Software Engineer SSSGDV1524

• Participate in all Lean Agile scrums, sprint planning, and grooming sessions.
• Consult and coordinate with stakeholders for problem resolution, task scheduling, resource needs, and task clarification.
• Work in partnership with an integrated team of staff and contractors.
• Coordinate and collaborate with security, operations, engineering, testing, and other teams to provide system information and technical support.
• Understand and work within approved cloud environments (e.g., AWS).
• Design, develop, and modify software systems.
• Unit test software and perform code reviews.
• Design and implement scalable search and retrieval systems leveraging Elasticsearch.
• Develop and integrate LLM powered capabilities, including Retrieval Augmented Generation (RAG) pipelines.
• Document and track vendor software roadmaps for software and patch version updates.

• Demonstrated experience working in Lean Agile Development environment.
• Demonstrated experience translating customer and system requirements into actionable design specifications.
• Demonstrated experience designing system interfaces, including defining integration points, data flows, and data exchange workflows.
• Demonstrated experience building or integrating LLM-based solutions, including RAG pipelines, semantic search, and AI-assisted retrieval systems.
• Demonstrated experience designing and implementing data pipelines for hybrid search (BM25 + vector search) in RAG workflows, covering ingestion, chunking, embeddings, and vector retrieval.
• Demonstrated experience with Elasticsearch, included index design and optimization, query development, relevance tuning, and cluster scaling.
• Demonstrated hands-on experience in frontend Single Page Applications (SPA) development using React (hooks), HTML5, CSS3, and modern JavaScript best practices.
• Demonstrated hands-on experience in backend development, including designing and building RESTful APIs with Node.js and Express.js (or comparable modern backend frameworks).
• Demonstrated hands-on experience troubleshooting web protocols and server technologies, including Apache Tomcat, Node.js, Web Services, and SSL/TLS security configurations.
• Demonstrated experience using modern testing platforms such as Jest or Karma.
• Demonstrated experience with DevOps tools including Git, Jenkins, and Nexus.

, Desired Skills

• Experience with the customer’s Lean Agile methodology.
• Experience evaluating, selecting, or integrating LLMs (e.g., OpenAI, open-source models) into enterprise applications.
• Experience with vector databases, hybrid search (keyword + semantic), and relevance optimization.
• Experience with or exposure to RAG, LLM integrations, or semantic search.

Sabree Software Services, Inc. (S3) is a full-service software firm headquartered in Northern Virginia. We support the federal government and commercial arenas by providing high quality, system/software architecture design, full-lifecycle/full-stack software development services, usability engineering, testing, and project management services. Our team is comprised of an elite network of engineers, with advanced degrees, who have been providing technical services to our customers and partners in the DC metropolitan area for over 20 years. We are committed to delivering innovative, multidisciplinary solutions in an agile fashion.