CesiumAstro

Designs satellite communications hardware and software

Staff Software Engineer - Fullstack

Full-Stack EngineeringConfirmed live in the last 24 hours

Full-timeWestminster, CO, USA

About the Job

Requirements

A bachelor's degree in Software Engineering, Computer Engineering, or a relevant field.
At least 8 years of relevant software engineering experience.
Demonstrated technical leadership across software modernization or distributed systems.
Experience architecting microservices, application programming interfaces, 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 Department of Defense or Intelligence Community programs, Authorization to Operate processes, or DevSecOps on classified systems.
Experience developing in C++, C#, Rust, Python, or Go.
Experience with SQL or NoSQL database design and integration.
Experience with cloud services such as AWS, Azure, or GovCloud variants.
Experience with GitHub, Jira, and Confluence.
U.S. citizenship and ability to obtain a Secret security clearance are required.
Ability to travel up to 10%.

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 or consensus frameworks.
Support on-orbit and ground system integration and testing, including emulation, simulation, and interface validation.
Implement DevSecOps pipelines, automated testing, and secure software practices.
Develop modern user interface and user experience interfaces for mission operators and analysts.
Work closely with space system engineers, mission integrators, and operations teams.
Contribute to a mission-focused engineering culture and help shape the product.

Desired Qualifications

Existing security clearance; Top Secret/Sensitive Compartmented Information clearance is preferred.
Experience supporting Department of Defense or Intelligence Community programs.
Experience building software for spacecraft, operations 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, infrastructure as code, and automated test frameworks.
Familiarity with Distributed Ledger Technology, blockchain, or consensus protocols.
Experience with modern user interface and user experience frameworks such as React, Vue, Svelte, or Blazor.

Salary Range: 158000 to 189000 (Currency: USD) (Pay period: per-year-salary)

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.
8+ 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%.

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.).

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.

About the Company

CesiumAstro

Designs satellite communications hardware and software

CesiumAstro builds end-to-end space and airborne communications systems, combining hardware and software to connect satellites, UAVs, and ground stations. Its products include active phased array antennas, software-defined radios, and complete RF payloads that enable electronically steered links for inter-satellite communication, high-rate downlinks, lunar communications, and 5G/NTN networks. The company ships plug-and-play, commercially manufactured, full-stack systems designed to be flexible and cost-efficient, rather than bespoke one-off solutions. Its goal is to make space-based connectivity more accessible and adaptable across space, air, and ground networks for both government and commercial customers.

Company size: 501-1,000
Company stage: Series D
Total funding: $1.6B
Headquarters: Bee Cave, TX
Founded: 2017

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