RF Engineer

Ajax Systems
Ukraine
Workplace: OnsiteFull timeFunction: Hardware, Embedded & Systems EngineeringExperience: 3+ yearsSkills: ["Communication","Problem-solving","Teamwork"]

Join our Device R&D team as an RF Engineer responsible for the full RF lifecycle of security and automation devices. You will design and simulate antennas, optimize matching networks for 50-ohm systems, select RF components, and lead testing/validation in anechoic chambers, EMC/ EMI certification, and mass-production support across multi-band wireless platforms (GSM/LTE, Wi-Fi, Bluetooth, LoRa/Zigbee).

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Ajax Systems
Ajax Systems
7 months ago

RF Engineer

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Source: Company careers pageValidated by: Fursa AI
Last checked: 12 hours agoStatus: Live

Job Summary

Join our Device R&D team as an RF Engineer responsible for the full RF lifecycle of security and automation devices. You will design and simulate antennas, optimize matching networks for 50-ohm systems, select RF components, and lead testing/validation in anechoic chambers, EMC/ EMI certification, and mass-production support across multi-band wireless platforms (GSM/LTE, Wi-Fi, Bluetooth, LoRa/Zigbee).
Location: Ukraine
Workplace: Onsite
Employment Type: Full time
Job Function: Hardware, Embedded & Systems Engineering
Seniority: Mid level

Key Responsibilities

  • •Full life cycle RF responsibility from concept to mass production.
  • •Design and modelling of antennas for series products using EM simulators (HFSS, CST).
  • •Align and optimize RF paths (Matching Networks) for 50 ohm impedance.
  • •Component selection and optimization (RF chipsets, filters, PA, LNA) and choosing ready antenna modules.
  • •Testing and validation of RF parameters (TX/RX) in labs; EMC/EMI modelling and certification; support to production and calibration methods.

Key Requirements

  • •Minimum 3+ years as RF engineer or in related wireless systems development
  • •Hands-on experience with multi-band systems including GSM/LTE, Wi‑Fi 2.4/5 GHz, Bluetooth, and Sub-GHz (LoRa/Zigbee)
  • •Deep Wi‑Fi expertise with 2.4/5 GHz 802.11 a/b/g/n/ac/ax
  • •Antenna design and integration (FPC, PCB, Ceramic) and modelling
  • •Experience with RF test equipment (VNA, Spectrum Analyzer) and testing in anechoic chamber; knowledge of EMC/EMI and RED/FCC certifications
Experience:3+ yearsWirelessEmbeddedIoT
Skills:CommunicationProblem-solvingTeamwork
Tech Stack:VNASpectrum AnalyzerHFSSCST StudioKeysight ADSCadence AWREmbedded CSTM32

Company Brief

Ajax Systems
Designs and manufactures wireless professional security systems and smart home devices, including alarms, sensors, cameras, and communication hubs, sold globally for residential and commercial security and IoT integration.
Industry: Surveillance & Security Hardware
Company Size: Large (251 to 1,000 employees)
Growth: Scaleup
Headquarters: Kyiv, Ukraine
Founded: 2011
WebsiteLinkedIn