Want to get hired at Core One?

Software Engineer

Core One

McLean, Virginia, United StatesOn Site

Original Job Summary

Software Engineer at Core One

Join our team at Core One! Our mission is to be at the forefront of devising analytical, operational and technical solutions to our Nation's most complex national security challenges. We value people first, recruit top talent, and provide a competitive total compensation package.

Role Overview

The Software Engineer will design, develop, and deliver high-quality web applications and internal tools. You will collaborate with cross-functional teams to create robust, scalable, and secure systems.

Key Responsibilities

  • Collaborate with stakeholders to understand and solve user pain points.
  • Develop clean, maintainable, and well-tested code.
  • Participate in code reviews and design discussions.
  • Troubleshoot and resolve technical issues.
  • Enhance system performance, scalability, and security.
  • Integrate with internal and third-party systems.
  • Design and maintain tools that improve operational efficiency.

Required Qualifications

  • Active TS/SCI with Polygraph clearance.
  • Bachelor’s degree in Computer Science or equivalent experience.
  • 8+ years of relevant software development experience.
  • Experience with API development and Linux scripting.
  • Proficiency with relational and non-relational databases.

Desired Qualifications

  • End to end workflow experience.
  • Experience on Sponsor systems.
  • Advanced certifications such as DevOps Engineer – Professional.
  • Knowledge in additional programming languages or frameworks.
  • Experience in building internal tools.
  • Understanding of usability and UX principles.

Key skills/competency

Software Engineer, national security, TS/SCI, API, Linux, databases, scalability, security, DevOps, internal tools.

How to Get Hired at Core One

🎯 Tips for Getting Hired

  • Research Core One's culture: Study their mission and team values online.
  • Customize your resume: Highlight TS/SCI and technical skills.
  • Tailor your cover letter: Address national security projects.
  • Prepare for technical interviews: Practice coding and system design.
  • Showcase collaboration: Emphasize teamwork in past roles.

📝 Interview Preparation Advice

Technical Preparation

Review API development practices.
Practice Linux shell scripting.
Study database integration techniques.
Update code review and testing skills.

Behavioral Questions

Describe team collaboration experiences.
Explain conflict resolution in projects.
Discuss handling of high-pressure deadlines.
Share examples of independent work.