Software Engineer, Backend Developer

Position Summary

We are seeking a Mid-Level Software Engineer to contribute to the development of the Multimode Threat Engagement Simulation Platform under the technical direction of the Lead and Senior Staff Engineers. You will build features across the stack — backend physics API endpoints in Julia, React/Type Script UI components, and Cesium map view integrations — while growing your expertise in high-performance scientific computing and defense mission engineering applications.

This role is an opportunity to develop real depth in an intersection of disciplines that is rarely available at early career: scientific computing with Julia, 3D geospatial visualization with CesiumJS, and the physics of aerospace and defense sensor systems. You do not need to arrive with domain knowledge — you will acquire it through hands-on work alongside domain experts and through structured mentorship from the Lead Engineer.

What you do need is a solid programming foundation, genuine curiosity about computational physics, and the ability to write clear, tested, maintainable code.
*** Contingent upon contract award**
* Responsibilities

Backend Development Implement and test Julia HTTP API endpoints for mission data CRUD operations, trajectory query routing, and physics result serialization

Write Julia utility functions for data format conversion:
GeoJSON, CZML, mission JSON schema parsing and generation

Assist with Monte Carlo driver implementation: input parameter perturbation, result aggregation, and statistical output computation (CEP, R95, Pk distribution)
Write unit and integration tests for computation backend endpoints; validate API response schemas against the frontend contract

Maintain and extend the mission data serialization layer: add new asset types, task attributes, and output fields while preserving backward compatibility with existing save files

Frontend Development Build and maintain React/Type Script components for the mission planning UI: forms for asset creation and editing, task assignment dialogs, mission parameter panels, and tabbed navigation

Implement Cesium/Resium map features: add new asset marker types, update entity styling based on mission state, and wire up click/hover interactions between the globe and the mission data panel

Consume Julia backend API endpoints from the React frontend: implement fetch calls, loading states, error handling, and result rendering for trajectory and analysis queries

Write Type Script type definitions for all mission data structures shared between the frontend and the Julia APITesting and Dev Ops Support Write automated tests at the component level (React Testing Library or equivalent) and integration level (API contract tests)
Assist with CI/CD pipeline maintenance: diagnose build failures on Windows and Linux targets, update dependency versions, and validate packaged installer behavior

Participate in code review: give and receive feedback on correctness, performance, and readability

Maintain technical documentation: update API reference docs, build guides, and developer setup instructions as features evolve
*** Contingent upon contract award**
* Qualifications

Citizenship:
Must be a US citizen

Minimum

Required Qualifications Clearance:
Active Secret Clearance

Education:

B.S. in Computer Science, Software Engineering, Electrical Engineering, Physics, or related STEM field

Years of

Experience:

1–4 years of software development experience, including internships, research projects, or personal projects demonstrating relevant technical depth

Certifications:

NA Additional Skills Proficiency in at least one programming language with strong typing discipline (Type Script, Python, Java, C++, Rust, or Julia)
Familiarity with REST API design patterns: HTTP methods, JSON…