Senior Electrical Engineer

San Francisco, CA
Search for More Jobs Talk to a recruiter now 💪
This job is closed! Check out or

Our Mission

Petra's mission is to save money, property, and lives by moving utilities underground. The company is developing technology to efficiently and safely bore through any geology. Petra's innovative technology is faster and more efficient in hard rock than conventional tunneling methods, making small-diameter infrastructure economically viable.

The Role

The Senior Electrical Engineer will be a part of the product development group. The primary function of this role is to design, document, build, and test the electronics, harnessing and electrical systems of our tunneling robot, working with Robotics, Mechanical, Software and Test engineers. Support for system test setups and field deployment is also included.

About you

You are a self-starter and can tackle challenges in a fast paced, high aptitude, technical working environment. You are enthusiastic about showing your work and collaborating with fellow team members. You are able to adapt and develop quick solutions when one is not readily available. You feel a deep sense of ownership for the proper functioning of all of your designs in harsh, real-world environments. You understand the amount of documentation required to create robust systems which can be repeatedly and reliably built and troubleshooted by our team of technicians. You embody a culture of safety and grow that culture within the organization.


  • Own the design and execution of all electrical systems.
  • Design custom PCBs, harnesses and electrical system for real-time control of tunneling robot.
  • Communicate relevant electrical requirements with the software, robotics and mechanical. engineers, serving as the interface between the electronics hardware and software layer.
  • Create and Maintain documentation of electrical and electronics systems.
  • Work with test engineering to bring up and verify the complete system.
  • If necessary, support your product in field testing. 


The ideal candidate will have most, if not all, of these requirements:

  • B.S. or M.S. degree in Electrical Engineering.
  • 3+ years of experience as an electrical engineer shipping highly reliable products.
  • Fundamental understanding of analog and digital components, signals, noise, grounding, and filtering
  • Experience with microcontrollers, microprocessors, or mixed-signal designs.
  • Hands-on experience with schematic entry and PCB layout (familiarity with Altium Designer tools is a plus).
  • Strong organizational skills
  • Experience with digital signal processing
  • Switching Mode Power Supply/Buck-boost converter design experience
  • Experience troubleshooting and resolving EMI/EMC issues.
  • System design interfacing to a wide array of electro-mechanical subsystems and debugging experience.

Bonus Skills & Experience

  • Experience with PCB layout of sensitive analog and RF designs.
  • Experience designing, developing, and certifying safety rated hardware systems is desirable.
  • Experience with designing and shipping reliable hardware systems in harsh environments (e.g., extreme temperature, vibration, static, debris, etc).
  • Good understanding of communication protocols (I2C, SPI, CAN, Ethernet, etc).


  • Competitive salary and equity.
  • 401K plan.
  • Employer-sponsored health, dental and vision insurance.
  • Healthy lunch and snacks provided.
  • Monthly cell phone reimbursement.
  • Paid holidays and flexible PTO.
  • Relocation costs negotiable.

Equal Opportunity Employer

Petra is an Equal Opportunity Employer; employment with Petra is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.


1 applies


Jobs from our Partners

DevOps Engineer II

San Francisco, CA US

DevOps Engineer II

Cambridge, MA US

DevOps Engineer II

Seattle, WA US

Sr. Data Engineer

St. Louis, MO US

There are more than 50,000 engineering jobs:

Subscribe to membership and unlock all jobs

Engineering Jobs

60,000+ jobs from 4,500+ well-funded companies

Updated Daily

New jobs are added every day as companies post them

Refined Search

Use filters like skill, location, etc to narrow results

Become a member

🥳🥳🥳 340 happy customers and counting...

Overall, over 80% of customers chose to renew their subscriptions after the initial sign-up.

To try it out

For active job seekers

For those who are passive looking

Cancel anytime

Wall Of Love From Fellow Engineers

Frequently Asked Questions

  • Salaries for the engineering jobs on our site range from $100K-$200K. On average, senior engineer positions on our EchoJobs are about $160K.
  • The EchoJobs positions have been sourced and vetted from the top companies to work for in the US as a software engineer, including LinkedIn and other reputable job sites. We also have syndicated jobs from companies that have just raised funding, as well as those that have great unique products and culture. From all of these sources, our founder, Morgan, has also resourced the company's authenticity in terms of their website, public appearance, and more.
  • Yes, our users asked us for just this, so now our search filters allow you to search for your top jobs via location, as well as by onsite, remote, or both. Approximately 30% of our jobs are remote, so you’ve got the best options for you!
  • We have not yet implemented this option, but are considering doing so in the future. For the moment, you would need to cancel your subscription, and resubscribe when you wanted to come back.
  • We add new jobs to EchoJobs every day! We scan our sources for the newest jobs, verify them, and post them to EchoJobs within minutes. We add about 2,000-3,000 new jobs for you each day!
  • From starting your job search to getting hired, the entire job search process can take us software engineers anywhere between 3-6 months. However, at EchoJobs, we’re striving to shorten this duration by finding the best, newest jobs for you, so you can do less job searching, and more applying.
  • We’d recommend checking EchoJobs daily, as we add new jobs to the site each day. Additionally, if you got a chance to read our previous email on “what makes EchoJobs different from any other job search tools,” we also recommended that you set a job alert based on your job filters, so if you get emails on those new jobs, you could be checking more than once per day.
  • If you decide to continue with us after the 1-month trial, we definitely recommend this, as we all know it usually takes 3-6 months to find a quality job as a software engineer these days. So to best support you, we just adjusted our membership options at EchoJobs to monthly, 3 months, or 12 months (this option is more for passive job seekers looking a little bit for the future if they want to come back to work or make a job switch potentially. This lets you see what’s out there in case an even better fit job becomes available.)
  • EchoJobs is truly the only job site of its kind. We want to be THE spot for you to find the best job for you, and haven’t encountered any other company doing this. Other job sites are in niches besides software engineering or focus on a small portion of engineering jobs (like a specific coding language). In the words of Morgan, our founder, “I think what makes EchoJobs different is the amount of jobs, frequency that we add new jobs (we add 2,000-3,000 new jobs daily!), and the powerful search engines to find exactly the job you want more easily and efficiently. We can provide you with the most jobs that are vetted by us, we’ll continually find more new jobs for you, and we make it easier for you to apply and get hired.