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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Lead Full Stack Engineer (Foundry) - **Company:** TEKSYSTEMS INC. - **Location:** Arlington, DC, United States - **Experience:** Expert - **Contract:** Contract - **Skills:** HTML, Agile Methodology, Cascading Style Sheets (CSS), Code Review, Collaborative Software, Data Retrieval, Linux, Apache Maven, Node.Js, Package Management Systems, Preprocessor, Scrum Methodology, Responsive Web Design, Software Engineering, Software Requirements Analysis, TypeScript, Scripting, ReactJS, Concurrency, Ios Frameworks, Software Application Programming, Backend, Information Technology, Build Tools, Asynchronous Programming, Api Design, Restful APIs, Software Version Control, Data Pipelines - **Published:** August 14, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9089288/lead-full-stack-engineer-foundry ## About the Role 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 ## Related Videos - [The Resilience of the World Wide Web](https://www.wearedevelopers.com/videos/1281-the-resilience-of-the-world-wide-web) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [Stop using Node.js like in 2020! 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