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Software Developer (Senior)

SOSi • English • IT Infrastructure & Networking Services • Military Logistics • TS/SCI • 1 day ago
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Salary
≈ $117k – $215k per year (Estimated)
Location
In office (Chantilly)
Seniority
Senior · 7+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 1, 2026. First seen by Alion on Sep 30, 2026. SOSi scores C on the Alion truth index.

Overview
Company
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Profile match

SOSi

SOS International, known as SOSi, is a privately held American government services company founded in 1989 that began by supplying linguists and interpreters to the United States military. It has since broadened into intelligence analysis, logistics and base operations support, information technology and network engineering, and cybersecurity, working for defence, intelligence and federal civilian customers both in the United States and in deployed locations. Headquartered in Reston, Virginia and still family owned, it employs several thousand people, a large share of them holding security clearances.
sosi.com • HQ: Reston, United States • IT Infrastructure & Networking Services • Military Logistics • Translation Services • Intelligence • 1001-5000 employees • Est. 1989
Tech stack of SOSi

Founded in 1989 and headquartered in Reston, Virginia, SOSi is a private defense and government solutions business specializing in advanced technology systems and mission support. Its capabilities include data science, software development, network engineering, intelligence, surveillance, and reconnaissance (ISR), and logistics.

**This position is contingent upon award of contract**

SOSi is seeking a Software Developer to support our government customer in Chantilly, VA.

Essential Job Duties

  • Lead design and development of complex software solutions writing clean, efficient code.
  • Mentor junior developers.
  • Conduct architectural reviews.
  • Integrate COTS, GOTS, and Open-Source components.
  • Drive continuous improvement in development processes.
  • Active in scope TS/SCI w/ Poly.
  • Minimum 7+ years of relevant experience.
  • understanding of the Sponsor's technical environment.
  • Experience in full lifecycle software engineering.
  • Experience moving capabilities from development through testing to production environments.

Working Conditions

  • Office environment.

Working at SOSi

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

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