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 Hub’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 industry’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 — receiving and testing new gadgets before their release.

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