Fantom

Systems integration and IT services, analytics

Full Stack Software Engineer

AI Application Engineering +1Confirmed live in the last 24 hours

Full-timeChantilly, VA, USANo salary listed

About the Job

Requirements

Experience working in Lean Agile software development environments.
Experience developing enterprise software applications throughout the full software development lifecycle.
Experience building AI-powered applications using Large Language Models, Retrieval-Augmented Generation, semantic search, or AI-assisted retrieval systems.
Experience translating customer requirements into scalable technical designs.
Experience designing system interfaces and application architectures.
Experience developing modern Single Page Applications using React, HTML5, CSS3, and JavaScript.
Experience developing RESTful APIs using Node.js, Express, or similar backend frameworks.
Experience troubleshooting web technologies, web services, SSL, and internet-based application protocols.
Experience with automated testing frameworks such as Jest or Karma.
Experience using DevOps tools including Git, Jenkins, Nexus, or similar CI/CD platforms.
Experience designing, deploying, and tuning Elasticsearch environments, including indexing strategies, querying, relevance optimization, and scalability.
Experience designing or implementing data pipelines supporting search, document ingestion, embeddings, vector search, and Retrieval-Augmented Generation workflows.
Must be fully cleared with a recent polygraph.
Strong analytical, troubleshooting, and problem-solving skills.
Excellent written and verbal communication skills.

Responsibilities

Participate in Lean Agile ceremonies, including sprint planning, backlog grooming, daily standups, and retrospectives.
Collaborate with product owners, engineers, operations, cybersecurity, and testing teams to deliver scalable software solutions.
Design, develop, test, and maintain full-stack enterprise applications.
Build modern Single Page Applications using React, HTML5, CSS3, and JavaScript.
Develop RESTful APIs and backend services using Node.js, Express, or comparable frameworks.
Design, implement, and optimize enterprise search solutions using Elasticsearch.
Develop AI-powered search capabilities, including Retrieval-Augmented Generation pipelines and semantic search solutions.
Integrate Large Language Models into enterprise applications to enhance search, knowledge retrieval, and user workflows.
Design and implement data ingestion pipelines supporting search indexing, document chunking, embeddings, and vector search.
Develop detailed technical designs, interface specifications, and supporting documentation.
Collaborate with stakeholders to translate business and mission requirements into technical solutions.
Perform unit testing, integration testing, and code reviews to ensure software quality and reliability.
Track vendor software releases, upgrades, and patch management activities.
Utilize DevOps tools and CI/CD pipelines to automate software development, testing, and deployment.
Support cloud-native application development within AWS, Azure, or similar cloud environments.

Desired Qualifications

Recent experience supporting Agile development within Intelligence Community or other secure government environments.
Experience evaluating, selecting, and integrating commercial or open-source Large Language Models into enterprise applications.
Experience with vector databases, hybrid search architectures, semantic search, and relevance optimization.
Experience leading technical teams or mentoring engineers on AI, search technologies, and modern software engineering best practices.
Experience with cloud-native architectures and enterprise AI platforms.
Experience developing scalable knowledge management or enterprise search platforms.

Fantom Corporation is a mission-focused organization supporting critical programs across the defense and intelligence community. We partner with our customers to deliver high-impact technical solutions while fostering a culture built on trust, expertise, and long-term career growth.

We are seeking a Full Stack Software Engineer to develop next-generation search and AI-powered applications supporting mission-critical operations. This role focuses on designing scalable web applications, developing intelligent search capabilities, integrating Large Language Models (LLMs), and building Retrieval-Augmented Generation (RAG) solutions that enhance data discovery and user experience.

The ideal candidate has experience building modern React and Node.js applications, designing scalable search platforms with Elasticsearch, and integrating AI/LLM technologies into enterprise solutions while working within Agile and DevSecOps environments.

