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Ajax Systems

Lead Embedded Radio Engineer

๐Ÿ“ŒLviv, Ukraine ๐Ÿ‡บ๐Ÿ‡ฆ

โฑ๏ธŽ full-time

๐Ÿง™โ€โ™‚๏ธ senior

Ajax Systems is a full-cycle company working from idea generation and R&D to mass production and sales. We do everything: we produce physical devices (the system includes many different sensors and hubs), write firmware for them, develop the server part and release mobile applications. The team is distributed among 2 offices in Kyiv and Lviv, all technical and product decisions are made locally.

Ajax already released and continuously improves Malevich OS, which is a heart of our Hubโ€™s. Now we are looking for Embedded Radio Engineers who are ready to make our system better with us. For us never could be enough: there are still a lot of new functionality, sensors, features to make our system even cooler.

Required skills:

  • Proven experience in short range devices development for commercial products;
  • Understanding wireless technologies (e.g. Wi-Fi, Bluetooth, Zigbee, LoRa, NB-IoT) and protocols stack;
  • Work with RF tools to capture, transmit and analyze RF signals from/to radio broadcast. Vector network analyzer, signal generator, spectrum analyzer, software defined radio;
  • Knowledge about circuit/block design of RF receiver/Transmitter, frequency synthesizer, mixers, digital signal processing, antennas arrays. Understand interferer and collision in RF, methodology of resolve conflicts in RF;
  • Understands different modulation techniques (AM, FM, PM, ASK, FSK, PSK, QAM), understands emit RF spectrums depend of modulation, understands receiver sensitivity, budget of RF channel;
  • Knowledge of embedded coding techniques, interfaces (e.g. SPI, I2C, UART, CAN, RS485) and subsystems


Would be a plus:

  • Experience with ARM Cortex M (STM, Realtek, TI etc);
  • Scripting languages Python, Bash;
  • Commercial experience with specific real-time operating systems;
  • Understanding regulatory of usage radio frequency;
  • Good hands-on experience of software engineering fundamentals such as testing, continuous integration, continuous deployment, pull requests and code reviews, source control, work item/issue tracking


Responsibility zone:

  • Participate in the full embedded software life cycle for RF solutions: choise, design, implementation, code reviews, documentation, testing and validation;
  • Fine tune RF chips for best performance;
  • Create test environment to validate quality gates for radio solutions;
  • Analysis and systematic problem solving for reported issues;
  • Cooperate with electrical engineers to perform verification of new hardware from radio perspective. Review and provide feedback on the firmware specific aspects of hardware design;
  • Be ready to mentoring of newcomers|trainee coworkers


With us you will enjoy:

  • Working with a team to build an industryโ€™s future;
  • The opportunity to propose and implement own ideas that have an impact on the product and production;
  • Work in a motivated team and zero bullshit culture;
  • Non-trivial challenges and various range of interesting tasks;
  • Competitive salary;
  • Medical Insurance;
  • Corporate English;
  • Compensation for speciallized training;
  • The opportunity to participate in the beta test project of Ajax security systems โ€” receiving and testing new gadgets before their release
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  • Employment

    โฑ๏ธŽ full-time

  • Experience

    ๐Ÿง™โ€โ™‚๏ธ senior

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