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Software Developer Senior/Expert

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Onsite

Software Developer Senior/Expert

Cornerstone Defense

Software Developer Senior/Expert

Skills

SQL QueriesPythonProcess Improvement

2 months ago

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Important information


Contract type:

Freelance / Contract

Salary:

$200,000 – $240,000 / year

Location:

United States

Work mode:

Onsite

Published on:

24 August 2026

What they need


Title: Software Developer
Location: Herndon, VA
Salary Range: $200-$240K
*Clearance: *Active TS/SCI w/ Polygraph needed to apply Responsibilities include, but are not limited to:

  • Understand requirements and be able to translate the requirements into implementable solutions.

  • Design and develop software components which may involve interfacing with other functional teams and areas.

  • Coach junior team members on software development best practices, highlighting the impacts of design decisions, and making code efficient.

  • Participate in code and design reviews.

  • Research data sources and technical solutions in order to effectively extract, transform, and load data into a database for data processing and analysis.

  • Work with team members to understand the current product features.

  • Follow the development processes and standards used by the team.

  • Commit to continuous process improvement concerning software integration efforts and CI/CD Pipeline.

  • Ability to think strategically and creatively when formulating solutions and is comfortable briefing or demonstrating ideas and solutions to the team.Responsibilities include, but are not limited to:

  • Understand requirements and be able to translate the requirements into implementable solutions.

  • Design and develop software components which may involve interfacing with other functional teams and areas.

  • Coach junior team members on software development best practices, highlighting the impacts of design decisions, and making code efficient.

  • Participate in code and design reviews.

  • Research data sources and technical solutions in order to effectively extract, transform, and load data into a database for data processing and analysis.

  • Work with team members to understand the current product features.

  • Follow the development processes and standards used by the team.

  • Commit to continuous process improvement concerning software integration efforts and CI/CD Pipeline.

  • Ability to think strategically and creatively when formulating solutions and is comfortable briefing or demonstrating ideas and solutions to the team.

  • Recent experience developing in Python (3+ years)

  • Experience with ETL

  • Experience in SQL

  • Demonstrated experience in the Software Development Life Cycle to include debugging, testing, and deployment to different environments

Company Overview:
Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission. Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation’s toughest and most secure problems. If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don’t look any further than Cornerstone Defense.

Benefits Overview:
Cornerstone Defense offers a very comprehensive benefits package including, but not limited to: Medical, Dental and Vision Plans * Generous PTO Policy * 401(k) * HSA and FSA options * Life and Disability Insurance * Tuition Reimbursement and Training * Perks at Work Discount Program * Referral Program * Leads Generation Program * CollegeAmerica 529 * Fitness Reimbursement Program * Travel Assistance * Norton Lifelock Benefit Solutions * Life Planning Financial & Legal Services *

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