We are currently hiring a full-time Embedded Systems Engineer to join our team. In this role you will assist in designing, implementing, and testing embedded software and hardware systems for mixed-signal electronics applications such as switch mode power supply and battery management system applications. Candidates should be passionate about hardware and software integration of electronics, and even more passionate about creating a more sustainable future. We are looking for highly motivated self-starters comfortable in an early stage company environment. You would work with and report directly to our Sr Embedded Systems Engineer as part of the engineering team. This is an on-site position, with a hybrid-work option.

Responsibilities:

• Designing and implementing software and hardware solutions for bare-metal and linux-based applications

• Helping to define system-level requirements, while considering targeted user experience

• Participating in regular planning sessions and design reviews with other engineers to ensure synchronization among teams

• Creating infrastructure for automated testing and deployment of application code

• Monitoring, debugging, and maintaining IoT-connected devices in the fieldFinding solutions to complex issues and quickly test assumptions on the fly in a fast-paced environment

• Building a cleaner future with unprecedented battery data and analysis that will maximize the value of every battery

Minimum Qualifications:

• 1-3 years of experience in Embedded Software, Embedded Systems, or Hardware Engineering roles

• Hardware test and debugging using DMM, Oscilloscopes, Logic Analyzers, etc.

• Experience with Modbus, CAN, Ethernet, UART, SPI, I2C, or similar protocols

• Experience programming in C/C++ for RISC-based systems like Atmega, PIC32, etc.

• Knowledge of python 3.0+ ecosystem, best practices and tools (e.g. notebooks, pip, pyenv, virtual environments, etc.)

Preferred Qualifications

• Ability to read schematics using capture/PCB layout software (e.g. Altium, KiCad, etc.)

• Familiarity with FPGAs and/or CPLDs using Verilog or VHDL for Xilinx or equivalent

• Basic knowledge and experience with linux OS and git development flow

• Technical writing and documentation

Salary Range: $72k to $99k annually

Send your resume to Steven Jmaev (sjmaev@rejouleenergy.com)

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We have received a high number of appicants for this role, so please expect a delayed response. Thanks for your interest and we apologize for the inconvenience.

We are currently looking for a renewable energy engineering intern to join our team in-person this summer at our location in Signal Hill, CA.

In this role you will participate in the design of microgrids and battery systems, along with building and testing hardware. Candidates should be passionate about building things to solve tangible problems, and even more passionate about creating a more sustainable future. We are looking for a highly motivated self-starter comfortable in an early stage company environment. You would work directly with our engineers and report to our Senior Battery Applications Engineer.

Start date is flexible, although we require a minimum of 12 weeks.

Responsibilities:

• Assist in the design and development of solar microgrids with battery energy storage systems, including system sizing, electrical drafting, and drawing productions.

• Interpreting national electrical, building, and fire codes to help assemble permit packages.

• Follow verbal and written test procedures to set up test fixtures, and perform tests on engineering designs.

• Collaborate with software, battery modeling, and mechanical engineering teams to assist and conduct certification testing (UL) of electronic and energy storage systems.

• Quantify environmental, economic, and societal impacts and benefits of energy systems.

Minimum Qualifications:

• Currently pursuing a degree in Energy Engineering, Electrical Engineering, or a related field.

• Familiarity with renewable energy systems.

• Experience with electrical design/drawing software.

• Familiarity with basic electromechanical tools: soldering irons, screwdrivers, wrenches, allen keys, wire cutter/stripper/crimpers, and power drills

• Ability to lift 45 pounds for short periods of time throughout the day

• Clear ability to read mechanical drawings, electrical schematics, datasheets, manuals and troubleshoot systems from other similar documentation

Preferred Qualifications

• Understanding of fundamental techno-economic concepts as well as environmental impacts and analyses

• Experience with microgrid and solar design along with related software (Helioscope, HOMER, Energy Toolbase, etc. )

• Basic programming knowledge, preferably Python

• Experience with CAD software, preferably Onshape

Pay Range

$20-$30/hour

Please submit your resume and cover letter to Brandon Simons (bsimons@rejouleenergy.com) with the subject line “Renewable Energy Engineering Intern - Summer 2024”.

Apply now

We are currently hiring an electrical engineering intern to join our team in a part-time capacity, 20-24 hours per week starting as soon as April, 2024 with the possibility of converting to a full-time entry-level position. Due to the nature of the work, the intern must be able to work in person in our Signal Hill, CA facility 100% of the time.

In this role you will participate in bring-up and basic testing of PCBs, wiring and testing of low voltage and high voltage electronics, electrical systems, and batteries along with working with other engineering teams on hardware validation. Candidates should be passionate about building things to solve tangible problems, and even more passionate about creating a more sustainable future. We are looking for highly motivated self-starters comfortable in an early stage company environment. You would work directly with our Engineers, and report to our Hardware Systems Manager.

