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techroles

Senior Full Stack/UI Developer

SOSi sosi.com Open · verified Oct 24, 2026
On-site Chantilly Full-time Senior Frontend Engineering

At a glance

Senior Frontend Engineering role at SOSi. Chantilly · full-time · $102,414–$212,706 base.

SalaryStated by SOSi
$102,414 – $212,706
Base salary for this role, in USD per year, as published in the posting.
RoleFrontend Engineering
SenioritySenior
LocationChantilly
WorkplaceOn-site
EmploymentFull-time
Base pay$102,414–$212,706
PostedJun 30, 2026 · 3mo ago
Role brief

techroles summary, based on the employer's posting.

What you'll do

  • Design, build and maintain applications for cyber analysis
  • Turn technical needs from cyber specialists, data scientists and engineers into responsive interfaces and dependable backend services
  • Develop user interfaces and scalable backend systems for the applications

What you bring

  • You hold an active, in-scope TS/SCI clearance with poly and are a U.S. citizen
  • You have three to five years of hands-on full-stack and UI development, or equivalent practical experience, plus a STEM degree
  • You bring experience creating user interfaces and robust backend systems, familiarity with AI/ML applications, and a solid grasp of DevOps principles

Who this fits

This is a senior developer role based on-site in Chantilly, Virginia, in an office environment with desk work and meetings. U.S. citizenship and an active, in-scope TS/SCI clearance with poly are required; candidates will not be put forward for new clearances.

From the employer

Founded in 1989, SOSi is among the largest private, founder-owned technology and services integrators in the defense and government services industry. We deliver tailored solutions, tested leadership, and trusted results to enable national security missions worldwide.

SOSi is seeking skilled Senior Full Stack/UI Developer to support a US government customer in Chantilly, VA.

This role will be responsible for designing, developing, and maintaining cyber analytic applications. This role involves collaborating with cyber SMEs, data scientists, and engineers to translate complex technical requirements into responsive user interfaces and robust backend services.

Minimum Requirements

  • Active in-scope TS/SCI clearance with poly. This security clearance requires U.S. citizenship. Candidates will not be nominated for new clearances.
  • 3–5 years of hands-on experience in full-stack and UI development, or equivalent practical experience, with a STEM degree (field such as computer science, statistics, data analytics, computer engineering, mathematics, etc.).
  • Experience building scalable and robust backend systems.
  • Experience building user interfaces
  • Familiarity with AI/ML applications
  • Solid understanding of DevOps principles (automation, monitoring, reliability)

Preferred Qualifications

  • Experience in the US Intelligence Community.

Work Environment

  • Office setting with a combination of desk work and meetings.

Working at SOSi

All interested individuals will receive consideration and will not be discriminated against for any reason.

Opportunity

Frontend Engineering work from LinkedIn, X, Reddit and Upwork, in one list.

Each morning you get everything that fits, strongest first.

Frontend Engineering$100k+

Find me work

By the team behind techroles.

Find me work
Opportunity

Frontend Engineering work from LinkedIn, X, Reddit and Upwork, in one list.

Each morning you get everything that fits, strongest first.

Find me work

By the team behind techroles.