Cellular RF Transmitter Systems Engineer

Linz, Upper Austria, Austria

At Apple, we work every single day to craft products that enrich people’s lives. The people here at Apple don’t just create products — they create the kind of wonder that revolutionizes entire industries. We invite you to join our dynamic group, for the unique and rewarding opportunity to contribute to upcoming products that will delight and inspire millions of Apple’s customers every day. Are you interested in doing work that challenges you, expands your thinking, provides innovative solutions for future problems while driving your growth as recognized technical leader in the cellular industry? Apple's RF Transmitter Systems Engineering team is looking for a passionate, talented individual who is eager to break technical boundaries and to change the way of doing things. Our elite team is shaping the mobile market with disruptive RF innovations while taking full responsibility for execution and commitments to schedule and quality. Join our team of leading experts in cellular RF industry and deliver differentiating transmit architectures and solutions for Apple’s wireless products that create amazing value for our customers!

In this role, you will be part of an industry-leading RF Transmitter Systems Engineering team. You will work closely with other architecture- and systems engineering teams, RF design teams and SW teams to assess, specify and drive transmitter concepts with focus on leading-edge performance and uncompromised quality as baseline for differentiating products.

Your daily work includes the following tasks:
Translate system-level and performance requirements into requirements for the TX line-up and TX features, including RF algorithm specifications for RFICs and system firmware.
Understand and specify RF algorithms (e.g. power control, calibration) and define the RF control infrastructure, including compute resources, interfaces, memory and timing constraints.
Research, design, and prototype machine learning models—including neural networks and reinforcement learning—for RF transmitter applications such as power control, calibration, and digital pre-distortion.
Develop and maintain simulation environments in Python or MATLAB to model RF systems and test AI algorithms.
Analyze simulation data to evaluate model performance, identify trade-offs, and propose improvements.

Proven years of relevant experience in RF, including cellular transmit architectures, or PhD degree with previous work on cellular topics.
Knowledge of cellular radio/3GPP standards (GSM, UMTS, LTE, LTE-A, 5G NR), including RF aspects as well as system use cases and TX waveforms.
Familiarity with RF systems and transceiver architecture, including lineup design and component-level trade-offs (e.g. gain, linearity, noise, power, thermal).
Solid theoretical grounding and hands-on experience with classical machine learning techniques (e.g., clustering, dimensionality reduction) applied to regression and classification problems.
Solid theoretical understanding and hands-on experience with neural networks for regression and classification problems.
Practical experience across supervised, unsupervised, and reinforcement learning.
Strong analytical skills and the ability to collaborate and communicate across multicultural, global teams.
BSEE or MSEE
Proficiency in English.

Initial expertise in transmitter system-level concepts and control procedures like power control, digital predistortion, envelope tracking.
Background in digital signal processing.
Understanding of SoC integration constraints and multi-chip RF architectures.
Ph.D. in Electrical Engineering or equivalent.
The minimum salary pursuant to the applicable collective bargaining agreement amounts to €62,610 gross per year for full-time employment. Actual salaries are oriented at current market salaries and take your qualifications and experience into account.

At Apple, base pay is one part of our total compensation package and is determined within a range. This range provides the opportunity to progress as you grow and develop within a role. The base pay for this role is between €63,900 and €120,000 and reflects a full-time equivalent. Your base pay will depend on contractual hours, skills, qualifications, experience, location, and any relevant collective bargaining agreement provisions.

Apple employees are eligible to participate in the Apple Inc. discretionary stock programs. Additionally, this role might be eligible for discretionary bonuses or commission payments as well as relocation. You'll also receive benefits including: Comprehensive insurance benefits, retirement benefits, a range of discounted products and for formal education related to advancing your career at Apple, reimbursement for certain educational expenses — including tuition. Learn more about Apple Benefits

Note: Apple benefit, compensation and discretionary stock programs are subject to eligibility requirements and other terms of the applicable plan or program.

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.

At Apple, we believe accessibility is a fundamental human right. You’ll find that idea reflected in everything here — in our culture, our benefits and our digital tools. By welcoming as many perspectives as possible, we help you build a career where you feel like you belong.

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