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Senior Staff Software Engineer - Fullstack

CesiumAstro • Embedded & Electronics Design • Satellite Communications • Travel required • Bachelor's Degree • TS/SCI • Python • JavaScript • Rust • SQL • C# • C++ • 2 months ago
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Salary
$184k – $225k per year
Location
In office (Westminster)
Seniority
Staff · 12+ years exp
Visa
H-1B filings in 12 months: 2
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 17, 2026. First seen by Alion on Aug 19, 2026. CesiumAstro scores A on the Alion truth index.

Overview
Company
Impact
Profile match

CesiumAstro

CesiumAstro is an American company founded in Austin in 2017 that builds active phased array communications payloads for satellites, aircraft and defence platforms. Its systems are software-defined and electronically steered, which lets a moving platform track several links at once without mechanical antennas, and the company manufactures them in house rather than integrating third-party subsystems. It sells mainly to defence customers and satellite operators, has raised venture funding from investors including Airbus Ventures and Lightspeed, and operates facilities in Austin, Colorado and the United Kingdom.
cesiumastro.com • HQ: Austin, United States • RF & Wireless Hardware • Embedded & Electronics Design • Satellite Communications • 1001-5000 employees • Est. 2017
Tech stack of CesiumAstro
Backed by Techstars, Kleiner Perkins, Capital Innovators

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.
  • 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.).
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