...Following latest filter technical trends and identifying key technology breakthroughs in the field... 

Senior Filter Engineer

We are looking for a senior engineer in filter technologies with the focus on future 5G Radio Unit (RU) solutions. Major job duties include, but not limited to, the following:
RF filter/duplexer research and development for radio base stations. Following latest filter technical trends and identifying key technology breakthroughs in the field as well as close cooperation with academic and industrial partners.


The successful candidate must be an expert in filter technologies and is capable of leading R&D activities in concept selection, design, prototyping, and mass production phases. The ability of tracking latest technical trends in filter technologies is also a basic requirement. You are expected to have 8+ years’ proven experience with high-power filters/diplexers for radio base stations in the telecom infrastructure industry and hold a master’s degree in electrical engineering or other relevant subjects. A PhD Degree in a relevant area is of course a merit.

Key technical skills for a senior filter engineer are: Solid knowledge in electromagnetic wave theory. Extensive industrial experience in R&D of filters/diplexers, e.g. metal air-cavity filters, ceramic TE/TM filters, waveguide filters, for radio base stations, including simulations, prototype evaluations, and product qualification tests. Familiar with RF measurement instruments, e.g. VNAs, spectrum analyzers, vector signal generators, and power meters etc. Good understanding of manufacturability of different types of filters.
Hands-on experiences in filter prototype tuning and troubleshooting. Proven experience in other RF passive design, e.g. antennas and phase shifters, and computational electromagnetics is a merit.

Required skills/personal characteristics
The right candidate must be open-minded and eager to share: knowledge, ideas and experiences with colleagues and should have a proven capability to pursue creative solutions. As we are a global company the candidate must be able to communicate fluently in English, both verbally and in writing. Good social and networking skills to support teamwork in project groups as well as ability to work independently is required. Good communication, documentation and presentation skills are a must.

Fluency in
ANSYS HFSS, CST Microwave Studio, Keysight ADS, etc. MATLAB.

​​​​​​​Details​​​​​​​ for the position


Kista, Sweden.

Employment conditions

Full-time consulting position. Employed by Co-Worker or sub-contractor.

Start date


Work permit/Resident card

Co-Worker assists for work permit if needed, only for employment, not applicable if sub-contracting for assignment.

​​​​​​​Contact person

Dimitris Lyris  
​​​​​​​+ 46 70 090 47 92    

Apply for position


Please update with detailed information of technical skills, competence and work experience together with responsibilities and achievements. Your educational background, patents and publications, if any. The more detailed CV, the better.


By sending your CV/Resumé you give Co-Worker Technology your consent to handle your CV/Resumé in accordance with Personal Data Act 1998: 204 (PuL). For more information, please read    
Co-Worker privacy policy