VG Software Engineer 2

Probity Inc.; Chantilly (VA); On-site; USD 120,000 - 180,000; Full time

Job summary

Probity Inc. seeks a highly skilled software engineer with active Top Secret/SCI clearance to design, build, and scale AI-enabled search systems.

You will collaborate in an integrated team across security, operations, and engineering to deliver advanced software solutions and RAG-powered capabilities. The role requires hands-on experience with React, Node.js/Express, Elasticsearch, and data pipelines, plus cloud familiarity (AWS/Azure).

Qualifications

• 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 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 Elasticsearch (index design, querying, relevance tuning, and scaling).
• Demonstrated experience designing or implementing data pipelines to support search and/or RAG workflows.

Responsibilities

• Participate in Lean Agile scrums, sprints and grooming sessions.
• Consult and coordinate for problem resolution, task scheduling, and resource requirements.
• Work with staff and contractors in an integrated team.
• Understand cloud environments, such as AWS or Azure.
• Coordinate with security, operations, engineering, testing and other teams to provide system information and support.
• Design, develop and modify software systems.
• Document and track vendor software roadmaps for updates.
• Unit test software and perform code reviews.
• Design and implement scalable search and retrieval systems leveraging Elasticsearch.
• Develop and integrate LLM-powered capabilities, including RAG pipelines.

Skills

Lean Agile Development

LLM-based solutions (RAG)

Detailed design deliverables

Requirements-to-design translation

Cloud environments (AWS/Azure)

RESTful APIs

Testing with Jest/Karma

DevOps tools (Git/Jenkins/Nexus)

Elasticsearch indexing & scaling

Data pipelines for search/RAG

Tools

React

Node.js/Express

HTML5/CSS3

Jest/Karma

Git/Jenkins/Nexus

Elasticsearch

Job description

PLEASE NOTE: This position requires an ACTIVE Top Secret/SCI Clearance with Polygraph. To be considered for this position, you MUST have an ACTIVE Clearance Level of Top Secret/SCI with Polygraph

Position Code: 03-SO0709-1

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 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 technologies.
• 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).