Demo

Application Developer, Mid (Foundational Services)

Castalia Systems
Bolling, DC Full Time
POSTED ON 10/23/2026
AVAILABLE BEFORE 11/23/2026
Job Type: Full- Time

Workplace Type: Hybrid onsite 2 days a week

Clearance: TS/SCI and preferably a CI polygraph


Job Summary

Castalia Systems is seeking an Application Developer Mid (Foundational Services). The Application Developer Mid will serve on our Foundational Services team and provide training/support to the team with other mid level developers.

Roles and Responsibilities

A qualified candidate will perform the following duties and responsibilities, but are not limited to:
  • Responsible for classification rollup and NTK handling programmatically
  • Responsible for cross-domain transfer processes (high to low)
  • Review server logs and consoles to triage and debug onsite. This is foundational services role that services all EPD applications.

Required Qualifications
  • Bachelor's degree from an accredited college or university
  • Minimum 4 years of experience related to the specific labor category; or a minimum of 8 years of experience related to the specific labor category if individual has a HS Diploma.
  • TypeScript, Angular, Node, NestJS, Express Servers, Jest, MongoDB, PostgreSQL, Redis, ElasticSearch, GitLab CI Pipelines, Docker, OpenShift.
  • Node.js with Typescript, SQL, PostgreSQL, Redis, ElasticSearch.

Preferred Qualifications
  • JSON, Java, Java Script, SharePoint, XML, VBAs, Oracle, MongoDB, Solr, SQL, Open AI, other AI technologies.
  • CI Poly.

Physical Requirements/Work Environment
  • Normal office environment.
  • Hybrid Support

Travel
  • Less than 5%.

Company Description

Castalia Systems is a proven business partner providing mission critical solutions to the Federal Government. We provide cutting edge solutions from Securing and Managing Data to Systems Engineering and Development. Castalia Systems is a pioneer in Artificial Intelligence Design and Application.

With our vast knowledge of our customers needs and relevant technology, our team is able to bring successful solutions to every mission. We are one-upping our competitors by providing premium IT solutions and platforms with cutting-edge technology so it's so evident when you compare us with anyone.

Compensation

At Castalia Systems, we provide you with opportunities and choices and support your total well-being. Our benefits include: Medical, dental, vision coverage, 401k matching, generous PTO, paid holidays, professional training opportunities, and even pet insurance to ensure your furry friends are cared for too. All regularly scheduled employees working at least 30 hours per week are eligible to participate in Castalia Systems benefit programs. Individuals that do not meet the threshold are only eligible for select offerings, not inclusive of health benefits.

Salary at Castalia Systems is determined by various factors, including but not limited to location, position knowledge, skills, competencies, and experience, as well as contract-specific affordability and organizational requirements. The projected compensation range for this position is $150,000.00 to $170,000.00 (annualized USD). The estimate displayed represents the typical salary range for this position and is just one component of Castalia Systems total compensation package for employees.

Disclaimer

Castalia Systems is an equal employment opportunity and affirmative action employer and strives to comply with all applicable laws prohibiting discrimination based on race, color, creed, sex, sexual orientation, age, national origin, or ancestry, physical or mental disability, veteran status, marital status, HIV-positive status, as well as any other category protected by federal, state, or local laws. All such discrimination is unlawful, and all persons involved in the operations of the company are prohibited from engaging in this type of conduct.

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Salary : $150,000 - $170,000

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