Senior Mixed-signal IC Design Engineer

Are you passionate about designing cutting-edge analog and mixed-signal circuits ? Do you enjoy transforming complex ideas into efficient and reliable silicon ?

If so, this position is for you !

KD is a semiconductor company that provides innovative high-speed optical communication solutions for demanding environments. With more than 50 employees, we are expanding our activity in integrated circuit design and developing a unique semiconductor manufacturing facility in Spain.

As part of this growth, we are looking for a Senior Mixed-Signal IC Design Engineer to join our team and contribute to the development of next-generation optical communication products.

The responsibilities, profile, competencies, conditions, and other details of the position are listed below.

Tasks and responsibilities :

Specification of the analog and mixed signal blocks that are embedded in the system (ADC, DAC, PLL, data interfaces, optoelectronics…).

Design (from schematic to full verification at extracted level) of the analog and mixed-signal blocks in sub-nanometric CMOS processes. It means been involved in the full AMS design flow : system-level design, schematic, layout and full verification.

Definition of layout guidelines for layout engineers and review of their work.

Collaboration with the test engineers for the test definition of the fabricated ICs.

Review and analysis of lab characterization data, for validation and correlation with simulation results.

Cooperation with the rest of the team to define the characterization tests for the circuits in which the analog and mixed-signal blocks are integrated.

Cooperation with the system-level engineers for the generation of models of analog and mixed-signal blocks for their use at system-level evaluation.

Assist on the integration of the complete analog subsystem to be used in complex mixed-signal design within integrated digital logic. This will include mixed-signal verification with the digital processing.

Research on new architectures and efficient solutions for the future products of the company and generation of new patents.

Internal meeting presentation and documentation of the developed work.

Requirements :

MSc or PhD in Electronics, Electrical, or Computer Engineering, or a relevant field, with at least 5 years of experience in similar roles.

Proven experience in delivering successful silicon designs, including product definition, characterization, qualification, and productization.

Proven experience in designing full-custom analog and mixed-signal IP blocks in sub-nanometric CMOS technology (28nm or below), from schematic to full verification, using IC EDA tools such as Cadence or Synopsys.

Strong knowledge of full-custom analog layout techniques, with the ability to manage and review the work of others.

Excellent written and verbal English communication skills.

Dynamic, motivated, and passionate about your work; analytical, organized, and proactive; able to integrate quickly into a young and dynamic team.

Employment Conditions :

Indefinite full-time contract.

24 working days holiday.

Flexible schedule, including intensive hours on Fridays and during the summer months.

Up to 10 hours of telework per week.

Modern and comfortable workplace located in Tres Cantos (Madrid).

What We Offer :

At KD , we believe in combining professional growth with personal well-being.

Development and Growth : We provide continuous learning and training opportunities in a fast-growing start-up environment, with a clear focus on innovation and professional development.

Financial Stability : Competitive salary to be negotiated based on each candidate’s experience and profile.

Health and Well-being : Free medical insurance for employees and discounted coverage for family members.

Language and Learning : Free English and Spanish classes to support your communication and growth.

Work-Life Balance : A core part of our culture. We value flexibility and believe it is essential for maintaining motivation, well-being, and long-term professional growth.

Company Culture : A dynamic, collaborative, and international work environment with flat hierarchies and open communication.

Team Spirit : We are a friendly and motivated team passionate about technology and driven by ambitious, innovative projects. We value personal connections and regularly organize social events and networking activities.

Perks and Extras : Enjoy the Ticket Restaurant program, engaging company social events, and a comprehensive training program to support your career growth.

Join us and be part of a talented, international team driven by innovation and teamwork.

At KD, you’ll find an inspiring environment where your ideas matter, your growth is supported, and your work makes a real impact on the future of optical networking.