Software Design Engineer Industrial Automation and Airport Security Systems Location: North West UK Cheshire (must be based in the region) Type: 6-Month Contract Permanent (Full-time) Salary: £60,000 £80,000 On-site: 5 days per week (38 hours) with global travel requiredAbout the Role We are seeking an experienced Software Design Engineer to join a specialist engineering team delivering advanced automated material handling and aviation security systems used in airports worldwide.This role focuses on the design, development, integration, testing, and commissioning of software solutions that control high-throughput conveyor, robotics, and automated screening systems. You will work across the full project lifecycle, from concept and software architecture through to deployment, commissioning, and ongoing support.Key Responsibilities Design, develop, and maintain software solutions for automated material handling and conveyor systems.Develop control software using Siemens TIA Portal and S7 PLC platforms.Create and maintain software architecture, functional specifications, and system documentation.Integrate software with robotics, HMI, SCADA, vision, and third-party control systems.Configure industrial networks, managed switches, VLANs, redundancy protocols, and cybersecurity measures.Support factory acceptance testing (FAT), site acceptance testing (SAT), and commissioning activities.Diagnose and resolve software and system issues in live operational environments.Collaborate with