Job Responsibilities:

• Follow written test procedures and verbal instructions to bring up PCBs or test fixtures, and perform validation tests

• Assist in wiring of a fully integrated high voltage battery diagnostics product

• Collaborate with multidisciplinary software, battery modeling, and mechanical engineering teams to test quality of a fully integrated battery diagnostics product

• Assist in documenting design and test reports.

• Find solutions to complex issues and quickly test assumptions on the fly in a fast-paced environment

• Collaborate with Hardware Systems Manager to develop QA testing methods and processes and documentation

Minimum Qualifications:

• 4th or 5th year student pursuing a degree in Electrical Engineering or related electronics engineering field

• Familiarity with basic electronics test equipment, such as DMMs, power supplies, oscilloscopes

• Familiarity with basic tools, such as screwdrivers, wrenches, allen keys, wire strippers

• Familiarity with electrical fundamentals (polarity, ohm’s law)

• Extremely detail oriented, especially to ensure strict adherence to testing and safety protocols

• Ability to lift 45 pounds for short periods of time throughout the day

• Excellent written, verbal, critical thinking and problem solving skills, team-player

• Ability to read basic mechanical drawings, electrical schematics, datasheets, and troubleshoot systems from said documentation

Preferred Qualifications

• Familiarity with advanced test equipment such as programmable power supplies, e-loads, automated testers, use of differential probes

• Familiarity with NFPA 70E and High Voltage Safety

• Comfortable working with batteries (lithium, lead-acid, etc.) in various configurations

• Skills: Soldering, Wire Harness Assembly, Power Tools

• Basic programming knowledge (Python, C)

• Familiarity with CAD software, preferably OnShape or SolidWorks

Pay Range

$20-$30/hour

Please submit your resume and cover letter or relevant project report to Hernan Acevedo (hacevedo@rejouleenergy.com) with the subject line “Electrical Engineering Intern”.

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With support from the Department of Energy and the California Energy Commission, we’re building long-duration energy storage demonstration systems to power two affordable housing communities and a Native American workforce development campus. But how do we ensure that these projects actually help the intended beneficiaries? How can we make the perspectives of the communities where we’re building these systems part and parcel of the design and execution of our projects? How do we evaluate our work, to ensure that we learn from our mistakes and replicate the successes? We’re looking for an experienced project manager with a background in a field that may include human-centered design, qualitative research, anthropology, or sociology who can help us with all of this.

We seek that rare candidate who straddles the divide between academia and what others call the real world, a critical thinker who knows how to get things done and may even have a gift for navigating red tape (there will be a lot of that). You’ll need to be talented at listening, observing, writing fieldnotes, gaining trust with project partners, and conducting qualitative interviews.

We’re open to remote work with some travel to sites or having a new face at our Signal Hill, California, office. The job can be full-time or, particularly as we ramp up, on a steady part-time basis. But we hope to find someone eager to work at this for at least three years. Continuity is important in building rapport with project partners. California residency or openness to relocating is required.

Responsibilities:

• Employ the principles of human-centered design and participatory research to enrich the community impact of our work.

• Serve as a liaison between the host sites and other project partners, including ReJoule, the Department of Energy, workforce development agencies, and contractors, with the best interests of all at heart.

• Design and prepare a series of reports for the DOE, turning what others might see as bureaucratic hurdles into a creative mission-driven collaboration with our host communities. These reports include:

• A community benefits plan for each site

• Environmental impact reports

• A social characterization assessment

• A stakeholder analysis

• An account of harm reduction strategies

• Coordinating with workforce development agencies

• Strategies for benefiting American workers and furthering the goals of diversity, equity, and inclusion

• An assessment of how our work advances the goals of the federal Justice 40 initiative.

• Offer user-experience insights on our energy storage systems and battery diagnostic devices.

• We’re open to remote work with some travel to sites around the US.

Minimum qualifications:

• Prior project management experience

• Familiarity with renewable energy technologies

• Ability to thrive in remote and hybrid work environments

• Strong listening and interpersonal skills

• Experience with qualitative interviewing

• Familiarity with MS Office tools such as Word, Excel, Powerpoint, or equivalent tools such as Google Workspace

• Bachelor’s degree

Preferred qualifications

• Prior work with Native American communities is a big plus, as is experience with labor unions.

• A commitment to the possibilities of participatory research and genuine community engagement is indispensable.

• A background in user-experience is valuable.

• Formal training in project management

• We encourage candidates with graduate level training to apply but will consider those with a BA, relevant experience, and a sharp mind.

