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CesiumAstro develops communication systems for satellites, UAVs, launch vehicles, and other space and airborne platforms. We are seeking a Senior Software Engineer to support space-centric programs across the Department of War and Intelligence Community.
In this role, you will build modern full-stack applications in support of space mission systems, integrating and modernizing legacy space-related ground and flight software. You will develop distributed applications leveraging microservices, cloud-native architectures, and Distributed Ledger Technology (DLT)/consensus frameworks. You will support on-orbit and ground system integration & test, including emulation, simulation, and interface validation. You will implement DevSecOps pipelines, automated testing, and secure software practices, and develop modern UI/UX interfaces for mission operators and analysts. You will work closely with space system engineers, mission integrators, and operations teams, and contribute to a mission-focused engineering culture where your ideas shape the product.
We are looking for engineers who thrive in a fast-paced startup environment and enjoy solving hard problems. Our culture is simple: work hard, solve real problems, build things that matter.
REQUIREMENTS:
- Bachelor's degree in Software Engineering, Computer Engineering, or relevant field
- 5+ years of relevant software engineering experience
- Demonstrated technical leadership across software modernization or distributed systems
- Experience architecting microservices, APIs, message buses, and high-availability systems
- Expertise integrating and testing software for space-based or ground mission systems
- Ability to mentor junior engineers and guide design decisions
- Experience with DoD/IC programs, ATO processes, or DevSecOps on classified systems
- Experience developing in C++, C#, Rust, Python, or Go
- Experience with SQL/NoSQL database design and integration
- Experience with cloud services (AWS, Azure, or GovCloud variants)
- Experience with GitHub, Jira, and Confluence
- U.S. Citizenship required with ability to obtain a Secret security clearance
- Ability to travel up to 10%
PREFERRED EXPERIENCE:
- Existing security clearance (TS/SCI preferred)
- Experience supporting DoD/IC programs
- Experience building software for spacecraft, OPS software, or flight/ground segment integration
- Experience with high-performance computing, distributed processing, or real-time systems
- Experience with performance tuning and resource-constrained environments
- Experience with DevSecOps, IaC, and automated test frameworks
- Familiarity with DLT, blockchain, or consensus protocols
- Experience with modern UI/UX frameworks (React, Vue, Svelte, Blazor, etc.)
