Software Developer (Senior)
- Location
- Chantilly, VA, United States
- Work mode
- On-site
- Employment type
- Full-time
About the job
Company Description 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.
Job Description *Position is contingent upon contract award* 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.
Qualifications
- 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.
Additional Information Working Conditions
• Office environment. Working at SOSi All interested individuals will receive consideration and will not be discriminated against for any reason.
From SOSi's careers page (SmartRecruiters), checked 29 Oct 2026.
How to apply
- Select Apply on jobs.smartrecruiters.com. It opens SOSi's own application form in a new tab, run on SmartRecruiters.
- Fill in the form and upload your résumé there. Jobiwork never sees your application.
- SOSi will reply to you directly. No real employer asks you for money to apply.
Posted 23 Sept 2026 · checked 29 Oct 2026 · Report this job