Demonstrated hands-on experience with Elasticsearch (index design, querying, relevance tuning, and scaling).. . Demonstrated experience designing or implementing data pipelines to support search and/or RAG workflows (e.g., ingestion, chunking, embeddings, vector search).. . .  . . HIGHLY DESIRED SKILLS AND DEMONSTRATED EXPERIENCE:. . . Demonstrated recent experience with the Sponsor’s Lean Agile methodology.. . Experience evaluating, selecting, and integrating LLMs (e.g., OpenAI, open-source models) into enterprise applications.. . Experience with vector databases, hybrid search (keyword + semantic), and relevance optimization.. . Ability to lead or mentor teams in adopting search + AI/LLM best practices (strong preference for candidates who can elevate team capability, not just contribute individually).. . .