Software Engineer, AI Engineer (Applied​/Software), Backend Developer

Labor Category:
Software Engineer

Position Title:

Software Engineer
Position Level: Level 1 – Subject Matter Expert
Salary:
Up to $ per year
Core

Hours:

9am to 4pm

Location:

Chantilly VA

Position Requires a Top Secret (TS/SCI) Clearance with a Polygraph. Candidate must have hands-on experience with chatbots integration into search services.

• 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

Labor Category:
Software Engineer

Position Title:

Software Engineer
Position Level: Level 1 – Subject Matter Expert
Salary:
Up to $ per year
Core

Hours:

9am to 4pm

Location:

Chantilly VA

• Developmental (0-2 years’ experience)
• Full Performance (3-5 years’ experience)
• Senior (6-10 years’ experience)
• Expert (11-15 years’ experience)
• SME (16+ years’ 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 CSS
  3.
• 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 Dev Ops 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).

• 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).

B4

Corp is a small defense contracting company that focuses on providing an optimum environment for mission-focused, highly skilled consultants to support the United States of America’s intelligence community and other defense organizations. B4

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B4

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Corp’s benefits reflect the company’s policy of putting the employees first. B4

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