
cosine · Sassenheim, The Netherlands
YOUR (SPACE) MISSION As the Avionics / Electronics Engineer at cosine you play a key role in shaping the electronic backbone of high-performance optical payloa...
As the Avionics / Electronics Engineer at cosine you play a key role in shaping the electronic backbone of high-performance
optical payloads that operate at the frontier of space. You help define and realise robust avionics architectures that enable
Earth observation, environmental monitoring, defence-related remote sensing and planetary science missions. From concept to
procurement and integration, your work ensures that every electronic subsystem performs reliably in the most demanding space
environments. You translate complex system needs into practical, buildable and procurable solutions that directly contribute to
mission success and high-impact decision-making from orbit.
electronic concepts, interfaces and specifications
make-or-buy decisions
performance expectations
We are looking for candidates with the following qualifications:
At cosine, we highly value our employees, and we will support your professional and personal development. We also provide our
Founded in 1998, cosine is a world-leading developer of space instrumentation and measurement systems, making the invisible
measurable and the complex actionable.
Its expertise spans High-Energy Optics, including optics developed for ESA's future NewAthena X-ray observatory, as well as remote
sensing solutions for Earth Observation and planetary science.
With over 25 years of experience and advanced cleanroom and assembly facilities across the Netherlands, Germany, and Italy, cosine
brings deep scientific and engineering expertise to some of the most demanding missions in space and on Earth.
What makes cosine a unique place to work is that your work goes end-to-end: from concept and design to building, testing, and
delivering hardware that actually flies in space. You work in small, highly skilled teams where you have real ownership and
impact, alongside experts in optics, physics, nanofabrication, and systems engineering.
cosine is committed to providing an inclusive and equal opportunities work environment where everyone can thrive. As a proud
member of the Women in Aerospace community, we recognise the importance of diversity, inclusion, and equal opportunity in the
workplace.
YOUR (SPACE) MISSION As a Scientist or Mechanical Engineer at cosine, you will contribute to cutting-edge technologies that enable space exploration, Earth observation, and advanced scientific research. Whether your expertise lies in physics, mechanics, electronics, optics, thermal engineering, or systems development, you will work alongside multidisciplinary teams to solve complex technical challenges and transform innovative ideas into real-world instruments and systems. At cosine, we combine scientific excellence with hands-on engineering. Our teams develop high-performance technologies for international space missions, scientific facilities, and industrial applications. Depending on your background and interests, you will be working on projects that range from concept development and modelling to testing, integration, and validation. We are always interested in meeting talented MSc and PhD graduates who are eager to push technological boundaries and make a tangible impact on the future of science and space exploration. Potential opportunities include: * Scientist Engineer Thermo-Mechanical Develop and analyse thermal and mechanical solutions for high-performance instruments operating in challenging environments. You will contribute to the design, modelling, testing, and qualification of systems that must perform reliably in space and other demanding applications. * Scientist Engineer Electronics / Avionics Design, develop, and validate electronic subsystems that form the backbone of advanced space instrumentation. Your work may involve embedded electronics, avionics architectures, hardware verification, and system integration, contributing directly to mission-critical technologies. * Scientist Engineer Silicon Pore Optics Support the development of next-generation X-ray optics based on Silicon Pore Optics technology. You will design and execute experiments, analyse measurement data, work with precision assembly processes, and contribute to technologies that enable future space telescopes and advanced scientific instrumentation. * Mechanical Engineer Translate complex technical requirements into innovative mechanical designs and practical engineering solutions. You will work across the full development cycle, from concept generation and detailed design to manufacturing support, testing, and customer-facing project activities. YOUR PROFILE We are looking for candidates with the following qualifications: * MSc or PhD degree in Physics, Mechanical Engineering, Aerospace Engineering, Electrical Engineering, Applied Physics, or a related technical discipline * Strong analytical and problem-solving skills combined with a hands-on engineering mindset * Affinity with complex multidisciplinary systems and technology development * Experience through academic research projects, industrial R&D, or relevant engineering activities * Ability to communicate effectively in English within an international environment * Curiosity, initiative, and motivation to contribute to innovative technologies for space and science * Residing within commuting distance of Sassenheim, the Netherlands, or willing to relocate WHAT WE OFFER At cosine, we highly value our employees, and we will support