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. PI261099463