Software Engineer, Reliability (Avionics / Compute Systems)

Aetherflux • Seattle, WA

1d

About The Position

Aetherflux is solving the global energy crisis by building the infrastructure for abundant, resilient space-based solar energy. We are tackling one of humanity’s most complex engineering challenges with a world-class team dedicated to delivering a revolutionary power platform. Aetherflux is transforming how civilization powers, computes, and connects—from orbit to Earth.
Background
Aetherflux is building the infrastructure to power and connect the orbital economy. Our modular, scalable satellites collect sunlight in Low Earth Orbit to enable multiple integrated applications: powering on-orbit high-performance computing clusters (GPU/TPU), providing secure, high-bandwidth optical data transport, and delivering energy via infrared lasers (space-to-earth and space-to-space).
Current energy and data systems rely on complex logistics and outdated infrastructure. Aetherflux overcomes these challenges by enabling direct, on-demand, secure, and scalable energy distribution and data processing from space. This will fundamentally change how we operate in orbit and on Earth—supporting the rapidly expanding space industrial base, ISAM (In-Space Servicing, Assembly, and Manufacturing) operations, remote regions, and mission-critical environments.
Aetherflux was founded in 2024 by Baiju Bhatt. Inspired by his father’s work with NASA Langley Research Center, Baiju earned his B.S. in Physics and M.S. in Mathematics at Stanford before co-founding Robinhood, now a public company that has helped over 20 million Americans access the financial system.
Aetherflux has raised $90 million from Index Ventures, Interlagos, Construct Ventures, Breakthrough Energy Ventures, Andreessen Horowitz, NEA, and others.
This is an ambitious mission that demands extraordinary talent. Aetherflux’s team has worked at places like SpaceX, Astranis, NASA, Anduril, and the U.S. Navy, and is based in San Carlos, CA. If you're ready to solve complex technical challenges and help build a generational energy and infrastructure company, we want to hear from you.

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

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

Benefits

• Equity in Aetherflux
• Employees and their eligible dependents may enroll in medical, dental, and vision insurance
• 401(k) retirement savings plan
• Paid time off
• 10 paid holidays per calendar year
• Paid leave for new parents
• Relocation assistance
• Daily lunch in the office and a fully stocked kitchen with beverages and snacks

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level