Responsibilities

Participate in Lean Agile ceremonies, including sprint planning, backlog grooming, daily standups, and retrospectives
Collaborate with product owners, engineers, operations, cybersecurity, and testing teams to deliver scalable software solutions
Design, develop, test, and maintain full-stack enterprise applications
Build modern Single Page Applications (SPAs) using React, HTML5, CSS3, and JavaScript
Develop RESTful APIs and backend services using Node.js, Express, or comparable frameworks
Design, implement, and optimize enterprise search solutions using Elasticsearch
Develop AI-powered search capabilities, including Retrieval-Augmented Generation (RAG) pipelines and semantic search solutions
Integrate Large Language Models (LLMs) into enterprise applications to enhance search, knowledge retrieval, and user workflows
Design and implement data ingestion pipelines supporting search indexing, document chunking, embeddings, and vector search
Develop detailed technical designs, interface specifications, and supporting documentation
Collaborate with stakeholders to translate business and mission requirements into technical solutions
Perform unit testing, integration testing, and code reviews to ensure software quality and reliability
Track vendor software releases, upgrades, and patch management activities
Utilize DevOps tools and CI/CD pipelines to automate software development, testing, and deployment
Support cloud-native application development within AWS, Azure, or similar cloud environments

Required Qualifications

Must be fully cleared with a recent polygraph
Experience working in Lean Agile software development environments
Experience developing enterprise software applications throughout the full software development lifecycle
Experience building AI-powered applications using Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), semantic search, or AI-assisted retrieval systems
Experience translating customer requirements into scalable technical designs
Experience designing system interfaces and application architectures
Experience developing modern Single Page Applications (SPAs) using React, HTML5, CSS3, and JavaScript
Experience developing RESTful APIs using Node.js, Express, or similar backend frameworks
Experience troubleshooting web technologies, web services, SSL, and internet-based application protocols
Experience with automated testing frameworks such as Jest or Karma
Experience using DevOps tools including Git, Jenkins, Nexus, or similar CI/CD platforms
Experience designing, deploying, and tuning Elasticsearch environments, including indexing strategies, querying, relevance optimization, and scalability
Experience designing or implementing data pipelines supporting search, document ingestion, embeddings, vector search, and RAG workflows
Strong analytical, troubleshooting, and problem-solving skills
Excellent written and verbal communication skills

Desired Qualifications

Recent experience supporting Agile development within Intelligence Community or other secure government environments
Experience evaluating, selecting, and integrating commercial or open-source Large Language Models into enterprise applications
Experience with vector databases, hybrid search architectures, semantic search, and relevance optimization
Experience leading technical teams or mentoring engineers on AI, search technologies, and modern software engineering best practices
Experience with cloud-native architectures and enterprise AI platforms
Experience developing scalable knowledge management or enterprise search platforms
#CJ

Fantom Corp is a Software Development, Agile Cloud, Cyber Security (Risk Management, Assessments & Authorization (A&A)), Data, AI Platform (Computer Vision Models), Podcasting Media Services, and IT Services provider. Established in 2015, Fantom Corp serves Federal customers with top-notch Cybersecurity Architects, Data Scientists/Analysts, Software Engineers/Developers, DevSecOps Engineers, Project Managers, Identity, Credential Access Management (ICAM) services , and Cloud-certified practitioners. We excel in delivering emerging technologies such as Artificial Intelligence (AI) and Machine Learning (ML) with a focus on identifying trends, object detection, and classification of structured and unstructured data. Fantom Corp possesses mastery in all aspects of digital audio production. We lead in the ideation and creation of efforts for clients who want to harness the power of podcasting. We guide them in selecting the right show format for their needs and goals. As a Small Business, we possess the innovation, speed and flexibility to meet your requirements.

About the Company

Fantom

Systems integration and IT services, analytics

Fantom leads IT services for federal and commercial clients, focusing on big data analytics, system integration, software engineering, and technical consulting. Its offering blends architecture and program management with data-driven capabilities to help organizations detect patterns, uncover trends, and derive actionable insights from structured and unstructured data. Projects are delivered through service contracts and fixed engagements, supported by a team of architects, engineers, and program managers. What sets Fantom apart is its minority-owned status combined with a dual focus on Department of Defense and Intelligence Community work alongside private-sector clients, and its emphasis on employee well-being through benefits like profit-sharing and life insurance. The company's goal is to enable clients to make informed decisions and achieve mission and business objectives by providing specialized IT solutions and data-driven capabilities.

Company size: 11-50
Company stage: Not listed
Total funding: Not listed
Headquarters: Leesburg, VA
Founded: 2014

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