Senior Firmware Engineer – VHDL / FPGA

Tecnobit-Grupo Oesía; Rivas-Vaciamadrid; On-site; EUR 55,000 - 75,000; Full time

Job summary

Grupo Oesía seeks a Senior Firmware Engineer with strong VHDL and FPGA experience in Madrid to design and verify complex FPGA‑based avionics systems. You will work on synthesis, IP cores, AXI interfaces and embedded protocols, with Xilinx toolchains and DOORS for requirements tracing.

Strong English in an international environment is valued. You will collaborate with multidisciplinary teams on defence and avionics projects, contributing to high‑reliability firmware while supporting integration

Qualifications

• Degree in Telecommunications Engineering, Electronics, Industrial Engineering or Computer Engineering.
• Minimum 4 years of FPGA/firmware experience.
• Experience with synthesizable VHDL and Xilinx FPGAs (Zynq/UltraScale).
• Proficiency with Vivado, ModelSim, AXI buses and embedded interfaces.
• Knowledge of DOORS and requirements‑based development is valued.

Responsibilities

• Design and develop synthesizable VHDL for FPGA‑based systems.
• Work with Xilinx Zynq/UltraScale FPGAs in Vivado and verify with ModelSim.
• Design/ integrate IP cores, AXI buses and communication interfaces (UART/SPI/I2C).
• Perform FPGA debugging with ChipScope and XSCT scripts; develop XSCT apps.
• Support system integration, verification and multidisciplinary teams.

Skills

VHDL

FPGA

Xilinx Vivado

ModelSim

AXI buses

UART

SPI

I2C

Xilinx Zynq

Xilinx UltraScale

XSCT

Xilinx SDK

DOORS

Education

Engineering degree in Telecommunications/Electronics/Industrial/Computer

Job description

Senior Firmware Engineer – VHDL / FPGA | Defence & Avionics (Global Opportunity) – Grupo Oesía

Our projects become technology that protects, connects and drives strategic sectors: our own. At Grupo Oesía, we work to ensure innovation delivers real impact, and we are looking for people who want to be part of that challenge.

WHAT WILL YOUR MISSION BE?

At Tecnobit, part of Grupo Oesía, we are looking for a Senior Firmware Engineer with strong VHDL and FPGA experience to join our Avionics & Communications team in Madrid.

We are looking for an experienced engineer with a solid background in firmware development, synthesizable VHDL and FPGA-based systems, who would like to contribute to advanced technology projects in the defence and avionics sector.

WHAT WILL YOU DO IN YOUR DAY-TO-DAY ROLE?

• Design and develop advanced synthesizable VHDL for FPGA-based systems.
• Develop and verify solutions based on Xilinx Zynq and UltraScale FPGAs, using Vivado.
• Perform functional verification using VHDL testbenches and ModelSim, as well as FPGA debugging and integrated logic analysis.
• Design and integrate Xilinx IP cores, custom cores and AXI buses.
• Implement and control communication interfaces such as UART, SPI and I2C.
• Use ChipScope for embedded logic analysis and FPGA debugging.
• Develop XSCT scripts and stand‑alone applications using Xilinx SDK.
• Manage and trace system requirements using DOORS, ensuring their verification through testing.
• Support system integration, testing and verification alongside multidisciplinary engineering teams.

WHAT ARE WE LOOKING FOR?

• Degree in Telecommunications Engineering, Electronics, Industrial Engineering, Computer Engineering, or another relevant engineering discipline.
• Minimum of 4 years of professional experience in FPGA or firmware development.
• Strong professional experience developing synthesizable VHDL.
• Hands‑on experience with Xilinx FPGAs, particularly Zynq and UltraScale.
• Professional experience using the Xilinx Vivado design environment.
• Experience in FPGA simulation, verification and debugging.
• Experience with ModelSim, AXI buses and embedded communication interfaces will be highly valued.
• Knowledge of DOORS and requirements‑based development will be highly valued.
• Ability to work comfortably in English within an international engineering environment.

What will you find at Grupo Oesía?

• Projects with real technological impact.
• Teams where sharing knowledge is part of everyday work.
• Continuous professional development tailored to each profile and individual.
• An environment where engineering and people grow together.

If you are motivated by tackling new technological challenges and being part of projects that leave a lasting impact, we would be delighted to meet you.

About Grupo Oesía

Build your career where technology has a purpose. At Grupo Oesía, we develop dual‑use digital and industrial engineering projects in strategic sectors, strengthening key capabilities for Spain and Europe through our technology centres and alongside a team of more than 3,800 professionals across Spain, Brussels, Latin America and Asia.

At Tecnobit-Grupo Oesía we design, develop, manufacture and maintain technology that is already in operation: intelligent imaging systems, secure tactical communications and simulation centres. A clear example of how the technology we create here delivers real‑world impact.

We operate from our technology centres across Castilla-La Mancha, Andalusia, Galicia, Valencia and Madrid: innovation hubs that contribute key capabilities to national sovereignty and Europe’s strategic autonomy.

But what truly sets us apart are the people who make each of those projects possible.

We want you to develop your full potential. That is why we build professional environments based on equal opportunities, inclusion and the recognition of every individual’s talent.

We foster an environment where talent can learn, collaborate and continue growing, contributing new ideas and reaching its full potential. Because innovation thrives when different perspectives work towards a shared purpose.

If you are looking for a place to grow your career, take on new challenges and be part of impactful projects, we would love to meet you.

Engineering the Future, Together.