RF Engineer

Stark

Berlin permanent

Posted: November 10, 2025

Job Description

About Us:
STARK is a defence technology company redefining how autonomous and electronic warfare systems are deployed across modern battlefields. We design, develop, and manufacture high-performance unmanned and EW systems that are software-defined, mass-scalable, and operationally decisive. Our mission is to strengthen the technological edge of European and NATO forces through responsible innovation and uncompromising engineering excellence.

Your mission:
You will design and deliver high-performance hardware for next-generation electronic warfare systems that operate in the most demanding and contested environments.

Responsibilities:
• RF Chain Architecture: Design and implement high-performance RF up and down converter chains (superheterodyne, direct conversion) connecting the digital domain (ADC/DAC) to the antenna.

• Front-End Design: Develop robust RF Front-Ends (RFE), including Low Noise Amplifiers (LNA), Power Amplifiers (PA), mixers, filters, and local oscillators.

• Antenna Engineering: Simulate, design, and validate custom antenna elements and arrays optimized for size, weight, and power (SWaP) constraints on unmanned platforms.

• System Design: Conduct installed performance analysis (CST/HFSS) to optimize antenna placement, accounting for platform shadowing and coupling effects.

• PCB & Layout: Execute precision RF PCB layout (impedance control, layer stack-up management, signal integrity) using Altium Designer.

• Link Budgeting: Perform detailed system-level analysis, including cascade analysis (Gain, NF, IP3) and link budget calculations to define component specifications.

Qualifications:
• RF Architecture: Deep understanding of transceiver architectures (Superhet, Zero-IF) and signal conditioning.

• Simulation Tools: Proficiency with electromagnetic simulation software (e.g., CST Studio Suite, HFSS, FEKO) and circuit simulation tools (e.g., Keysight ADS, AWR Microwave Office).

• Component Selection: Experience selecting discrete RF components (filters, couplers, circulators, switches) and designing matching networks.

• Layout Expertise: Proven expertise in RF PCB design layout techniques, preferably in Altium Designer, including mitigation of parasitic effects.

• Measurement: Hands-on proficiency with RF measurement techniques (S-parameters, Noise Figure, P1dB, IP3, etc.).

• Mindset: Ability to work with precision, discipline, and a strong security mindset suited for defense applications.

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