RF Embedded Systems Engineer (IoT + DoD Sensors)

Overview

LMI is a new breed of digital solutions provider dedicated to accelerating government impact with innovation and speed. Investing in technology and prototypes ahead of need, LMI brings commercial-grade platforms and mission-ready AI to federal agencies at commercial speed.

Leveraging our mission-ready technology and solutions, proven expertise in federal deployment, and strategic relationships, we enhance outcomes for the government, efficiently and effectively. With a focus on agility and collaboration, LMI serves the defense, space, healthcare, and energy sectors-helping agencies navigate complexity and outpace change. Headquartered in Tysons, Virginia, LMI is committed to delivering impactful results that strengthen missions and drive lasting value.

Responsibilities

The Opportunity

We're hiring a Senior RF Embedded Systems Engineer to lead the design, development, and prototyping of our next-generation IoT tracking devices. You'll be the first technical hire on the hardware engineering side-owning circuit design, firmware, integration, and RF performance in a tight feedback loop with product and manufacturing teams.

This is a high-impact, hands-on role where you'll take a concept from napkin sketch to functional prototype, validate performance, and work closely with our GM of Hardware and contract manufacturers to scale it into production.

What You'll Do

• Design and prototype embedded systems for low-power, RF-connected devices (LoRa, LTE-M, BLE, GNSS, etc.).
• Develop and debug firmware on microcontrollers using C/C++
• Design and test RF circuits, antennas, and matching networks for reliable comms in field environments.
• Build and validate custom PCBs (schematics, layout guidance, component selection).
• Conduct bench-level testing, including signal analysis, power profiling, and RF range validation.
• Implement FIPS 140-3 compliant encryption and secure boot mechanisms to meet DoD cybersecurity requirements.
• Create test plans and documentation for transitioning prototypes to manufacturing.
• Collaborate closely with contract manufacturers and hardware leads to support DFM, DFT, and QA workflows.
• Support FCC, TAA, or MIL-STD pre-certification efforts as needed.

Qualifications

What We're Looking For

• 5+ years of experience designing embedded systems with integrated RF components.
• Strong knowledge of RF fundamentals, modulation, and low-power wireless protocols.
• Experience with embedded firmware development and debugging in constrained environments.
• Proficient in lab testing with tools like oscilloscopes, spectrum/network analyzers, and signal generators.
• Familiarity with implementing FIPS-compliant cryptographic modules and secure key storage.
• Able to take full ownership of board bring-up, debug, and field validation.
• S. Citizenship with the ability to obtain and maintain a government security clearance.

Bonus Points For

• Experience with LoRa, LTE-M/NB-IoT, GNSS, UWB, or BLE in constrained environments.
• Previous work in DoD, aerospace, industrial IoT, or high-reliability sectors.
• Familiarity with Altium, KiCad, or similar for schematic capture and layout review.
• Python, MATLAB, or similar for signal/data processing and RF analysis.
• Hands-on experience with environmental or EMI/EMC testing workflows.
• Open-source hardware or firmware contributions.

Why This Role Matters

You won't just be coding firmware or simulating RF-you'll be building the foundation of a new hardware product line that's headed straight into real-world military use. You'll see your designs go from bench to battlefield.

Build cool tags. Apply today.