Staff Embedded Firmware Engineer

Job Description

InnoPhase Inc., DBA GreenWave Radios™, is at the forefront of innovation in Open RAN digital radios. Our cutting-edge solutions, powered by the Hermes64 RF SoC, are designed to enhance network energy efficiency while dramatically reducing operational expenses, with purpose-built silicon that is the heart of ORAN-based active antenna arrays.

Headquartered in San Diego, California, GreenWave Radios™ has established itself as a pioneer in delivering power-efficient digital-to-RF solutions. The company is supported by a talented team of over 100 engineers spread across four global R&D facilities. With an extensive portfolio of more than 120 global patents, GreenWave Radios™ continues to push the boundaries of radio technology and innovation.

To learn more about GreenWave Radios™ and hear what our employees have to say, visit the GreenWave™ certification profile at GreatPlacetoWork.com or explore our Home - GreenWave Radios website.

As a Staff Embedded Firmware Engineer, you'll be part of a team that's revolutionizing the cellular infrastructure industry. Reporting to our principal engineer/manager, you'll be at the forefront of developing embedded firmware for our innovative radio solutions. This role is ideal for someone with deep expertise in DSP, RF technologies, and embedded systems, who is looking to make a significant impact on innovative products in the cellular infrastructure space.

This is a full-time position based in our San Diego, CA office.

Key Responsibilities

Focus on developing and optimizing digital signal processing (DSP) algorithms for both transmission (TX) and reception (RX) in 4G/5G physical layers, with key focus on timing synchronization for RF symbols, including Cyclic Prefix (CP), PRACH, and NPRACH

Design, develop, and integrate embedded firmware drivers for radio front-end, transceiver, and baseband modules

Develop and optimize firmware for embedded systems, focusing on low-level drivers and hardware interfaces

Develop and maintain real-time embedded software using RTOS(ThreadX)

Implement an extensible hardware abstraction layer to seamlessly support a variety of radio hardware configurations using a common API

Develop interfaces for hardware characterization, calibration, and tuning procedures to optimize performance

Create technical documentation for firmware architecture, design, and implementation.

Collaborate with cross-functional teams to integrate firmware with system-level applications

Optimize and design transactions for device control that meet strict timing requirements and RF spectrum emissions standards

Job Requirements

At least 8 years of experience, particularly in embedded firmware development

MS in Electrical Engineering or Computer Science preferred

Key Skills:

DSP Expertise: In-depth knowledge of DSP for TX/RX in 4G/5G physical layers

Firmware Development: Experience with lower physical layer (Layer 1) and RF driver firmware development using C programming, with a preference for experience in 5G NR or LTE

RF Measurement: Proficient in RF test equipment and signal quality analysis for wireless technology standards

RF Protocols: Understanding of RF-related alarms, Key Performance Indicators, and maintenance protocols (e.g., ORAN-MP, ORI, CPRI SW)

Coding Skills: Strong skills in embedded C and Python

Desirable Skills

Prior ARM or similar System on a Chip (SoC) product development experience

A good understanding of cellular wireless protocols (MAC/PHY)

Ability to work productively and independently

Familiar with version control tools like Git and project management tools like Jira

Team player with a strong sense of urgency to meet product needs on time

Compensation and Benefits:

Our compensation package at InnoPhase, dba GreenWave Radios, includes base pay and pre-IPO stock options. The base pay range for this role is between $140K-$225K. Your base pay will depend on the market, interview results, skills, qualifications, experience, education, and location. Our employee benefits include a comprehensive group health plan, matching 401(k), training reimbursement, and various paid leaves (vacation, sick, holidays, maternity/paternity leave, jury). Visit our website to learn more about our employee benefits.

Full-time