• Define and specify control and sequencing algorithms for PLL and clocking architectures targeting FR1 and FR2.
• Decompose 3GPP and system-level PLL requirements into detailed specifications for individual PLL building blocks.
• Define hardware/firmware algorithms with a focus on area- and timing-optimized implementations.
• Implement and simulate algorithms in MATLAB and C++.
• Develop innovative concepts to improve and optimize PLL control and sequencing behaviour.
• Author detailed specifications as input to design and firmware teams.
• Perform root-cause analysis and debug issues identified during verification. Support cross-functional teams in resolving defects.

• Experience defining control sequences for digital and analog blocks within transceiver architectures
• Strong analytical and problem-solving skills
• Deep understanding of RF transceiver architecture, with specific expertise in frequency synthesis (PLLs, DCOs) and key metrics such as phase noise and lock time
• Extensive hands-on experience specifying and simulating phase-locked loop (PLL) and clocking architectures

• Solid knowledge of cellular radio standards at the physical layer (GSM, UMTS, LTE, 5G NR) and their implications for RF/PLL specifications
• Excellent written and verbal communication skills for effective cross-functional collaboration
• Experience using AI tools — such as LLMs, AI-assisted coding environments, and simulation co-pilots — to accelerate design exploration, automate repetitive analysis tasks, and improve engineering productivity
• Master's or PhD in Electrical Engineering (or equivalent) with 3+ years of relevant experience in RF/mixed-signal architectures
• The minimum salary pursuant to the CBA amounts to EUR 81,580 gross per year for full-time employment. Actual salaries are oriented at current market salaries and take your qualifications and experience into account.
• Apple is an Equal Opportunity Employer that is committed to inclusion and diversity. We take affirmative action to ensure equal opportunity for all applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or other legally protected characteristics. If you’d like more information about your EEO rights as an applicant. Apple will not discriminate or retaliate against applicants who inquire about, disclose, or discuss their compensation or that of other applicants.

At Apple, we’re not all the same. And that’s our greatest strength. We draw on the differences in who we are, what we’ve experienced, and how we think. Because to create products that serve everyone, we believe in including everyone. Therefore, we are committed to treating all applicants fairly and equally. We will work with applicants to make any reasonable accommodations.