Software Engineer – React

Reston, VA Description

Concept Solutions, LLC (CS) is seeking a Software Engineer – React to support a mission-critical application modernization program for a Department of War (DoW) customer.

This initiative focuses on creating a unified experience across multiple production applications through single sign-on, a shared user interface, and a standardized approach to integrating existing applications into a common platform.

The selected candidate will support the ongoing maintenance and enhancement of React applications while helping ensure seamless integration with the broader platform.

Troubleshoot and resolve front-end defects in two React applications, including a small public-facing single-page application supported by a Redis-backed service.

Support embedded-adapter integration that enables legacy functionality to operate within the modern platform interface.

Maintain application stability and functionality while supporting the broader modernization effort.

Participate in two-week Agile sprints, including customer demonstrations at the conclusion of each sprint.

Follow established release processes to support reliable application updates.

Requirements3+ years of front-end software engineering experience using React.

Experience working within formal software release processes.

Preferred Qualifications Experience working with Java back-end applications.

Familiarity with accessibility testing.

Active Secret security clearance.

Work Location and Schedule

Location:

Hybrid – Concept Solutions' Reston, VA headquarters and approved remote locations within the United States, with on-site work at government facilities in Northern Virginia and Maryland as required. Government-furnished equipment will be used for all access to government environments.

Schedule:

Full-time, 40 hours per week, Monday through Friday, with core hours from 9:00 a.m. to 3:00 p.m. Eastern. Two-week sprints with customer demonstrations each sprint.

Travel: 0–10%, within the Washington, DC metropolitan area.

Security Requirement: U.S. citizenship required. Must be eligible to obtain and maintain a DoW security clearance. An active Secret clearance or higher is strongly preferred and may allow an earlier start.

Compensation: $100,000–$120,000 annually, depending on experience.

Contract Status:
This position is contingent upon contract award, with an anticipated start in October 2026.Company Profile:

Founded in 1999 and headquartered in Reston, Virginia, Concept Solutions, LLC (CS) is a leading small business in technology, engineering, and management consulting. We are the innovative and agile force behind strategic solutions that enhance organizational efficiency and safeguard our nation across Aerospace, Defense, and National Security sectors.

For over 25 years, CS has been a trusted partner for the Federal Aviation Administration (FAA), Department of Homeland Security (DHS), Department of Justice (DOJ), Department of Defense (DoD) and other federal agencies delivering vital IT, security, and project management services.

Our commitment to excellence is reflected in our adherence to CMMI-DEV ML3, ISO 9001:2015, ISO/IEC 20000-1:2018, and ISO/IEC 27001-1:2013 standards. CS boasts company highlights that include:

Over two decades of experience across over $300 million in contract awards supporting critical FAA programs

Multiple contract vehicles providing opportunities across FAA, DoD, NOAA, and other Federal agencies

Innovation Council - CS maintains an active Internal Research and Development (IR&D) program that is geared towards identifying emerging technologies and pursuing technological innovations

At CS, we know our success stems from our talented team. That’s why we prioritize the wellbeing and growth of our employees, fostering a…