Senior Electrical Engineer

Socket.dev; Coppell (TX); On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

401k with company contribution

Employee Assistance Program

Job summary

Kings III is seeking a Senior Electrical Engineer to own the hardware and firmware design for our emergency communication devices, maintaining fielded hardware while laying the groundwork for a digital, connected platform.

You’ll drive cellular hardware development, power architecture, and secure firmware updates, collaborating with cross‑functional teams to ensure compliant, scalable solutions.

Qualifications

• Bachelor’s degree in Electrical Engineering or equivalent.
• 8+ years in electrical/embedded hardware design.
• Strong schematic capture and PCB design experience.

Responsibilities

• Own electrical and firmware design across the product line from legacy to next‑gen hardware.
• Drive schematic capture, PCB layout and hardware bring‑up.
• Design cellular hardware to meet UL/FCC/PTCRB/FirstNet requirements from the outset.
• Lead firmware architecture for connected devices and OTA updates.
• Collaborate with cloud/software teams to define device‑to‑cloud data protocols.

Skills

Schematic capture

PCB layout

Firmware development (C/C++)

RTOS experience

Cellular modules integration

Power architecture design

Debugging tools (JTAG/SWD)

Education

BS in Electrical Engineering

Tools

Altium

Oscilloscopes

Logic analyzers

Job description

Description

The Role: Senior Electrical Engineer

Who You Are:

You’re a Senior Electrical Engineer who will take ownership of the hardware design of our emergency communication devices - sustaining and hardening the current product line while leading the transition to a next-generation, connected/digital platform.

This role sits at the center of that transition: you will keep today's field-deployed hardware reliable while architecting the electrical and firmware foundation for tomorrow's digital products.

Who We Are:

Established in 1989 Kings III is a growing, dynamic company. We’re a six-time winner of DFW Top Workplaces and nationally as a USA Today Top Workplace in 2020-2025. We’re on a mission for change - for our communities, our customers, and our company. If you see yourself as a builder and change agent, this is the right place for you.

More than 12% of our employees have been with the company for 10+ years, and an impressive 25% have been with us 5+ years. How do we do it? Here’s what our employees say.

What You’ll Do:

Hardware & Firmware Design

• Own electrical and firmware design across the product line — from maintaining fielded emergency phones (analog/POTS and existing cellular variants) to architecting next-generation digital/connected devices
• Drive schematic capture, PCB layout, and hardware bring-up for both legacy revisions and new digital hardware.
• Design cellular hardware to meet UL/FCC, PTCRB, and FirstNet certification requirements from the outset of next-generation device architecture.
• Design power architecture for next generation digital/connected devices, including battery backup, power management ICs, and low-power/sleep modes for cellular modules
• Lead firmware architecture for next-generation connected devices — cellular modules, embedded Linux/RTOS platforms, secure boot, OTA update mechanisms
• Design and implement communication stacks (cellular, Wi-Fi, or LTE-M/NB-IoT) integrating with cloud-based monitoring and telemetry
• Partner with cloud/software teams to define device-to-cloud data protocols and APIs
• Build in remote diagnostics, fleet health monitoring, and security (encryption, authentication, secure firmware signing) from the ground up
• Own and maintain clean, accurate design documentation — BOMs, schematics, PCB layouts, and related engineering records — across both fielded and next-generation hardware

Field & Manufacturing Support

• Root-cause field failures reported by Service and the EDC; drive corrective action from schematic/PCB level through firmware
• Manage component obsolescence, second-sourcing, and DFM/DFT issues across the product line
• Support manufacturing and test engineering for production runs, current and new

Cross-Functional & Compliance

• Work directly with Product Management (reporting line to VP Product Development) to translate roadmap into engineering requirements
• Collaborate with cross-functional teams to capture feature requirements for digital architecture and resolve recurring issues with existing products
• Support UL/FCC, PTCRB, and FirstNet certification testing for new cellular hardware revisions
• Mentor junior engineers and contractor/offshore development resources

What You’ll Bring:

• BS in Electrical Engineering or Computer Engineering (or equivalent experience); 8+ years in electrical/embedded hardware design
• Strong schematic capture and PCB design/review (Altium or equivalent); comfortable owning a board from concept through production
• Solid firmware development skills in C/C++ for microcontrollers (ARM Cortex-M or similar); RTOS experience (FreeRTOS, Zephyr, or similar)
• Experience with cellular modules (Quectel, Telit, u-blox, or similar) and IoT connectivity protocols (MQTT, TLS/DTLS)
• Debugging with JTAG/SWD, oscilloscopes, logic analyzers; strong lab bring-up skills
• Experience carrying a legacy hardware product through a connected/digital transition
• Familiarity with UL/FCC, PTCRB, and FirstNet certification processes for cellular hardware
• Experience with power architecture for battery-backed, field-deployed electronics (power management ICs, battery charging/backup, low-power design)

Nice to Have:

• Experience in life-safety, security, or emergency communications hardware
• Embedded Linux experience
• Exposure to cloud IoT platforms (AWS IoT Core or similar)

What We Do:

Our mission is simple - We provide critical communications services to help people in distress.

Our Core Values are even simpler:

1. Honesty & Integrity

2. Service to the customer above all else

3. Do what is right

4. Good enough is not good enough: pursue excellence

5. Encourage individual initiative and growth

By living and breathing our mission and Core Values every day in everything we do, Kings III is creating opportunities for individuals and reducing risk, liabilities, and costs for businesses every day.

Our primary client base includes commercial and multi-family real estate owners and property managers, and the most common areas we install our emergency phones are in elevators and at pool sides. We design, build, sell, install, service, and monitor those phones. Our Emergency Dispatch Center (EDC) provides 24/7/365 service to help dispatch local emergency services to people in distress. It’s that simple, our employees help save lives every day.

What’s in it For You:

• Medical insurance with 1 HSA and 2 PPO plan options
• Flex Spending Account (FSA)/Dependent Care FSA
• Dental, vision, life, short- and long-term disability insurance
• Critical illness and hospital indemnity plans
• 401k with company contribution
• Employee Assistance Program (EAP)
• Company paid telemedicine 24/7 access
• Wellness Program
• Employee discount program
• 8 paid holidays, plus 1 floating holiday
• 15 days of PTO accrued in year 1
• Generous referral bonus program
• Work life balance (a must!)
• Team building, attendance at our annual kickoff each January, and other fun events
• Relaxed professional dress code

Kings III is an Equal Opportunity Employer and committed to maintaining a drug-free workplace. We do not discriminate against any employee or applicant for employment because of race, color, sex, age, national origin, religion, sexual orientation, gender identity, status as a veteran, and basis of disability or any other federal, state, or local protected class.