Senior Spacecraft Software Integration & Test Engineer

Portal Space Systems; Bothell (WA); On-site; USD 140,000 - 195,000; Full time

Job summary

Portal Space Systems is seeking a Senior Software Integration & Test Engineer to validate spacecraft software and firmware for the Supernova platform. You will connect development and test, build HITL environments, write test code, debug across subsystems, and integrate vendor baselines into a flight-ready stack.

You will drive software reliability under mission conditions, contributing code and integration to fast, decisive spacecraft deliveries that define Portal’s approach to spaceflight.

Qualifications

• 5+ years of experience developing and testing embedded software or firmware for complex or mission-critical systems.
• Experience with hardware-in-the-loop (HITL) test environments or embedded system bring-up.
• Experience in C/C++ or Python for embedded software development and test automation.

Responsibilities

• Develop and own the execution and testing framework for spacecraft software and firmware, including HITL test cases and environments.
• Debug and resolve software and firmware issues across avionics and payload systems, driving root-cause resolution with vendors.
• Review and guide software architecture to ensure reliability and mission alignment.
• Partner with Avionics Engineers to co-develop HITL and ICD infrastructure, enabling automated regression and CI/CD pipelines.
• Own software and firmware integration from first power-on to flight-ready, ensuring subsystem bring-up and validation.
• Build and expand HITL environments to support edge cases, fault injection, and full mission simulation.
• Develop automated frameworks for regression, logging, and fault coverage to drive continuous validation.
• Own build, delivery, and versioning pipelines that ensure mission-ready software.

Skills

C/C++

Embedded systems

Python

Education

Bachelor’s degree

Master’s degree

Tools

RTOS

Embedded Linux

cFS/FreeRTOS/VxWorks

CAN/UART/Ethernet

Job description

Portal Space Systems is seeking a Senior Software Integration & Test Engineer to validate spacecraft software and firmware for the Supernova platform. You will connect development and test, build HITL environments, write test code, debug across subsystems, and integrate vendor baselines into a flight-ready stack.

You will drive software reliability under mission conditions, contributing code and integration to fast, decisive spacecraft deliveries that define Portal’s approach to spaceflight.