The Optical System Engineer is responsible for the development, validation, and system-level integration of optical payloads within satellite systems across the full lifecycle from proposal phase to launch. This is an onsite position, located in Brno, Czech Republic. The position is offered as a fixed-term contract for 3 years, with the possibility of extension. We are primarily considering candidates based in the EU or with existing eligibility to work in the EU. The role includes developing and validating requirements for optical payloads based on analysis, testing, customer requirements and allocated budgets. This also involves analysing system requirements, extracting subsystem-relevant requirements, and defining, generating and maintaining specifications. At system level, the role focuses on: • interface definition and control • functional analyses and simulations • trade-offs and technical budgeting • validation and verification strategy across the project lifecycle You will contribute to the development and design of satellite systems and subsystems, working closely with subject matter experts on architecture definition, system and component engineering, trade-off studies and system modelling. This includes planning system development and coordinating engineering activities within the project team. The role also supports manufacturing, assembly and testing by providing optical engineering expertise and actively participating in: • procurement • assembly • testing processes You will collaborate closely across disciplines (mechanical, thermal, electrical, software) and support coordination and supervision of subcontractors for development, manufacturing and integration activities. The position is also involved in proposals and customer interaction, including: • proposal preparation and evaluation • ESA ITTs and other tenders • technical discussions (RFQ, RFP, RFI) • participation in system and subsystem reviews (e.g. ESA) Additional responsibilities include creating and maintaining technical documentation (design, drawings, requirements, performance), presenting results internally and externally, and contributing to knowledge sharing, mentoring and training. The role supports space projects from early proposal phase through launch and contributes to the development of new technologies. Additional responsibilities include creating and maintaining technical documentation, presenting results internally and externally, and contributing to knowledge sharing, mentoring, and training. The role supports projects from proposal phase through launch and contributes to new technology development.