Research Innovations

Principal Software Engineer

United States full-time Senior Salary not listed
full-time Senior level Technology & IT Curated
Sign in to apply Free account — we bring you straight back to this role.

About the role

Position Title: Principal Software Engineer
Location: Remote with travel to customer sites
Clearance Requirement: Top Secret/SCI required
Employment Type: Full-Time

Research Innovations, Inc. (RII) is breaking through the big, slow, status quo with transformative technology that fundamentally changes and improves the world. We develop cutting-edge software for all levels of the government and military. Using agile development practices and user-centered design, we create innovative software solutions for complex real-world problems.

We are looking for a committed Principal Software Engineer to join the MAX Electromagnetic Warfare (EW) product team within our Tactical Command & Control line of business. You will help build the EW and spectrum operations capabilities of the MAX platform — modeling complex electromagnetic environments, integrating physics-based propagation models, and turning messy real-world data into workflows warfighters actually use. Get s#it done.

This position requires an active US Top Secret/SCI clearance.

WHAT YOU WILL BE DOING

Design and develop EW and electromagnetic spectrum operations capabilities for the MAX platform, from data model to user-facing workflow

Model complex operational domains in code: design schemas and data models that unify disparate, messy data sources into coherent, trustworthy representations

Integrate and validate physics-based RF propagation models, terrain and clutter data, and third-party services via APIs

Build and maintain integrations with external C2 systems, sensor feeds, and telemetry sources

Develop with modern AI-assisted and agentic coding workflows: shape the problem, author and review detailed implementation plans, direct AI coding agents, and own the quality and correctness of what ships

Collaborate through plan reviews and merge requests in a highly collaborative, no-egos team culture

Demo working software to customers, translate their feedback into priorities, and iterate quickly

Support deployment of the product across cloud, on-premises, and edge/DDIL environments

Contribute to software design and test documentation, and mentor teammates in your areas of depth

Continuously challenge yourself to become a better software developer

WHAT YOU HAVE DONE

BS degree in a related technical field and 5+ years of relevant professional experience (an advanced technical degree may substitute for a portion of the experience)

Modeled complex real-world domains in software: schema and data model design, entity resolution across disparate sources, and API-based data integration

Professional experience in Python, C#, Java, or similar languages, and with SQL-based persistence solutions

Experience integrating data from third-party applications and services via REST APIs

Hands-on experience with AI-assisted or agentic software development, including reviewing and verifying AI-generated work

Disciplined testing practices: unit testing, test-driven development, and validation of your own work

Experience working in containers (Docker) and familiarity with Kubernetes-based deployment

Experience demoing software to customers and translating user needs into technical requirements

Ability to multitask, self-assign work, and function in a dynamic, fast-paced development environment

Experience mentoring other developers

Excellent verbal and written skills

EVEN BETTER

Experience with electromagnetic spectrum operations: spectrum management, RF propagation modeling, link analysis, or EW planning workflows

Experience supporting DoD customers, including on-site engagement with program offices or operational units

Familiarity with terrain, elevation, and land cover data sources (DTED, GMTED, LiDAR-derived datasets)

Experience with data across classification levels, cross-domain solutions, and build-low/ship-high development

Experience with Tactical Assault Kit (TAK) or integrating with platforms such as Palantir via OSDK/APIs

Experience with edge and DDIL deployment environments

At RII, we believe that diversity in our workforce is critical to our success. We strive to hire great people from a wide variety of backgrounds, not just because it’s the right thing to do, but because it makes us stronger. We work to help your intellectual passions and creativity thrive. It’s one of our core values: Let your geek flag fly.
We also offer all employees comprehensive benefits including: flexible work schedules, health insurance coverage, paid time off, 401k with a company match, paid parental leave, access to wellness programs and much more. You get this all from day one, and all paid for by RII.
It’s all part of another of our core values: Stay human. It’s why our comfortable and colorful offices such as our headquarters, include a community game room, pantry, massage chair, and an escape room, among other amenities. It’s why we have community ambassadors and regular community events.

Research Innovations Incorporated is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or any other characteristic protected by applicable law.
Originally posted on Himalayas

Interview prep

Walk in with sharper answers.

Use this as a quick practice sheet before you speak with the employer.

Senior
Technology & IT API integration MySQL Operations Project Management Python Senior level

Likely questions

  1. Tell us about work you have done that is close to the Principal Software Engineer role.
  2. How would you approach your first 30 days at Research Innovations?
  3. Which of API integration, MySQL and Operations have you used recently, and what did it help you achieve?
  4. How have you led people, improved a process, or made a hard decision in a previous role?
  5. How do you handle busy days, changing priorities, or pressure at work?

Prepare before the call

  • A recent example that proves your experience with API integration, MySQL and Operations.
  • One short story with a problem, your action, and the result.
  • Two examples that show the strengths listed on your CV.
  • A clear reason why this role and company interest you.
  • Your availability, preferred work style, and salary expectations.

Ask them

  • What would success look like in the first 90 days?
  • What are the main problems this hire should help solve?
  • How does the team give feedback and measure good work?
  • What does a normal working week look like for this role?
Practice line

I am interested in the Principal Software Engineer role because I can bring practical experience in API integration, MySQL and Operations, learn the team quickly, and contribute to the outcomes Research Innovations needs from this hire.

Related jobs.

More roles from this company or category.