Software Engineer, Reliability (Avionics / Compute Systems)

Cowboy Space Corp.•Seattle, WA

6d•Onsite

About The Position

As a Software Engineer, Reliability, you will ensure the software powering our avionics and high-performance compute systems operates flawlessly in orbit. You will own reliability from concept through flight, building automated validation frameworks and testing compute platforms under mission-representative conditions. This hands-on role requires bridging hardware and software to optimize fault tolerance and performance. You’ll be expected to move quickly, resolve complex anomalies, and take ownership of the system stability that directly impacts mission success.

Requirements

Bachelor’s degree in Computer Science, Electrical Engineering, or a related field
4+ years of experience in software engineering, reliability engineering, or systems validation
Strong programming skills in Python, C++, or similar languages
Experience working with distributed systems, embedded systems, or high-performance compute environments
Familiarity with debugging complex system-level issues across hardware and software
Experience building automated test frameworks or validation infrastructure

Nice To Haves

Experience with avionics systems, spacecraft hardware, or embedded compute platforms
Familiarity with GPU/accelerator-based systems and performance validation (e.g., CUDA, parallel computing)
Experience with hardware-in-the-loop (HIL) testing and system integration
Strong background in performance analysis, profiling, and optimization
Experience with observability tools, logging, and telemetry systems
Understanding of fault tolerance, redundancy, and high-reliability system design
Experience operating in fast-paced, high-ownership environments (e.g., aerospace, defense, advanced hardware startups)

Responsibilities

Own software reliability for avionics and compute systems across the full lifecycle—from concept, design, radiation hardening, and integration to launch and on-orbit operations
Design, develop, and maintain automated test and validation frameworks for embedded and high-performance compute systems
Develop software to validate performance, stability, and fault tolerance of CPUs, GPUs, and custom accelerators under mission-representative conditions
Execute system-level testing including hardware-in-the-loop (HIL), environmental, and stress testing to identify failure modes
Characterize system performance (latency, throughput, resource utilization) and drive optimization across hardware/software boundaries
Investigate and resolve anomalies through deep root cause analysis, using data-driven approaches to improve system reliability
Define reliability metrics, test plans, and acceptance criteria for flight-critical systems
Work closely with electrical, avionics, and software teams to ensure robust integration of compute platforms into spacecraft systems
Build internal tools to support rapid debugging, telemetry analysis, and system observability
Support vehicle and payload bring-up, integration, and pre-flight validation efforts
Support and participate in radiation testing campaigns of avionics and compute parts