Principal Software Engineer with 25K sign on bonus

Leidos

$154K — $278K *
Information Technology
15+ years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's degree in Computer Science or related field, or equivalent experience.
  • 20 years of relevant software engineering experience.
  • Active Top Secret/SCI clearance with Polygraph is mandatory.
  • Experience in front-end development and UI testing preferred.
  • Ability to write test scripts in Python, with Robot Framework experience strongly preferred.

Responsibilities

  • Collaborate with developers to design, implement, and validate features using React and related libraries.
  • Support integration of UI components with back-end services in Java and/or C++.
  • Participate in Agile development teams for sprint planning and code reviews.
  • Document test cases, results, and processes for quality assurance.
  • Explore and implement front-end automation tools to improve efficiency.

Benefits

  • Eligibility for a $25,000 sign-on bonus.
Full Job Description
This position is eligible for a sign on bonus of $25,000.

Primary Responsibilities:
  • Collaborate with developers to design, implement, and validate features in React and related front-end libraries.
  • Support integration of UI components with back-end services written in Java and/or C++.
  • Participate in Agile development teams, contributing to sprint planning, code reviews, and daily stand-ups.
  • Document test cases, results, and processes to support ongoing quality assurance.
  • Explore and apply other front-end automation tools as appropriate to improve efficiency.

Basic Qualifications
  • Bachelor's degree in Computer Science or related discipline from an accredited college or university is required. Four (4) years of additional SWE experience on projects with similar software processes may be substituted for a bachelor's degree. Masters Degrees may count toward experience requirements
  • 20 years of relevant experience
  • Clearance Requirement:Active Top Secret/SCI clearance with Polygraph.


Preferred Qualifications
  • Experience with front-end development and/or UI testing.
  • Familiarity with React, Java, and/or C++.
  • Ability to write test scripts in Python (Robot Framework experience strongly preferred).
  • Hands-on experience with Robot Framework for UI automation.
  • Exposure to other front-end automation tools (e.g., Selenium, Cypress).
  • Knowledge of modern web technologies: JavaScript, TypeScript, HTML, CSS.
  • Experience working in Agile development environments.


CSSRC

conmd

Original Posting:
May 20, 2026

Pay Range:
Pay Range $154,050.00 - $278,475.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

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