Ground Software Engineer (Mid-Career)

Millennium Space Systems
El Segundo, CA

Company Overview
Millennium Space Systems, A Boeing Company delivers affordable, high-performance space systems for exacting customers. At Millennium, you will be part of a close-knit team working on exciting technological problems. We work in an open environment where ideas are shared across all disciplines, and there are ample opportunities for advancement based on excellence. Superstars are welcome.

At Millennium, we innovate and collaborate to make the world a better place. From the seabed to outer space, you can contribute to work that matters with a company committed to fostering an environment for every teammate that's welcoming, respectful and innovative, with great opportunities for professional growth. Find your future with us.

Job Summary
As a Ground Software Engineer, you will cover spacecraft production, integration and test. Your primary task will be dispositioning and root causing non conformances and issues as they come up, secondary tasking will be design based leveraging your experience with the integration and test. You will work closely with technicians, integration and test engineers as well as the design engineering team to foster a deep understanding of spacecraft design and subsystems, sharpening your skills and being a technical expert in your field.

This position's internal job code is SWE-Developer. Our team is currently hiring for level 3-4.

Responsibilities


  • Leads the design, development, integration, testing, and delivery of large-scale ground software and mission control systems

  • Interacts with other Millennium staff to support testing on components, subsystems, and spacecraft in test configurations

  • Integrates Millennium software applications into Government-furnished software and infrastructure

  • Executes integrated system test events bridging Millennium-developed products and Government-furnished systems

  • Implements specific mission data processing applications into existing systems to support payloads and end data users

  • Supports software testing and installation in classified environments

  • Guides junior developers through development tasks, troubleshooting exercises

  • Plans and executes validation/verification testing

  • Contributes to ground software or tool development by completing larger feature requests, taking ownership of larger software modules, analysis packages, and workflows

Minimum Qualifications


  • Bachelor’s degree in Computer Science, Computer Engineering, Aerospace Engineering, or a related field

  • Five (5) or more years of experience designing and developing software in a production environment

  • Demonstrated experience writing scripts and backend software applications in Python

  • Demonstrated experience with Python webserver frameworks (Twisted, Flask, FastAPI) and building RESTful web services in conjunction with message broker architectures

  • Demonstrated experience with backend development interacting with relational, time-series, and document databases (PostgreSQL, InfluxDB, MongoDB).

  • Comfortable building interactive UIs using Javascript frameworks

  • Familiarity with GitLab CI/CD and Infrastructure as Code practices

  • Familarity with containerization and container orchestration practices using Docker, Podman, and Kubernetes

  • Experience with unit testing, integration tests, and end-to-end testing

  • Comfortable communicating technical details verbally and in writing

  • Experience with iterative and agile software development

  • Ability to obtain TS/SCI clearance

Preferred Qualifications


  • Active TS/SCI clearance

Please note that the salary information shown below is a general guideline only of what is reasonably expected to be paid for the position. Salaries are based upon candidate experience and qualifications, as well as market and business considerations.

Summary Pay-Range


  • Level 3: $114,750 - $168,750

  • Level 4: $136,850 - $201,250

Before applying, please note:
Millennium is DDTC-registered, ITAR-compliant Company. This position is located at a facility that requires special access. Applicants MUST be U.S. citizens and eligible for a security clearance. Additionally, applicants must be willing to apply for and maintain a security clearance. We encourage all interested candidates to apply for any open position for which they feel they are qualified.

Posted 2026-02-13

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