Posted by the employer · Seattle, United States
Principal Flight Software Engineer
K2 Space · Seattle · United States
Posted: 7/1/2026 · On the employer's job feed since 10/11/2026
The advert
Quoted in full from K2 Space's job posting. Gavroche does not edit it.
K2 is building the largest and highest-power satellites ever flown, unlocking performance levels previously out of reach across every orbit. Backed by over $1 billion in total funding from leading investors including Altimeter Capital, ICONIQ, Kleiner Perkins, Lightspeed Venture Partners, Redpoint Ventures, and T. Rowe Price — and with over $1 billion in signed contracts across commercial and US government customers, we're mass-producing the highest-power satellite platforms ever built for missions from LEO to deep space.
The rise of heavy-lift launch vehicles is shifting the industry from an era of mass constraint to one of mass abundance, and we believe this new era demands a fundamentally different class of spacecraft. Engineered to survive the harshest radiation environments and to fully capitalize on today's and tomorrow's massive rockets, K2 satellites deliver unmatched capability at constellation scale and across multiple orbits.
With multiple launches in 2027 and plans to scale to 100 satellites a year, we're Building Bigger — helping develop the solar system and build toward a Kardashev Type II (K2) civilization. If you are a motivated individual who thrives in a fast-paced environment and you're excited about contributing to the success of a high-growth Series D-funded company, we'd love for you to apply.
The Role
The software team at K2 strives to blur the lines between the various types of software development and encourages team members to get into parts of the stack they may not otherwise have experience with. This spectrum includes GNC algorithms (Rust, C++), application software on flight computers (Rust, C++), to embedded software on microcrontrollers (Rust, C++),to operating systems (Rust, C++, C), to HDL programming (VHDL, SystemVerilog), to test systems (Python), and many things inbetween. By doing this, we create a stronger team with more capable engineers. For now, this does not include front-end, artificial intelligence, or machine learning development.
As a part of the team, you will be responsible for the development and verification of the software used to fly some of the largest spacecraft that have ever been flown. You will be able to write mission-critical code that controls propulsion systems, attitude control systems, and power systems to ensure safe and reliable operation of the vehicle. In your first 6 months you will developcore pieces of the software architecture including the strategies for fault tolerance, real-time control, and telemetry downlink. In your first year you will implement larger software systems and begin verifying your code using both software and hardware in the loop simulators. In your first two years you will operate your code on multiple spacecraft, demonstrating robust performance in demanding missions.
Responsibilities
- Create software architecture for real-time, fault tolerant control of a 20kW+ spacecraft
- Develop software applications for control of spacecraft subsystems, including propulsion, guidance/attitude control, thermal, power, and communications systems
- Design and implement state machines for robust operation of the spacecraft
- Create and utilize robust tools to allow for rapid deployment of quality code
- Perform data analysis and anomaly investigation to identify and resolve software bugs
- Support integration and testing of the spacecraft subsystems
- Build and maintain infrastructure to increase reliability when developing and testing software
Qualifications
- Bachelor's degree in computer science, computer engineering, electrical engineering, math, or a STEM discipline or 10+ years of professional experience in software engineering
- Development experience in Rust, C/C++, Python, VHDL, SystemVerilog
Nice to Have
- Experience with spacecraft flight software development
- Fluency with Linux systems programming and driver development
- Experience with continuous integration and continuous delivery systems
- Experience building or working with hard real-time embedded systems (bare-metal or RTOS)
- Basic knowledge of electronics, computer architecture, and control systems
- Experience developing or working with state machines
- Experience with software verification and testing methods
- Experience with software and network performance analysis and debugging
- Experience with implementing Extended Kalman Filters for inertial sensors
- Experience with fault tolerant software design and implementation
- Experience defining and creating test systems for both hardware-in-the-loop and hardware-out-of-the-loop
Compensation and Benefits:
- Base salary range for this role is $200,000 - $240,000 + equity in the company
- Salary will be based on several factors including, but not limited to: knowledge and skills, education, and experience level
- Comprehensive benefits package including paid time off, medical/dental/vision/ coverage, life insurance, paid parental leave, and many other perks
If you don’t meet 100% of the preferred skills and experience, we encourage you to still apply! Building a spacecraft unlike any other requires a team unlike any other and non-traditional career twists and turns are encouraged!
If you need a reasonable accommodation as part of your application for employment or interviews with us, please let us know.
Export Compliance
As defined in the ITAR, “U.S. Persons” include U.S. citizens, lawful permanent residents (i.e., Green Card holders), and certain protected individuals (e.g., refugees/asylees, American Samoans). Please consult with a knowledgeable advisor if you are unsure whether you are a “U.S. Person.”
The person hired for this role will have access to information and items controlled by U.S. export control regulations, including the export control regulations outlined in the International Traffic in Arms Regulation (ITAR). The person hired for this role must therefore either be a “U.S. person” as defined by 22 C.F.R. § 120.15 or otherwise eligible for a federally issued export control license.
Equal Opportunity
K2 Space is an Equal Opportunity Employer; employment with K2 Space is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.
Similar roles in Seattle
- Senior Software Engineer - 10375 · Extreme Networks, Seattle
- Senior Software Developer - Web Applications · CIeNET International, Seattle
- Principal Software Engineer - 10382 - 10385 · Extreme Networks, Seattle
- Senior Software Engineer-Gen AI,Machine Learning,Distributed Systems,Cloud Platforms - 10387 - 10388 - 10389 · Extreme Networks, Seattle
- Senior Software Engineer II - Managed Databases · DigitalOcean, Seattle
- Software Engineer - High Availability and Disaster Recovery · Stripe, Seattle
200 open software engineer roles found; at most three per employer shown. Source: Direct employer job feeds (ATS) and career sites crawled by gavroche-direct.
What software engineer adverts in Seattle state
Middle half: 183,600 – 222,000 USD a year; median 196,000 USD.
From 87 adverts by 20 employers that state a salary (annualised). Source: Direct employer job feeds (ATS) and career sites crawled by gavroche-direct; salaries read from the adverts' own text.
How software engineer roles in United States are worked
3% fully remote · 1% hybrid · 96% on-site
From 429 adverts whose ATS states a work mode. Source: Direct employer job feeds (ATS) and career sites crawled by gavroche-direct; the employers' own work-mode flags (adverts without one count as on-site).
New roles in Seattle, last 12 weeks
- 7/20/2026 19
- 7/27/2026 33
- 8/3/2026 34
- 8/10/2026 38
- 8/17/2026 41
- 8/24/2026 40
- 8/31/2026 72
- 9/7/2026 59
- 9/14/2026 97
- 9/21/2026 106
- 9/28/2026 88
- 10/5/2026 90
717 vacancies. Source: Direct employer job feeds (ATS) and career sites crawled by gavroche-direct; vacancies by their own publication week.
Other roles at K2 Space
- Senior Ground Software Engineer · Seattle
- Senior Flight Software Engineer · Seattle
- Flight Software Engineer · Los Angeles
- Application Software Engineer · Los Angeles
- Principal Flight Software Engineer · Los Angeles
- Ground Software Engineer · Los Angeles
214 open. Source: Direct employer job feeds (ATS) and career sites crawled by gavroche-direct.