Senior Software Engineer — Simulation & Decision Support

NPAworldwide; Reston (VA); On-site; USD 135,000 - 175,000; Full time

Job summary

NPAworldwide is seeking a Software Engineer specializing in simulation, optimization, and decision-support tools in Reston, VA. You will contribute across the full stack from backend services to intuitive front-end interfaces.

You will collaborate with researchers and end users to translate ideas into usable software, ship prototypes, demos, and production deployments in a small, mission-focused team.

Qualifications

• Bachelor's degree in Computer Science, Mathematics, Physics, Applied Math, or related field.
• 5+ years of professional software engineering experience.
• Strong experience with React, TypeScript, and modern front-end tooling.
• Experience building backend services/APIs in Java, Rust, or similar languages.
• A track record of writing readable, maintainable, well-engineered code in a collaborative setting.
• Comfort working directly with researchers, engineers, and end users to turn ideas into usable software.
• Exposure to full-stack web development in any modern framework.
• U.S. citizenship required; must hold an active Top Secret clearance.
• Active TS/SCI clearance (nice to have).
• Experience with performance-sensitive, algorithmic, or parallel/concurrent software (nice to have).
• Background in defense, national security, or other mission-driven environments (nice to have).
• 3D, geospatial, or high-performance visualization experience (WebGL, OpenGL) (nice to have).
• Experience with distributed systems, databases, or messaging/async processing (nice to have).
• Familiarity with AI/ML-enabled software (LLMs, computer vision, model integration) (nice to have).
• Experience with cloud/containerized deployment (AWS, Docker, Kubernetes, CI/CD) (nice to have).

Responsibilities

• Build and scale full-stack applications supporting simulation, optimization, and decision-support tools.
• Design backend services and APIs (Java, Rust, or similar).
• Build responsive, intuitive front-end applications (React, TypeScript).
• Partner directly with researchers and end users to shape requirements and translate technical concepts into working software.
• Contribute at every stage prototyping, implementation, demos, and deployment.

Skills

React

TypeScript

Front-end tooling

Java

Rust

API design

Collaborative work

Education

Bachelor's degree in CS/Math/Physics

Tools

AWS

Docker

Kubernetes

CI/CD

Job description

NPAworldwide is seeking a Software Engineer specializing in simulation, optimization, and decision-support tools in Reston, VA. You will contribute across the full stack from backend services to intuitive front-end interfaces.

You will collaborate with researchers and end users to translate ideas into usable software, ship prototypes, demos, and production deployments in a small, mission-focused team.