- Full Time
- San Francisco
Astranis at a glance
astranis.comSource: Wikipedia
Astranis
Astranis builds advanced satellites for high orbits, expanding humanity’s reach into the solar system. Today, Astranis satellites provide dedicated, secure networks to highly-sophisticated customers across the globe— large enterprises, sovereign governments, and the US military. With five satellites on orbit and many more set to launch soon, the company is servicing a backlog of more than $1 billion of commercial contracts.
Astranis is the preferred satellite communications partner for buyers with stringent requirements for uptime, data security, network visibility, and customization. Astranis has raised over $750 million from some of the world’s best investors, from Andreessen Horowitz to Blackrock and Fidelity, and employs a team of 450 engineers and entrepreneurs. Astranis designs, builds, and operates its satellites out of its 153,000 sq. ft. headquarters in Northern California, USA.
Guidance, Navigation & Control (GNC) Simulation Software Engineer
As a Simulation Software Engineer on the GNC team, you will design, develop, and test our high-fidelity spacecraft simulation that is used to validate the software that controls our satellites while in orbit.
You will improve the core simulation infrastructure and collaborate with engineering teams across the company to model new systems and add interesting new features to the simulator.
Role
- Design, develop, and maintain software for our high-fidelity software simulation platform
- Implement and improve software- and hardware-in-the-loop simulations to validate satellite software and flight algorithms
- Accelerate the software development process through infrastructure improvements
- Develop and enhance Monte Carlo simulation tooling for assessing system performance under various conditions
- Incorporate physics-based models into simulation
- Develop analysis and visualization tooling to provide insight into our system
- Support GNC operations for our fleet of satellites, including on-console and on-call rotations
- Support in recruiting, interviewing, and hiring additional teammates to our rapidly-growing team
Requirements
- BS or MS in Computer Science, Aerospace Engineering, or equivalent background experience
- 2-5+ years in software or building simulations of complex physical systems
- 2-5+ years experience with Python or other high-level object-oriented programming language(s)
- Ability to effectively collaborate with interdisciplinary teams on large software projects
- Strong problem-solving skills and attention to detail
- Highly motivated, self-starting, and able to perform duties autonomously without much supervision
- Don’t meet them all? Not a problem. Please apply even if you do not meet all these criteria.
Bonus
- Understanding of classical or modern control theory, and basic orbital mechanics
- Knowledge of memory management, threading, and interprocess communication techniques
- Experience building and maintaining software infrastructure used across teams
- Experience in statistical analysis techniques and Monte Carlo simulation
- Experience with C/C++
- Experience with AI tooling and agentic workflows
- Experience with databases
- Experience with spacecraft design
Base pay is just one component of Astranis’s total rewards package. Your compensation also includes a significant equity package via incentive stock options, high-quality company-subsidized healthcare, disability and life insurance, 401(k) retirement planning, flexible PTO, and free on-site catered meals.
To apply for this job please visit job-boards.greenhouse.io.
Explore Astranis online
What people say about Astranis
- Ask HN: Who is hiring? (June 2026)
- Satradar – Track 10k+ Satellites up to 120 FPS
- Starlink militarization and its impact on global strategic stability
- Ask HN: Who is hiring? (March 2026)
Recent news
- Astranis Hires Dentons for Defense Spending Lobbying - Legis1
- Astranis secures $450 million in equity, debt to expand small GEO satellite production - SpaceNews
- Thaicom says Astranis-built Thaicom 9 launch delayed to March 2027 following component anomaly affecting 5 satellites - Space Intel Report
- Astranis Raises $450M+, Including $300M Series E - Payload Space
- Wilson Sonsini Advises Astranis on $450 Million Fundraise - Wilson Sonsini
Aggregated from public discussions and news; opinions are the authors’ own.
Working in San Francisco, California
Weather right now in San Francisco, California: checking… · Local time: · Air quality:
San Francisco, officially the City and County of San Francisco, is the fourth-most populous city in California and the 17th-most populous in the United States, with a population of 826,079 in 2025. Among U.S. cities with a population of 200,000 or more, San Francisco is ranked first by per capita income, second by population density, and sixth by aggregate income as of 2024. Some 4.6 million residents live in the city's metropolitan statistical area, which is the 13th-largest in the United States. Around 9.2 million live in the San Jose–San Francisco–Oakland combined statistical area, the fift
California is a U.S. state in the Western United States that lies on the Pacific Coast. It borders Oregon to the north, and Nevada and Arizona to the east; it also shares an international border with the Mexican state of Baja California to the south. With over 39 million residents across an area of 163,696 square miles (423,970 km2), it is the largest U.S. state by population and third-largest by
🇺🇸 Relocation safety for US: Exercise Normal Caution — via Warnely, CC BY 4.0
Source: Wikipedia (state)
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Accommodations: if you need a workplace accommodation to apply for or perform this job, see ADA.gov or EEOC.gov for guidance on your rights and how to request one.
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