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# Senior Application Developer - Foundational Services

- **Company:** Mount Indie
- **Location:** Washington, DC, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), JavaScript (Programming Language), Artificial Intelligence, Application Services, Databases, Data Infrastructure, Elasticsearch, JSON, PostgreSQL, MongoDB, Node.Js, OpenShift, Oracle (Applications), Redis, Microsoft SharePoint, Apache Solr, SQL Databases, TypeScript, Extensible Markup Language (XML), Backend, Containerization, AngularJS, Gitlab-ci, Vba Programming Language, NestJS, Docker
- **Published:** August 31, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9130458/senior-application-developer-foundational-services

## About the Role

This position is well suited for a senior developer who combines strong technical depth with the ability to guide other developers and navigate complex application and data environments., * Experience with Node.js and TypeScript.

 * Experience with SQL and/or PostgreSQL.
 * Experience with Redis.
 * Experience with Elasticsearch.
 * An active TS/SCI clearance is required.
 * A CI Polygraph is preferred, with candidates who currently hold a polygraph receiving priority.
 * Strong candidates with an active TS/SCI but without a CI Polygraph may still be considered based on their technical qualifications.

Highly Desired

 * JSON
 * Java
 * JavaScript
 * SharePoint
 * XML
 * VBA
 * Oracle
 * MongoDB
 * Solr
 * OpenAI or other AI technologies

## Description

We are hiring a Senior Application Developer to provide technical expertise supporting foundational application services and mission-focused systems. In addition to hands-on full-stack development, this role offers the opportunity to serve as a subject matter expert, troubleshoot complex application issues, and mentor mid-level developers., * Serve as a senior technical resource and subject matter expert supporting foundational application services.

 * Perform hands-on full-stack application development.
 * Mentor and provide technical guidance to mid-level developers.
 * Troubleshoot complex application and system issues.
 * Analyze server logs, application logs, and console output to identify and resolve technical problems.
 * Support classification and need-to-know handling requirements.
 * Work with cross-domain transfer processes.
 * Develop and support applications using modern web, backend, database, and container technologies.
 * Support secure environments requiring occasional SCIF access.

Principal Technologies

 * TypeScript
 * Angular
 * Node.js
 * NestJS
 * Express
 * Jest
 * MongoDB
 * PostgreSQL
 * Redis
 * Elasticsearch
 * GitLab CI Pipelines
 * Docker
 * OpenShift, A recent CI Polygraph is preferred to support onboarding and access timelines. An immediate start may be possible.


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