L1/PHY Firmware Engineer

As a L1/PHY firmware engineer, you will be developing NB-IoT Physical Layer and L1 Layer DSP/firmware for Cellular IoT modem. The L1/PHY firmware is responsible for managing the baseband and RF ICs, controlling the Software Defined Radio (SDR), scheduling DSP tasks, and communicating with the upper layers of the NB-IoT software stack.

As L1/PHY engineer, you will be also responsible for the firmware integration, quality, and conformity of the FW. The platform you will be working on uses Altair’s newest highly integrated and super low power chipset, designed especially for the IoT market. In this role, you will learn to develop and adapt the methodologies and work procedures to deliver an excellent, super low power, and stable NB-IoT L1/PHY software solution on Altair’s unique modem architecture.


  • Embedded firmware development for Cellular IoT modem product and/or DSP development
  • Implementation of software APIs with lower (DSP) and upper (L2 and above) software
  • Mapping modem algorithms and platform requirements into DSP and firmware components


  • BSC or MSC graduate in electrical engineering, computer science or applied mathematics. Student in very late phase of studies may be considered
  • Excellent engineering skills – problem solving, pragmatic approach, broad system view
  • Experience in developing and debugging code
  • Knowledge of wireless modem technology, preferably cellular modems and related technologies – an advantage
  • Understanding of fixed point concept and trade-offs
  • Fluent oral and written communication skills in English

This position is located in Finland

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