Senior Software Engineer - Fullstack

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.

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 is required for this position along with the ability to obtain a Secret security clearance.

Ability to travel up to 10%.

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.).

CesiumAstro considers several factors when extending an offer, including but not limited to, the role and associated responsibilities, a candidate’s work experience, education/training, and key skills. Full-time employment offers include company stock options and a generous benefits package including health, dental, vision, HSA, FSA, life, disability and retirement plans.

CesiumAstro is an Equal Opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, protected Veteran Status, or any other characteristic protected by applicable federal, state, or local law.

Please note: CesiumAstro does not accept unsolicited resumes from contract agencies or search firms. Any unsolicited resumes submitted to our website or to CesiumAstro team members will be considered property of CesiumAstro, and we will not be obligated to pay any referral fees.