your professional and personal development. We also provide our employees with: * A unique, international working environment at the intersection of physics and engineering * The opportunity to deliver end-to-end solutions in autonomous project teams, in close collaboration with customers * A competitive salary based on the extend of relevant experience and seniority of the position * 27 days of annual leave (based on full-time employment) * Annual bonus based on personal and company performance * Hybrid working options, including the possibility to work partially from home * Company bicycle and fitness plans * A personal development budget * Initial one-year contract, with the aim of long-term collaboration ABOUT COSINE Founded in 1998, cosine is a world-leading developer of space instrumentation and measurement systems, making the invisible measurable and the complex actionable. Its expertise spans High-Energy Optics, including optics developed for ESA's future NewAthena X-ray observatory, as well as remote sensing solutions for Earth Observation and planetary science. With over 25 years of experience and advanced cleanroom and assembly facilities across the Netherlands, Germany, and Italy, cosine brings deep scientific and engineering expertise to some of the most demanding missions in space and on Earth. What makes cosine a unique place to work is that your work goes end-to-end: from concept and design to building, testing, and delivering hardware that actually flies in space. You work in small, highly skilled teams where you have real ownership and impact, alongside experts in optics, physics, nanofabrication, and systems engineering. cosine is committed to providing an inclusive and equal opportunities work environment where everyone can thrive. As a proud member of the Women in Aerospace community, we recognise the importance of diversity, inclusion, and equal opportunity in the workplace.
ROLE AND RESPONSIBILITY * Improvement and development of the drone avionics, including electrical wiring, sensors, avionics box, battery and power management * Creating technical drawings, wiring diagrams, specifications, configurations, settings * Testing of components and sub-systems, focus electrical components and systems * Support testing of the complete drone system * Root cause problem solving * Technical documentation * Electrical assembly of components and systems for testing * Managing avionics component and avionics system suppliers * Taking over system design responsibility * Improving SwissDrones processes and procedures YOUR PROFILE * Solid technical education, e.g. apprenticeship as aircraft electronic technician (Lehre als Elektroniker/in , Lehre als Luftfahrzeugelektroniker) or equivalent * Higher education optional, e.g. in electrical engineering, avionics engineering, systems engineering (Höhere Fachschule als Techniker in Elektrotechnik /Avionik oder Fachhochschule in Elektronik/Avionik oder Fachhochschule in Systemtechnik) or equivalent * 3+ years relevant working experience in the avionics and electronics field * Experience in one of the major CAD programs for electronics * Experience in electrical design, manufacturing, assembly and testing * Experience of working in a high quality and safety requirements environment, e.g., aviation, automotive, pharmaceuticals, medical devices or similar * Experience in software integration, configuration, programming or software development skills are a plus * High degree of flexibility and working in a dynamic and growing company * Willingness to solve problems * Willingness to improve company procedures and processes * Team player * Fluent in English - written and spoken * Experience with M365 (Sharepoint, Outlook, Teams) * A strong can-do/will-do attitude NICE-TO-HAVES * Having worked under EASA Part 66 B2 License * Experience with Jira, Confluence * German: B2 - Upper Intermediate language WHAT'S IN FOR YOU * An emerging game-changer in uncrewed aviation * To be part of a high-tech company that is at the forefront of advancing drone technology and innovation * A team of over 50 people from (currently) 12 nations and cultures with great team events * A dynamic, motivated, hands-on and international working environment * Transparent communication at eye level and open feedback culture with short communication lines * Flexible working models with 20% mobile office option * Unlimited space for entrepreneurial thinking and participation * Office space and production facilities with good connections to public transport * Well-known and international customers, suppliers and partners * Steep learning curves and trusting mentorship * 360° insight and 100% involvement in the processes and development steps of our drones * 25 paid vacation days per year
