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Principal Software Engineer (SWE-4)

Leidos

$126,100 - $227,950
Sep 24, 2025
Fort Meade, MD, US
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Leidos is seeking a Principal Software Engineer to support the Access Discovery & Tradecraft mission within the National Security Sector's Cyber & Analytics Business Area. The role involves working on a critical and widely used tool, interacting with analysts, and making enhancements in near real-time to provide the customer's Operations organization with the best possible solutions for their mission needs through rapid prototyping, new development, and advanced technology research.

Requirements

  • Strong Java and/Kotlin development experience.
  • Experience designing, developing, and implementing full stack development.
  • Experience with JavaScript or Typescript as well as MongoDB and Elasticsearch.
  • Experience with modern web UI frameworks such as Angular, Vue, React or Ember
  • API development experience.
  • Familiarity with streaming/event-based architecture (Apache Spark, Apache Flink).
  • Familiarity with NiFi

Responsibilities

  • Will work full stack development, with the ability to focus on specific functions.
  • Experience designing, developing, and implementing full stack development.
  • API development experience.
  • Experience with modern web UI frameworks such as Angular, Vue, React or Ember
  • Experience with JavaScript or Typescript as well as MongoDB and Elasticsearch.
  • Strong Java and/Kotlin development experience.

Other

  • Candidates must possess an active TS/SCI with Polygraph to be considered for this role.
  • Bachelor’s degree in computer science or related technical field plus a minimum of eleven (11) plus years of relevant experience or equivalent.