Senior Staff Software Engineer - Fullstack

About the role

Please Note: To conform with the United States Government Space Technology Export Regulations, the applicant must be a U.S. citizen, lawful permanent resident of the U.S., conditional resident, asylee or refugee (protected individuals as defined by 8 U.S.C. 1324b(a)(3)), or eligible to obtain the required authorizations from the U.S. Department of State.

At CesiumAstro, we are developers and pioneers of out-of-the-box communication systems for satellites, UAVs, launch vehicles, and other space and airborne platforms. We take pride in our dynamic and cross-functional work environment, which allows us to learn, develop, and engage across our organization. If you are looking for hands-on, interactive, and autonomous work, CesiumAstro is the place for you. We are actively seeking passionate, collaborative, energetic, and forward-thinking individuals to join our team.

We are seeking a Staff Software Engineer to support several new, space-centric programs across the DoW and IC. 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.

JOB DUTIES AND RESPONSIBILITIES - Build modern full-stack applications in support of space mission systems.

- Integrate and modernize legacy space-related ground and flight software.

- Develop distributed applications leveraging microservices, cloud-native architectures, and Distributed Ledger Technology (DLT)/consensus frameworks.

- Support on-orbit and ground system integration & test, including emulation, simulation, and interface validation.

- Implement DevSecOps pipelines, automated testing, and secure software practices.

- Develop modern UI/UX interfaces for mission operators and analysts.

- Work closely with space system engineers, mission integrators, and operations teams.

- Contribute to a mission-focused engineering culture where your ideas truly shape the product.

JOB REQUIREMENTS AND MINIMUM QUALIFICATIONS - Bachelor’s degree in Software Engineering, Computer Engineering, or relevant field.

- 12+ 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.