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I am a hands-on electronic circuits and PCB design engineer with over nine years of experience prototyping mixed-signal hardware, validating power electronics, and delivering robust designs from concept to production. I thrive in multidisciplinary teams and enjoy turning complex requirements into manufacturable, reliable hardware while balancing cost, schedule, and quality. My background spans large-scale energy storage systems, small-form-factor power electronics, and PCB design, with a focus on practical debugging, vendor collaboration, and product readiness. I am passionate about sustainable, socially-conscious technology and aim to contribute to innovative products that solve real-world problems. I bring strong skills in prototyping, DVT planning, BOM management, and customer support, and I enjoy mentoring teammates and coordinating with suppliers to bring robust hardware to market.…I am a hands-on electronic circuits and PCB design engineer with over nine years of experience prototyping mixed-signal hardware, validating power electronics, and delivering robust designs from concept to production. I thrive in multidisciplinary teams and enjoy turning complex requirements into manufacturable, reliable hardware while balancing cost, schedule, and quality. My background spans large-scale energy storage systems, small-form-factor power electronics, and PCB design, with a focus on practical debugging, vendor collaboration, and product readiness. I am passionate about sustainable, socially-conscious technology and aim to contribute to innovative products that solve real-world problems. I bring strong skills in prototyping, DVT planning, BOM management, and customer support, and I enjoy mentoring teammates and coordinating with suppliers to bring robust hardware to market.

Joel Hernandez II

Designer, Product Designer, Project Manager, +1

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I am a hands-on electronic circuits and PCB design engineer with over nine years of experience prototyping mixed-signal hardware, validating power electronics, and delivering robust designs from concept to production. I thrive in multidisciplinary teams and enjoy turning complex requirements into manufacturable, reliable hardware while balancing cost, schedule, and quality. My background spans large-scale energy storage systems, small-form-factor power electronics, and PCB design, with a focus on practical debugging, vendor collaboration, and product readiness. I am passionate about sustainable, socially-conscious technology and aim to contribute to innovative products that solve real-world problems. I bring strong skills in prototyping, DVT planning, BOM management, and customer support, and I enjoy mentoring teammates and coordinating with suppliers to bring robust hardware to market.…I am a hands-on electronic circuits and PCB design engineer with over nine years of experience prototyping mixed-signal hardware, validating power electronics, and delivering robust designs from concept to production. I thrive in multidisciplinary teams and enjoy turning complex requirements into manufacturable, reliable hardware while balancing cost, schedule, and quality. My background spans large-scale energy storage systems, small-form-factor power electronics, and PCB design, with a focus on practical debugging, vendor collaboration, and product readiness. I am passionate about sustainable, socially-conscious technology and aim to contribute to innovative products that solve real-world problems. I bring strong skills in prototyping, DVT planning, BOM management, and customer support, and I enjoy mentoring teammates and coordinating with suppliers to bring robust hardware to market.

Available to hire

I am a hands-on electronic circuits and PCB design engineer with over nine years of experience prototyping mixed-signal hardware, validating power electronics, and delivering robust designs from concept to production. I thrive in multidisciplinary teams and enjoy turning complex requirements into manufacturable, reliable hardware while balancing cost, schedule, and quality. My background spans large-scale energy storage systems, small-form-factor power electronics, and PCB design, with a focus on practical debugging, vendor collaboration, and product readiness.

I am passionate about sustainable, socially-conscious technology and aim to contribute to innovative products that solve real-world problems. I bring strong skills in prototyping, DVT planning, BOM management, and customer support, and I enjoy mentoring teammates and coordinating with suppliers to bring robust hardware to market.

Skills

JIRA

C++

Python

Experience Level

JIRA

Intermediate

C++

Intermediate

Python

Intermediate

Language

English

Fluent

Work Experience

Senior Designer, Hardware Development at Wärtsilä Energy Storage

February 1, 2023 - Present

Product Development for a large-scale 1500V LifePO4 BESS system; designed and wired schematics around an STM32-based controller with multi-channel digital peripheral control, ADC sensing, and debugging; designed 6- and 8-layer PCBs with functional and reinforced isolation per IEC 62368; implemented high-speed routing (Ethernet 100 Mbps, 24 MHz EMC, SPI, JTAG, CAN) to reduce propagation delay and maintain signal integrity; collaborated with contract manufacturers to meet IPC-A-600 and IPC-610 Class 3 PCB/PCB A requirements; created lab fixtures and contributed to system-level integration and de-risking activities; performed thermal, EMC, and reliability considerations; coordinated with vendors and internal teams to support NPI and mass production readiness.

Owner, Circuit & PCB Designer at SOL Circuits

May 1, 2020 - February 1, 2023

Developed a multi-layer PCB architecture for high-power battery charger modules; drafted and wired schematics around STM32-based controllers with analog/digital peripherals; performed high-speed net routing, EMI considerations, and PCB layout optimization; coordinated manufacturing readiness, DFx feedback, and BOM reasoning; engaged with fabricators and assembly houses for panelization, stencil creation, and part sourcing; reviewed and approved IC/FTC test results and prepared first articles for production ramp.

Electrical/IC Systems Engineering Intern at Center for Power Electronics Systems (CPES), Virginia Tech

August 1, 2018 - Present

Modeling & Control Design of DC-DC Converter; Supported CPES research efforts in power electronics modeling and control design; contributed to documentation and system-level analysis.

Applications Engineer (Battery Charging Products)

February 1, 2016 - March 1, 2020

Participated in a rotation program focused on battery charging product development; supported customers with test procedures, feature validation, and on-site technical support; collaborated with engineering, sales, and marketing to align product capabilities with market needs; contributed to customer-facing training materials and field deployments.