About Rain:
At Rain AI, we’re creating a future with abundant and scalable artificial intelligence. We're building the world’s most cost and energy efficient hardware for AI. Our products achieve an order of magnitude improvement over the status quo by co-designing every layer of the AI stack, from circuits to algorithms. Our ultimate goal is to become the dominant hardware company of the AI era.
About the Role
We're seeking an experienced Firmware Engineer to join our software organization. In this role, you'll develop and optimize firmware—from bootloaders to drivers—to ensure that ML workloads run efficiently on our custom platform. The ideal candidate has deep expertise in embedded systems and operating systems, along with a passion for solving challenges at the hardware-software interface.
This is a remote role – you can work from anywhere in the United States.
Responsibilities
Develop core firmware (bootloaders, secure boot, device drivers) for high-throughput ML platforms
Optimize scheduling and resource management for ML workload execution on multi-core systems
Implement RISC-V solutions with RTOS (FreeRTOS, ZephyrOS) for scaled deployments
Execute platform bring-up, validating complex compute/memory subsystems (e.g. HBM, multi-core control system)
Debug system-level issues through log analysis and cross-team collaboration
Required Qualifications
BS in Computer Science, Computer Engineering, or related fields
Strong background in firmware/embedded development, ideally 5+ years
Hands-on experience with RTOS implementations on ARM, RISC-V, or x86 architectures
Experience in platform bring-up with complex SoCs and interfaces (e.g., PCIe, Ethernet, HBM)
Excellent programming skills in C/C++/Rust
Experience with multi-core optimization in high-bandwidth systems
Passion for learning new architectures and optimizing system performance
Strong communication skills, both written and verbal
Ability to work successfully in a distributed and remote environment
Preferred Qualifications
MS or PhD in Computer Science, Computer Engineering, or related fields
Familiarity with ML accelerator architectures and dataflow patterns for neural networks
Contributions to open-source firmware projects, particularly in system optimization
Experience implementing security features (secure boot, cryptographic protocols, hardware security modules)
Experience building debug tooling (system monitors, trace analyzers, debug protocol stacks)
Our Benefits:
Medical Insurance with 100% coverage of employee premiums
Dental and Vision Insurance
401k match
Unlimited PTO + all federal holidays
Two weeks off around Christmas and New Years
Summer “shutdown”: one week-off for all employees
Work from anywhere in the United States
$500 of office equipment per year
And more!
$220K – $260K • Offers Equity
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