Modem Engineer

SpaceSpecialists Ltd; Noordwijk; On-site; EUR 60,000 - 90,000; Full time

Benefits offered by this job

Good primary and secondary terms ofem

Job summary

Celestia Satellite Test & Simulation BV (C-STS) in Noordwijk, The Netherlands, is seeking a Modem Engineer to design and develop RF and optical modems for satellite links, involving modulation, demodulation and signal processing.

You will define modem system architectures, work with DSP algorithms, and collaborate with system engineers, FPGA/VHDL specialists and software designers to deliver our ground station solutions and support TT&C products.

Qualifications

• Degree in Electrical, Computer Engineering or a related field.
• Experience in signal processing and digital modulation schemes (e.g., GMSK, OQPSK, QPSK).
• Proficiency with C, C++, MATLAB, Simulink, and HW/SW platform prototyping.
• Knowledge of FEC techniques (trellis, convolutional codes, BCH codes, LDPC, turbo codes).
• Familiarity with FPGA (Xilinx) and VHDL design.
• Experience in packaging and continuous improvement of engineering software.
• Excellent problem‑solving skills and ability to work collaboratively in a high‑tech, dynamic environment.

Responsibilities

• Defining modem system architectures and DSP algorithms across the product lifecycle.
• Hands‑on development and support in collaboration with engineers and customers.
• Gathering system requirements and issuing specifications.
• Interacting with system engineers, FPGA/VHDL specialists, and SW designers.
• Organising firmware outsourcing for modem and FEC solutions.
• Supporting TT&C and high‑rate legacy products.
• Verifying and validating lab benches and procedures.
• Preparing formal documentation for project activities.
• Contributing to proposals for innovative satellite communications technologies.
• Analyzing, modelling, and simulating DSP algorithms.

Skills

Signal processing

Digital modulation schemes

C/C++ programming

MATLAB/Simulink experience

FEC techniques knowledge

FPGA (Xilinx) knowledge

Problem solving & collaboration

Education

Degree in Electrical or Computer Engineering

Tools

C

C++

MATLAB

Simulink

VHDL

Xilinx FPGA

Job description

Location: Noordwijk, The Netherlands, Europe

Type: Permanent

Start Date: Immediate

Celestia Satellite Test & Simulation BV (C-STS) is a company dedicated to continuous innovation in spacecraft communications, providing technology products, systems and services to the space, defence, telecoms and satellite markets. The company focuses on RF engineering, ground station systems, payload simulation and testing, and IoT solutions, offering a fully integrated ground station installation approach.

Modem Engineer – The role is based in Noordwijk, The Netherlands and involves cutting‑edge engineering of RF and optical modems used for modulation, demodulation, and signal processing of satellite communication links.

Core Activities

• EGSE – Electrical Ground Support Equipment used to simulate and test satellite subsystem interfaces
• TT&C – Telemetry, Tracking & Command equipment used to communicate with satellites in space
• Optical Digital Converters – subsystem of optical ground stations enabling data retrieval from satellites via laser communication

Responsibilities

The role includes involvement in defining modem system architectures, DSP algorithms, and system operations from initial design through to finished products, with hands‑on development and support in collaboration with C-STS engineers and customers.

• Gathering system requirements and issuing specifications
• Resolving system design trade‑offs
• Interacting with system engineers, VHDL/FPGA specialists, and SW designers
• Organising and handling firmware outsourcing for modem and FEC solutions
• Supporting TT&C and high‑rate legacy products
• Supporting verification and validation lab benches and procedures
• Preparing formal documentation for project or product‑oriented activities
• Contributing to proposals for innovative satellite communications technologies
• Analyzing, modelling, and simulating DSP algorithms

Qualifications, Skills & Experience

• Degree in Electrical, Computer Engineering or a related field
• Experience in signal processing and digital modulation schemes (e.g., GMSK, OQPSK, QPSK)
• Proficiency with C, C++, MATLAB, Simulink, and HW/SW platform prototyping
• Knowledge of FEC techniques (trellis, convolutional codes, BCH codes, LDPC, turbo codes)
• Familiarity with FPGA (Xilinx) and VHDL design
• Experience in packaging and continuous improvement of engineering software
• Excellent problem‑solving skills and ability to work collaboratively in a high‑tech, dynamic environment

Benefits

• Good primary and secondary terms of employment
• Generous annual leave
• Flexible working hours
• Office location easily accessible by car or public transport

Celestia is an equal opportunity employer committed to creating an inclusive and welcoming work environment where everyone can be happy, productive, and reach their individual potential.

For further information about this position, please contact us and we will endeavour to get back to you as soon as possible.