Pay Range: $60,000 to $105,000 annually

How to apply

If this sounds like the job for you, please send a CV and a brief cover letter to Tobias (thecht@rejouleenergy.com) making sure to describe what interests you about the opportunity.

Apply now

We are currently hiring 2 technicians to join our team in a part-time capacity, 20-24 hrs/week, starting in May 2024. This contract can be for up to six months with the possibility of converting to a full-time position. Applicants must be able to work in person in our Signal Hill, California, facility 100% of the time.

In this role you will participate in the testing and implementation of high voltage electronics, electrical systems, and batteries. Candidates should be passionate about solving real problems and about creating a more sustainable future. We are looking for highly motivated self-starters comfortable in an early stage company environment. You would work directly with our engineers and scientists and report to our senior battery applications engineer and/or hardware systems manager.

Responsibilities:

• Set up test fixtures and perform tests on various electrical systems including high voltage battery packs and electric vehicles, carefully adhering to safety codes and written and verbal instructions

• Coordinate with multi-disciplinary software, battery modeling, electrical and mechanical teams to test a fully integrated battery diagnostic product

• Coordinate and conduct UL testing of electronic and energy storage systems

• Create wire harnesses and assemble hardware components

• Document all design and test methodologies

• Find solutions to complex issues and quickly test assumptions in a fast-paced environment

• Build a cleaner future with better battery data and analysis that will maximize the value of every battery.

Minimum Qualifications

• Familiarity with electrical test equipment such as DMMs, power supplies, and e-loads

• Familiarity with tools: screwdriver, wrenches, allen keys, wire cutters, power drills, etc.

• Be extremely detail oriented and determined to always adhere to safety protocols

• Have the ability to lift 45 pounds for short periods of time throughout the day

• Have excellent critical thinking and problem solving skills

• Know how to read mechanical drawings, electrical schematics, datasheets, manuals and troubleshoot systems from other similar documentation

Desired Qualifications:

• Familiarity with NFPA 70E and High Voltage Safety

• Ability to drive a forklift

• Experience working with batteries (lithium, lead-acid, etc.) in various configurations

• Skills: Soldering, wire harness assembly, advanced tooling

• Basic programming knowledge (Python, C)

Pay range: $18/hr to $25/hr

To apply to this role, please send your resume and cover letter to Brandon Simons (bsimons@rejouleenergy.com) with the subject line “Electromechanical and Battery Technician”

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We are actively hiring a Battery Energy Storage Systems (BESS) Engineer. The BESS Engineer will oversee the design of second-life battery energy storage system (2LBESS) projects. Your goal is to oversee design, permitting, deployment, and monitoring for our next four long duration energy storage (LDES) second-life BESS. You will work directly under the CTO in this role. This is an on-site position, with a hybrid-work option. If you love working with energy systems, have a knack for powering gadgets and tinkering with electronics, enjoy solving tough technical challenges, and want to join a fun and dynamic team doing world-changing work, this job is for you.

Responsibilities:

• Lead the design of second-life battery energy storage system (BESS) for commercial & industrial projects. Provide system design and drawings for BESS solutions.

• Work with project success teams to interpret fire, electrical, and building codes to develop and submit documents for permitting packages, including design drawings, datasheets, and single line diagrams communication wiring diagrams, commissioning and decommissioning plans

• Interface with internal stakeholders, eg. project managers, product engineers, sales team, and external stakeholders, utilities, AHJs, contractors, end customers, to ensure project success

• Work with team members to procure electrical subcomponents such as inverters, EMS, FACP, safety subsystems, cabling, and more.

• Work with team members to submit design and progress reports for grant projects

• This is a diverse role where knowledge of basic design rules, constructability, permitting, utility requirements, and engineering fundamentals is expected. Expectations include a rock-solid work ethic and a strong team-oriented personality.

• Collaborate closely with software, electronics, mechanical, and other engineering teams to integrate 2LBESS into multiple projects.

• Mentor junior engineers, providing guidance on best practices, and contribute to the professional development of the mechanical engineering team.

• Manage project timelines, budgets, and resources effectively, coordinating tasks to meet project milestones and deliverables.

• Track issues and drive root cause identification and resolution with cross-functional teams.

• Drive continuous improvement initiatives, identifying opportunities for enhanced efficiency and innovation.

Minimum qualifications:

• BS in Electrical, Mechanical, or equivalent

• 3 years experience working with battery energy storage and battery management systems (BMS)

• Working knowledge of BESS standards and codes

• Familiarity with MS Office tools such as Word, Excel, Powerpoint, or equivalent tools such as Google Workspace

• Ability to thrive in remote and hybrid work environments

Salary range: $90,000 to $130,000

To apply to this role, please send your resume and cover letter to us at info@rejouleenergy.com with the subject line “BESS Engineer - <your name>”.