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Lead Full Stack Engineer (Foundry) with Security Clearance

TEKsystems c/o Allegis GroupPentagon, DC🇺🇸United StatesPosted 12 Aug 2026

Why This Role Stands Out

Leverage your expertise in Foundry development to lead impactful projects and shape innovative solutions in a critical government sector, offering significant career growth. This role is ideal for a seasoned full-stack engineer with a strong technical foundation and leadership potential, ready to contribute to a mission-driven team. Apply to advance your skills and make a tangible difference.

Quick Overview

Work Type
On Site
Level
Mid Senior

Job Description

Title: • Lead Full Stack Developer (Foundry / Maven) Location:

  • Pentagon / Washington D.C. (FULLY-ONSITE) Years of Experience Required:
  • 6+Years of Software Engineering & 2+ Years as a Team Lead / Project Lead Clearance Required:
  • Secret College Degree Required:
  • Bachelors or higher in Software Engineering, Computer Science, or related Top Skills Required:
  • Foundry Development (MUST HAVE)
  • Experience building applications, data pipelines, or ontology-backed workflows in Foundry
  • Ontology design (object types, links, actions), Workshop and/or Slate applications
  • Foundry Functions (TypeScript), and ideally the Ontology SDK (OSDK) for custom React apps. • Asynchronous programming, observables, and data structuring. • Node.js/TypeScript building REST APIs and solid understanding of concurrency, async patterns, and API design. • Demonstrated experience with application state management strategies. • Solid understanding of HTML and CSS, including responsive design principles, CSS preprocessors, and knowledge of UI frameworks. • Developing full stack web applications following design team specifications. • Familiarity with front and backend build tools and package managers. • Strong team player who thrives in a highly collaborative and cross-function environment, with a growth mindset. • Development processes: source control, defect tracking, and collaborative tools; code review a plus. • Conducting peer reviews. • Decomposing software requirements into actionable development capabilities. • Excellent communicator, both written and verbal. Nice to have experience:
  • Maven Smart System, AIP, or Gotham in a defense or intelligence context strongly preferred
  • Capacity to design scalable and maintainable solutions and patterns
  • Analyzing and employing strategies that optimize user experience, data retrieval and storage, and performance
  • Scripting in Linux and Windows environments
  • Encryption and cryptography algorithms
  • Scrum or other agile methodologies • This position requires an active DoD Clearance (Secret, Top Secret, Top Secret/SCI) or the ability to be obtain an (Interim Secret, Interim Top Secret)
  • Because an active or interim DoD clearance is required, U.S. Citizenship is required o Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms.  If eligible, the benefits available for this temporary role may include the following:
 Medical, dental & vision
 Critical Illness, Accident, and Hospital
 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available
 Life Insurance (Voluntary Life & AD&D for the employee and dependents)
 Short and long-term disability
 Health Spending Account (HSA)
 Transportation benefits
 Employee Assistance Program
 Time Off/Leave (PTO, Vacation or Sick Leave)

Skills

Node.js
Encryption
Scrum
Agile
CSS
HTML
REST
React
TypeScript

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