Software Engineer with TS

Henpen Corporation; Reston (VA); On-site; USD 120,000 - 180,000; Full time

Job summary

Henpen Corporation in Reston, VA is seeking a Software Engineer with TypeScript experience to support mission-critical simulations and decision-support tools across the full stack.

You will work with researchers and end users, design backend services in Java or Rust, and build frontend applications in React/TypeScript, from prototyping to deployment.

Required: Bachelor's in CS/Math/Physics, 5+ years of software experience, and an active Top Secret clearance.

Qualifications

• Bachelor’s degree in CS/Math/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.
• Ability to write readable, maintainable code in a collaborative setting.
• Comfort working 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.

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 with researchers and end users to shape requirements.
• Contribute at every stage — prototyping, implementation, demos, and deployment.

Education

Bachelor's degree in Computer Science, Mathematics, Physics, Applied Math, or related field

Tools

Java

Rust

React

TypeScript

Job description

Software Engineer with TS

Location:Reston, VA

Security Clearance:TOP SECRET

Software Engineer — Simulation, Optimization & Decision Support

Join a team building mission-critical software that turns complex technical concepts into tools decision-makers actually rely on.

You’ll work across the full stack — from backend services to the interfaces that make sophisticated simulations and optimization models usable — and across the full lifecycle, from early prototyping through deployment.

We’re a small, collaborative group where engineers own real problems end to end.

If you like working close to the research, translating hard technical ideas into clean, maintainable software, and seeing your work go from whiteboard to operational use, this role is built for you.

What You’ll Do

• 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

Required 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

Nice to Have

• Active TS/SCI clearance
• Experience with performance-sensitive, algorithmic, or parallel/concurrent software
• Background in defense, national security, or other mission-driven environments
• 3D, geospatial, or high-performance visualization experience (WebGL, OpenGL)
• Experience with distributed systems, databases, or messaging/async processing
• Familiarity with AI/ML-enabled software (LLMs, computer vision, model integration)
• Experience with cloud/containerized deployment (AWS, Docker, Kubernetes, CI/CD)