System Engineer with expertise in Optical Payloads

OHB Sweden is a leading Swedish supplier of space systems. We develop, build, test and commission satellites and subsystems for a wide range of missions - including communications, Earth observation, and space research and exploration- serving both institutional and commercial customers within and outside Europe. As a Senior Systems Engineer, you will be responsible for defining and justifying the mission's Ground Segment Architecture, leading specification and requirements definition activities while actively contributing to procurement and the management of contractor developments. You will play a pivotal role within the Flight Operations Team by planning, executing, and optimizing satellite operations, maintaining spacecraft health, leading real-time anomaly responses, and guiding a small team of engineers. Consequently, your technical scope will include defining onboard failure detection autonomy, drafting flight procedures and user manuals, and planning and leading ground-based System Validation Tests (SVT). Collaborating closely with internal teams and external partners to deliver robust solutions, this dynamic position demands strong leadership, exceptional communication skills, and the proven ability to thrive in a fast-paced environment. It is desirable that you have a solid technical background in one or more of the following spacecraft engineering areas: * Data handling/Software * Ground Segment * Attitude and orbit control / Orbital mechanics * TT&C Required Qualifications * Bachelor’s or Master’s Degree in Aerospace Engineering, Systems Engineering, or related field * At least 5 years of experience in satellite system or subsystem engineering * Fluent in the English language, both spoken and written * Excellent interpersonal skills and communications capabilities * Strong understanding of TT&C, flight dynamics, and ground segment architecture * Experience with anomaly detection, root cause analysis, and recovery procedures * Legal authorization to work in Sweden Added advantageous qualifications: * Experience with ESA programs and projects or other large international collaborations * Familiarity with scripting or automation tools (e.g., Python, Bash). * Knowledge of CCSDS & ECSS communication protocols * Experience of work in Mission Control during critical phases * Ability to work in a fast-paced environment and manage multiple priorities We’re looking for a proactive team player who learns quickly, provides technical guidance to colleagues, and can also work independently. Strong problem-solving skills, initiative, and a pragmatic approach are essential - focusing on achieving the right balance of quality and timely delivery. If you’re ready to be part of our journey and contribute to complex and exciting projects, we’d love to hear from you!

YOUR (SPACE) MISSION 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.  TASKS & RESPONSIBILITIES In this role you will: * Define and support the avionics and electronics architecture of optical payloads and translate system requirements into robust electronic concepts, interfaces and specifications * Drive procurement activities for electronic subsystems, including supplier selection, technical alignment, quotations and make-or-buy decisions * Act as the technical interface with suppliers and subcontractors, ensuring alignment on design, quality, delivery and performance expectations * Support engineering reviews, including requirements, design, test readiness and manufacturing data assessments * Contribute to system-level integration, verification and test of electronic subsystems across development and production phases * Support risk management activities including obsolescence analysis, component availability and procurement planning  YOUR PROFILE We are looking for candidates with the following qualifications: * A Master’s degree in avionics, aerospace engineering, electronics engineering, electrical engineering or a related field * Experience in avionics or electronics development for aerospace, space, defense or other high-reliability systems * Strong understanding of electronic architectures including power, data handling, control electronics and sensor interfaces * Experience with procurement, supplier management or sourcing of electronic components, boards or subsystems * Ability to write and review technical documentation such as specifications, interface documents and supplier statements of work * A structured, pragmatic and delivery-oriented mindset with strong communication skills across multidisciplinary teams 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 with an annual bonus based on individual and company performance * 27 days of annual leave (based on full-time employment) * 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.