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Principal Software Architect

Job in Arlington, Arlington County, Virginia, 22201, USA
Listing for: STR
Full Time position
Listed on 2026-01-02
Job specializations:
  • IT/Tech
    AI Engineer
  • Engineering
    Software Engineer, AI Engineer
Job Description & How to Apply Below

STR’s Intelligence Division researches, develops, and transitions advanced analytics and machine learning-based solutions to solve challenging problems related to national security. Our team consists of passionate and motivated engineers with advanced degrees in engineering, computer science, mathematics, and data science, who are seeking opportunities to use their deep technical knowledge and creativity to tackle some of the hardest problems that our customers face.

Our projects span multiple different data modalities and incorporate advanced algorithms, deep learning, and statistical techniques to uncover patterns in social media, structured and unstructured text, time series, geospatial, and imagery data, and must operate under challenging constraints not typically found in the commercial world. The tools and technologies we develop have real world impact and US Government analysts use them to extract and enrich intelligence information around the globe.

The Role

We are looking for a leader who is passionate about collaborating with high-performance teams to solve unique national security challenges with novel technologies. As a Principal Software Architect, you will leverage your skills in systems and software development to operationalize advanced statistical machine learning algorithms and support production-level systems. You will work closely with other software engineers and researchers – teammates from both STR and subcontractors – to design cutting-edge solutions to challenging problems impacting national security including classification, anomaly detection, forecasting, and much more.

You will also interact with customers to understand requirements and use cases and apply feedback to respond to their most critical problems.

Due to the nature of our work, applicants should expect to primarily work onsite at a government location, e.g., ~75% time at the customer site, and the rest of the time at STR’s Arlington, VA office: the split work location is designed to support strong engagement with our customers, our on-site team members, and STR’s technical and business operations teams in Arlington, VA and Woburn, MA.

This role will take advantage of STR’s flexible, hybrid environment – when the work does not require use of STR’s facilities, you are welcome to work remotely.

What You Will Do:

  • Lead an active, distributed team of STR and subcontractor engineers in creating and maintaining system infrastructure, including data pipeline architecture, algorithm execution, storage, distribution and access
  • Be a senior STR technical leader onsite, engaging on new requirements, providing ad hoc status updates, coordinating with subcontractors, and ensuring that a corpus of programs are collaborating on data, technical lessons learned, and technical integration activities.
  • Understand stakeholders, end users, and their constraints to create customer solutions that address mission requirements
  • Architect and implement capabilities for integrating component technologies and orchestrating overall workflows
  • Empower engineers, and scientists to act with a meaningful degree of autonomy by developing and clearly communicating a unifying product vision and strategy
  • Identify and implement opportunities to automate manual processes, optimize data delivery, system performance and scalability
  • Monitor for changes to data or environment that could significantly impact system performance to mitigate issues and maximize system uptime
  • Perform testing to ensure system function and performance

Who You Are:

  • Motivated collaborator who is looking for the opportunity to work with a team of high-end researchers and engineers to develop and deploy novel machine learning solutions for real mission impact
  • Aptitude for collaborating with stakeholders across a wide range of technical comfort levels
  • Organized, detail-oriented, and with an ability to work both independently and collaboratively
  • Experience with a range of software maturity, from functional prototypes to production-level systems; experience troubleshooting issues and identifying opportunities for improvement
  • Experience supporting and working within a large, cross-functional,…
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