Mission Brief Join the Avionics Department at Isar, within the Electrical Engineering Team responsible for high‑reliability hardware design of PCBAs and Avionics Units that are the backbone of our Spectrum Launch Vehicle. As an Avionics Engineer, you will provide direct contribution to our technology stack and take responsibility for critical Avionics units: driving them through their entire lifecycle from early concept to detailed design, qualification, and all the way to successful on-orbit operations in Space. The ideal candidate is someone with deep technical expertise in Electrical and Electronics engineering who thrives in a fast-moving environment. Preference will be given to those with the ability to make sound technical decisions, able to raise the bar for engineering quality, and the ability to provide technical mentorship to other Engineers along the way. Your Role in Our Space Mission: * Take on ownership of at least one high-reliability Avionics Unit or PCBA * Own all interfaces of your product across its lifecycle, from design to manufacturing to verification and integration, including all technical and programmatic interfaces * Carry out the full Electrical design cycle for PCBAs including component selection, schematic capture, layout and design verification * Take on Unit level tasks for your products including requirement management, design, reliability analyses, qualification & acceptance testing, as well as troubleshooting analysis * Conduct design reviews for your products and participate in system level design reviews * Plan, execute, and evaluate verification, acceptance, and qualification tests at unit, subsystem, and vehicle level * Develop test procedures and automated scripts for verifying unit functional and electrical performance under harsh operating conditions, such as thermal, vacuum, and vibration * Capture interface requirements and design specifications for test equipment used in test campaigns of your products * Actively participate in Integrated Testing & Flight Data reviews * Collaborate on ad-hoc tasks related to Avionics PCBAs, Units and, Systems with your peers in the Avionics department Qualification Checklist * BSc/MSc in Electrical Engineering, Energy Science and Technology or comparable * 3+ years of working experience with complex PCBs and electronics * Extensive Experience with complex electronics and circuit theory for embedded, power electronics, analog interfaces, and logic * Experience in E-CAD tools (Schematic & Layout Design), preferably Altium Designer * Experience in simulation tools such as PSpice, LTspice, Altium Simulation, or Simulink * Experience in hands-on testing and verification of design functionality and performance * Experience with international or external product standards, regulations, or requirements, such as ISO/ANSI/AEC/MIL or similar * Experience with core product analyses and tools such as Failure Modes and Effects Analyses, Reliability (MTBF), Fault Tree, Ishikawa (Fish-Bone), or similar * Experience in Design for Test and Design for Manufacture concepts * Experience with Electrical Test and Measurement equipment * Hands-On mentality, can-do attitude * Fluent in spoken and written English Bonus Skills: * Previous product ownership * Working experience within a high-reliability industry, such as Aerospace, Medical, or Automotive * Experience in interacting with external certification or regulatory agencies for product compliance * Experience in programming languages such as Python or Matlab for task automation and data analysis * Experience in mechanical design tools such as Solidworks, NX, OnShape, or similar Benefits * Employee Participation Program: Share in our success through our virtual company share program * 30 days of vacation: Enjoy the days off to relax and recharge * Company pension plan: Secure your future with our company pension plan, featuring a 20% employer contribution after the probation period * Subsidised lunch: Stay energised with delicious, subsidised lunches every day * Public transport ticket: Commute with ease using a fully financed Deutschlandticket * Sport Clubs membership: Stay fit with our sponsored sports club memberships (EGYM Wellpass) * Individual learning allowance: Grow your skills with an individual learning budget granted after the probation period * Childcare allowance: Receive a childcare allowance for your non-school-age children * And Much More! Discover additional perks and benefits when you join our team Who we are We are Isar Aerospace and we are at the forefront of New Space building a modern space business to enable faster, better and cheaper access to space. Our mission is to help democratise space and use it for good in order to improve life on Earth now and for the future generations. We are a fast-growing company aiming to provide sustainable and environmentally friendly launch solutions for small and medium-sized satellites and constellations into Low Earth Orbit. The company is privately funded by world-leading technology investors with strong commitment and support and our team is made of driven and talented people with a real passion for space innovation. We're making rockets in a way that hasn't been done before disrupting a traditional industry. If you are up for the challenge, want to work on cutting-edge projects and be part of a team changing the world for better, come, join us and launch your career! Want to find out more about us? Visit www.isaraerospace.com Data Protection We process your personal data for the purpose of managing the recruitment process and assessing your application. For detailed information on how your data is processed, including your rights, please refer to our Privacy Policy. Disclaimer Isar Aerospace SE is an equal-opportunity employer committed to fairness and inclusivity. We do not prioritize any specific religion, gender, nationality, or background. Due to security clearance requirements, affiliations with countries listed under § 13 para. 1 no. 17 SÜG may affect the application process. All qualified applicants are encouraged to apply. We use Metaview to record interview audio so our team can review it later and stay focused during the conversation. We will record interviews only if you opt in. Please note that we will request your consent separately during the interview process. 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