Senior RF-design engineer

SiNIX; Göteborgs kommun; On-site; SEK 900,000 - 1,100,000; Full time

Job summary

SiNIX is seeking a driven Senior RF Design Engineer to join our R&D hardware team at our Gothenburg headquarters. You will develop advanced RF electronics for high-performance systems where reliability matters.

You will own your work, collaborate across international teams, and contribute to system architecture, design verification, and production readiness. The role emphasizes hands-on hardware development, lab measurements, and mentoring junior engineers.

Qualifications

• M.Sc. in Electrical Engineering, RF Engineering, Engineering Physics or a related field.
• Experience with RF circuit design, including RF front ends, on PBA level.
• Experience with RF simulation tools such as Keysight ADS or Ansys HFSS.
• Experience with antenna design and optimization.
• Experience with RF test and verification using VNAs, spectrum analyzers and signal generators.
• Knowledge of EMC and regulatory requirements for RF emissions.
• Solid experience with PCB/PBA toolsets such as Cadence, Siemens or Altium.
• Strong problem-solving skills and attention to detail.
• Ability to work effectively in a collaborative team environment.
• Fluent in English (written and spoken).
• Meritorious with experience of RF system architecture.
• Meritorious with mixed-signal experience (ADC/DAC) and clocking.
• Meritorious with test automation using Python or MATLAB.
• Meritorious with experience of Cadence PCB/PBA design tools.
• Meritorious with experience of hi-rel electronics design for demanding environments, such as aerospace or space.
• Meritorious with experience of mentoring junior engineers.

Responsibilities

• RF Circuit Design: Develop robust, high-performance RF circuits on PCB/BA level.
• RF front ends: Design low-noise amplifiers, mixers, filters and power amplifiers.
• Layout support: Realize solutions through component selection and layout guidance.
• High reliability: Design for harsh environments, derating and long lifecycles.
• RF Simulation and Layout: Simulate circuits and define stack-ups and transitions.
• Antenna Design: Design, simulate and optimize antennas for various applications.
• Mixed-Signal integration: Combine RF, data converters and clocking with digital processing.
• System Architecture: Bridge system-level concepts into RF domain and study future solutions.
• Bring-Up and Testing: Drive board bring-up and characterize with VNAs and spectrum analyzers.
• Test automation: Perform test automation in Python and/or MATLAB.
• EMC: Apply EMC principles and support EMI testing.
• Full lifecycle: Support from requirements to deployed functionality and maintenance.
• Documentation and mentoring: Maintain docs and mentor junior engineers.

Skills

RF circuit design

RF front ends

RF simulation

Antenna design

RF test & verification

EMC knowledge

PCB/PCB tools

Python/MATLAB

Mentoring

English proficiency

Education

M.Sc. in Electrical Engineering or related field

Tools

Cadence

Siemens

Altium

Keysight ADS

Ansys HFSS

Job description

SiNIX are now looking for a driven and curious Senior RF Design Engineer to join our R&D hardware team located at our headquarters in Gothenburg, Sweden. You will develop advanced RF electronics for complex, high-performance systems where performance and reliability are critical.

For this role, we expect you to take ownership of your work and enjoy solving challenging technical problems together with others. You are comfortable with international collaborations and have proven experience in module and project responsibilities. You need to have a business owner mindset and be able to adapt to many different company organizations.

If you are MacGyver, you have all the qualifications listed below. If you are a mere human like the rest of us and have experience in one or several of the fields and feel that SiNIX is something for you, we’ll provide you with as much duct tape as possible to excel in this role.

Responsibilities

RF Circuit Design:

• Develop robust, high-performance RF circuits on PBA level.

• Design RF front ends, including low-noise amplifiers, mixers, filters and power amplifiers.

• Realize solutions through component selection, schematic design and layout support.

• Design for high reliability in harsh environments, including derating, component selection and long product lifecycles.

RF Simulation and Layout:

• Simulate circuits and passive structures in tools such as Keysight ADS or Ansys HFSS.

• Define stack-ups, transmission lines and transitions for controlled RF performance.

• Translate simulation results into design and layout rules.

Antenna Design:

• Design, simulate and optimize antennas for a range of applications.

• Evaluate antenna performance and drive improvements.

Mixed-Signal and Front-End Integration:

• Design mixed-signal front-end boards combining RF, data converters and clocking with digital processing.

• Ensure coexistence between digital, analog, RF and power sections.

System Architecture and Concept Studies:

• Work closely with system engineers, subsystem engineers and domain specialists, bridging system-level understanding into the RF domain.

• Conduct conceptual investigations and studies addressing future solutions, architectures and design principles.

• Contribute to technical decisions and continuous improvement efforts.

Bring-Up, Testing and Verification:

• Drive board bring-up activities together with stakeholders.

• Characterize RF performance with VNAs, spectrum analyzers and signal generators, and correlate the results with simulations.

• Perform test and verification activities, including test automation in Python and/or MATLAB.

EMC:

• Apply EMC principles in design to meet regulatory requirements, including RF emissions.

• Mitigate electromagnetic interference (EMI) and support EMC testing for product compliance.

Full Product Lifecycle:

• Work across the full lifecycle, from early requirements to deployed and verified functionality.

• Provide production support and product maintenance.

PCB Design Tools:

• Utilize Cadence, Siemens or Altium PCB/PBA design tools for efficient hardware development.

Enjoy Working in a Well-Equipped Lab:

• Thrive in a well-equipped lab environment, conducting experiments and measurements.

Documentation and Mentoring:

• Provide mentorship and guidance to junior RF engineers.

• Maintain documentation for designs, test procedures and validation results.

Qualifications

• M.Sc. in Electrical Engineering, RF Engineering, Engineering Physics or a related field.

• Experience with RF circuit design, including RF front ends, on PBA level.

• Experience with RF simulation tools such as Keysight ADS or Ansys HFSS.

• Experience with antenna design and optimization.

• Experience with RF test and verification using VNAs, spectrum analyzers and signal generators.

• Knowledge of EMC and regulatory requirements for RF emissions.

• Solid experience with PCB/PBA toolsets such as Cadence, Siemens or Altium.

• Strong problem-solving skills and attention to detail.

• Ability to work effectively in a collaborative team environment.

• Fluent in English (written and spoken).

• Meritorious with experience of RF system architecture.

• Meritorious with mixed-signal experience (ADC/DAC) and clocking.

• Meritorious with test automation using Python or MATLAB.

• Meritorious with experience of Cadence PCB/PBA design tools.

• Meritorious with experience of hi-rel electronics design for demanding environments, such as aerospace or space.

• Meritorious with experience of mentoring junior engineers.

Certain roles at SiNIX require security vetting, which means applicable verifications will be done in these recruitments.

Our offer

As a SiNIX family member, you will be part of an international environment where you will learn and share new skills with a diverse team every day and we are not afraid to try out new things!

SiNIX is an equal opportunity employer and welcomes candidates from all backgrounds to apply.