# Senior RF / Analog Design Engineer (m/f/d) at Q Ant Gmbh

- Company: Q Ant Gmbh (qant.com)
- Location: Stuttgart, Austin
- Places: Stuttgart, United States
- Posted: 2026-05-15
- Apply: https://q-ant-gmbh.jobs.personio.de/job/2635736
- Page: https://ye.saranatour.dev/jobs/senior-rf-analog-design-engineer-m-f-d-q-ant-gmbh-kn753g4j2f288rtqvzgr3w2snx8heh23

## The posting

Senior RF / Analog Design Engineer (m/f/d)
Q Ant Gmbh · Stuttgart, Austin

The future of AI computing is light, not electrons. Q.ANT is building photonic processing systems that compute with light – delivering a scalable, energy-efficient alternative to transistor-based architectures for next-generation AI and HPC applications.

As **Senior GHz Analog & Mixed-Signal Engineer (m/f/d)**, you are the architect of the high-speed electronic signal paths in the **GHz-range** that make photonic computing real. You will design, simulate, and validate circuits that interface directly with cutting-edge silicon photonic devices, custom ASICs, and advanced 2.5D/3D interposer platforms. Working at the intersection of **RF electronics, electro-optics, and semiconductor heterogeneous integration**, you will turn individual high-performance components into unified, scalable subsystems.

**Your Responsibilities**

- **High-Speed Analog & Mixed-Signal Design:** Specify, design, and simulate GHz-band circuits including TIAs, ADC/DAC front-ends, amplifiers, and PLLs – optimizing for noise, linearity, jitter, bandwidth, and power efficiency using tools such as SPICE, SpectreRF, and ADS.
- **Electronic-Photonic Co-Design:** Define and optimize electrical-optical impedance matching, biasing, and signal conditioning for silicon photonic components including modulators, photodetectors, and waveguide interfaces.
- **Interposer & Advanced Packaging Integration:** Develop and validate 2.5D/3D integration architectures using interposers and chiplets; co-simulate RF parasitics, TSV routing, and thermal behavior to ensure signal integrity across heterogeneous boundaries.
- **ASIC Collaboration:** Partner with ASIC designers to define high-speed interface requirements and support SerDes, CDR, and mixed-signal block integration.
- **Lab Bring-Up & Validation:** Lead hands-on characterization of electro-optic bandwidth, eye diagrams, jitter, noise spectra, and system-level behavior using oscilloscopes, VNAs, BERTs, and spectrum analyzers.
- **Innovation & IP Contribution:** Propose novel analog architectures and co-integration strategies that push beyond conventional design limits, contributing to Q.ANT's IP portfolio and next-generation photonic processor roadmap.

- **Educational Foundation:** M.S. or Ph.D. in Electrical Engineering, Physics, Microsystems Engineering, or a related technical field.
- **Industry Expertise:** 5+ years designing analog/mixed-signal circuits in the 1–20 GHz range, with strong command of SPICE/Spectre, ADS, HFSS, and S-parameter/EM co-simulation.
- **Electro-Optic Experience:** Hands-on background integrating electronics with silicon photonic or optoelectronic components – modulators, photodiodes, optical packaging – is a strong advantage.
- **Packaging & SI/PI Know-How:** Demonstrated experience with high-speed PCB design, signal and power integrity analysis, and advanced packaging concepts (CoWoS, EMIB, or similar).
- **Analytical Toolset:** Familiarity with Python or MATLAB for measurement automation and data analysis; experience defining test SOPs for reproducibility.
- **Language:** Fluent English required; German or another European language is a plus.

- We hire for attitude and train for skills.
- We encourage self responsibility and accelerate professional development.
- We move fast and encourage experimentation.
- You have the opportunity to be part of developing breakthrough photonic computing technology and have a lasting impac