JUST ONE, on behalf of its client, a leading European space and technology company driving cutting-edge satellite systems and aerospace engineering solutions, is looking for a motivated and technically driven OBSW Verification & Validation Engineer to join their growing team in Greece.

The Verification & Validation Engineer contributes to the validation of Satellite Core SoftWare (SCSW). The role focuses on requirements‑based testing, test automation, and verification. This position is ideal for an early‑to‑mid‑career engineer with a strong interest in onboard software, validation processes, and space systems, who is comfortable working in a structured, tool‑driven environment aligned with ESA standards.

Responsibilities

• Create validation test case specifications (VTS) for requirements based on technical specification TS (based on SRS and ICD, see inputs section of this document). 
• Creation of traceability between requirements and test cases. 
• Development and execution of test scripts (XML based) for test cases using the internal tool TSVF (TS-Level Validation Framework) 
• Creation of Software Validation Test Reports (SVR) with the Atlassian Jira/Xray toolchain 
• Processing (creation, verification, and closure) of software problem reports (SPR) 
• Processing (creation, verification, and closure) of software change requests (SCR)
• Fixing of test script issues within own developed test cases or already existing test cases. 

Requirements

• MSc in Aerospace Engineering, Computer Science, Embedded Systems, or a related field
• Strong interest in onboard software and space missions
• Basic understanding of:
• Software development lifecycle
• Verification & validation processes
• Systems engineering concepts (requirements, interfaces, traceability)
• Analytical mindset, attention to detail, and ability to work with complex technical systems
• Familiarity with at least some of the following:
• Test automation or scripting (e.g. XML, Python)
• Version control tools (SVN, Git)
• Jira or similar issue tracking tools
• English (proficient level, required); German is a plus
• Motivation to learn tools, standards, and processes used in ESA and large European space programs
• Military service obligations fulfilled (for male Greek citizens)

Benefits

• Base Salary €35K/yr - €45K/yr depending on level of experience, can be negotiated for senior profiles
• Direct contribution to validation of flight software for a satellite mission
• Hands-on experience with professional V&V toolchains (TSVF, Jira/Xray, CI pipelines) and mentoring by experienced engineers
• Collaborative, high‑trust culture that values initiative, asking questions early, and taking calculated risks. Exposure to an international leading space industry environment through daily interactions with
• Private health insurance, flexible hours, remote work on a case by case basis, training/certification budget, business travel opportunities, and benefit vouchers.
• Opportunities to grow in software V&V, systems engineering, and space project lifecycle activities
• Locations: Athens or Heraklion