> Djinni
Hardware Engineer
rf engineeringantenna designpcb layoutstm32embedded cspiuarti2cmavlinkemiemcspectrum analyzervnaoscilloscope
uavsdrloramesh networking
> full description
We are looking for a Senior RF Engineer to take ownership of the radio communication subsystem across the full development cycle — from RF hardware and antenna design to embedded firmware, system integration, testing, and field validation.
The role requires strong hands-on experience with RF hardware, wireless communication systems, antennas, and embedded development.
Responsibilities
- Design and improve RF circuits, RF front ends, and PCB layouts.
- Develop and integrate antenna solutions for compact mobile platforms.
- Work with receiver/transmitter chains, filters, amplifiers, impedance matching, and frequency synthesis.
- Develop embedded firmware for STM32-based radio modules in C.
- Integrate RF transceivers using SPI, UART, and I2C.
- Design and optimize reliable communication links, including link-budget analysis.
- Work with modulation, frequency hopping, spread-spectrum techniques, and mesh networking.
- Integrate telemetry communication with flight controllers via MAVLink.
- Identify and mitigate EMI/EMC issues and onboard interference.
- Improve communication-link robustness in interference-heavy and contested RF environments.
- Perform RF measurements using spectrum analyzers, VNAs, oscilloscopes, and related equipment.
- Conduct laboratory and field testing and support product validation and certification.
Requirements
- 5+ years of professional experience in RF / wireless communication systems.
- Proven full-cycle experience: schematic → PCB → bring-up → testing → field validation.
- Strong experience with RF hardware and antenna systems.
- Strong knowledge of STM32 and embedded C.
- Practical experience with RF measurement equipment.
- Solid understanding of digital communication systems and radio-link design.
- Experience with real-world hardware products or systems deployed in the field.
- Ability to work independently and take technical ownership of the RF subsystem.
- English sufficient for technical documentation.
Nice to Have
- Experience with UAVs, avionics, or other mobile embedded platforms.
- Experience with electronic warfare, anti-jamming, or congested RF environments.
- Knowledge of LoRa / LPWAN, mesh networks, MAVLink, or SDR.
- Experience with RF product certification.