Senior Palantir Foundry Engineer — Remote, Secret Clearance

Omni Federal; Fort Belvoir (VA); Remote; USD 151,000 - 172,000; Full time

Job summary

Omni Federal is seeking a Senior Application Developer to design and sustain mission-critical applications in the Palantir Foundry environment for Army Vantage and Next Generation Polaris. You will own full-stack development in React/TypeScript, with server-side logic in TypeScript or Java, and work closely with government product owners to deliver features end-to-end.

The ideal candidate has 8+ years in web development, strong Ontology modeling skills, and Active DoD Secret clearance.

Qualifications

• 8+ years of professional web app development with Palantir Foundry experience.
• Hands-on Ontology SDK knowledge including queries, Actions, and Functions.
• Expert TypeScript and React skills with modern UI patterns.
• Professional Java development experience with Ontology SDK.
• Experience creating TS Functions on Objects and unit-tested logic.
• Strong understanding of Ontology modeling and permissions.

Responsibilities

• Design, build, and sustain production web applications on Palantir Foundry for Army Vantage and Next Gen Polaris.
• Own the application layer end-to-end: React/TypeScript front ends and server-side logic.
• Select delivery patterns and justify based on permissions and accreditation constraints.
• Collaborate with analysts and data engineers to map data into applications.
• Implement data validation, error handling, tests, and release documentation.
• Work with government stakeholders in two‑week sprints and document decisions.

Skills

TypeScript

React

Java

Ontology modeling

OAuth client registration

Tools

Palantir Foundry

Ontology SDK

Job description

Omni Federal is seeking a Senior Application Developer to design and sustain mission-critical applications in the Palantir Foundry environment for Army Vantage and Next Generation Polaris. You will own full-stack development in React/TypeScript, with server-side logic in TypeScript or Java, and work closely with government product owners to deliver features end-to-end.

The ideal candidate has 8+ years in web development, strong Ontology modeling skills, and Active DoD Secret clearance.