RF Engineer – Cellular Modules

About the role

Quectel Wireless Solutions, a global IoT technology developer and cellular module supplier, is expanding its business in Serbia and growing its R&D centre in Belgrade. It is looking for a motivated RF Engineer to work on-site, Monday to Friday, with a flexible start between 7:30 and 9:30 AM.

Key responsibilities

• Design and develop RF hardware for 2G/3G/4G/5G cellular modules and PCBA projects, including RF schematics and PCB layouts.
• Review customer schematics, PCB layouts and antenna implementations, giving technical recommendations and corrective actions.
• Debug and troubleshoot RF issues such as receiver sensitivity, transmit power, spurious emissions, interference, GNSS and antenna performance, and certification failures.
• Design, evaluate and optimise RF circuits, including tuning and matching networks, to meet 3GPP test requirements.
• Evaluate and validate RF components, and perform R&D testing and RF performance evaluations of modules and evaluation boards.
• Support customers with design-in, technical workshops and on-site assistance, and take part in schematic design, PCB layout reviews, BOM selection and test planning.
• Support prototype debugging, pilot and mass production introduction, and cost-reduction and certification optimisation.
• Prepare technical documentation, design review reports and failure analysis reports, and work with hardware, R&D, testing, quality and certification teams.

Required profile

• Bachelor's degree or above in RF Engineering, Electronics Engineering, Telecommunications or a related field.
• 1-3 years of experience in RF hardware development, RF design or customer RF technical support.
• Ability to analyse technical issues independently, identify root causes and propose practical solutions.
• Good written and spoken English; knowledge of Chinese or Serbian is an advantage.
• Willingness to travel and provide on-site customer support when required.

Required skills

• RF circuit design, schematics, PCB layout and RF component selection.
• Understanding of 2G/3G/4G/5G cellular technologies and RF performance requirements.
• Experience with RF testing, debugging, troubleshooting and performance optimisation.
• Advantageous: antenna implementation, RF matching and tuning, 3GPP testing, familiarity with Quectel cellular module RF design.

What we offer

• An international environment and open, honest teamwork.
• Continuous learning and development opportunities.
• A profit-sharing scheme based on the company's success in the previous year.
• Social and employee events, including annual team building, a modern office and work on cutting-edge technologies.
• Private medical insurance.