Senior System Engineer

Location: Athens, Attica, Greece

Workplace: hybrid

Employment Type: full

Description

JUST ONE, on behalf of its client, a leading software development and systems integration company operating within the defense industry is looking for a Senior Systems Engineer.

As a Senior Systems Engineer, you will lead and contribute to the design, integration, and lifecycle management of complex systems and systems-of-systems. You will translate stakeholder needs into validated system requirements and architectures, maintain traceability across the system lifecycle, and support integration and acceptance from a systems engineering perspective. You will also mentor engineers and promote best practices across the team.

• Analyze stakeholder needs and operational concepts to define system and subsystem requirements.

• Develop and maintain system architectures, including functional, logical, and physical views, using MBSE principles.
• Manage system models and ensure traceability of requirements, interfaces, and design decisions throughout the lifecycle.
• Define and manage system interfaces and interface control documentation for internal and external system interactions.
• Plan and support system integration and acceptance activities by defining verification strategies, acceptance criteria, and compliance matrices.
• Review system design and implementation artifacts to ensure alignment with requirements and architectural intent.
• Identify, assess, and communicate technical risks, trade-offs, and system performance impacts to engineering leadership and management.
• Support system deployment and installation from a systems engineering perspective, ensuring requirements compliance.
• Mentor and coach engineers to develop skills in systems thinking, MBSE, and the company’s engineering methodology.
• Contribute to team objectives by supporting cross-disciplinary activities outside immediate expertise when required.

Requirements

• BSc (or equivalent) in Computer Science, Electrical/Electronics Engineering, Systems Engineering, or a related field.
• 5+ years of experience in systems engineering across at least two lifecycle disciplines, such as: Requirements Engineering, System Architecture & Design, MBSE, Integration Planning, Verification & Validation Planning.
• Proven experience defining technical specifications, decomposing requirements, and delivering system designs that meet stakeholder needs.
• Advanced knowledge of system architecture frameworks and patterns.
• Experience applying MBSE principles and modeling tools (e.g., SysML) in system development.
• Familiarity with structured data formats (e.g., XML, JSON) for system interface definitions.
• Basic understanding of relational and non-relational databases relevant to system architecture and integration.
• Understanding of Windows and Linux environments from a system design and deployment perspective, including automation concepts.
• Advanced knowledge of computer networking concepts and architectures.
• Strong analytical, communication, and interpersonal skills to work effectively in multidisciplinary teams.
• Flexibility and willingness to travel to customer sites as required.

Benefits

• Base Salary (Gross) €42K/yr - €49K/yr
• Competitive remuneration package
• Private Medical Insurance package
• Continuous learning in new technologies
• Opportunity to work in large-scale projects with talented people