PLC Software Engineer (Peripherals & Mobile Robotics)

About the role

Ocado Technology's Athens R&D team owns the PLC software for its Peripherals portfolio, which handles totes in customer fulfilment centres worldwide. The role covers the full control systems lifecycle, from design and prototyping to commissioning and running machines in live warehouses. It combines software engineering with hands-on work on live machinery, with hybrid working.

Key responsibilities

• Design, develop and maintain PLC software for peripheral machines on Beckhoff TwinCAT 3 and Siemens TIA Portal, from concept and prototype to live operation.
• Build and extend shared PLC libraries so new machines can be assembled quickly and reliably.
• Write engineering documents: function lists, software specifications, interface control documents and messaging specifications.
• Validate software early with simulation, automated unit tests and integration tests on Athens test rigs.
• Contribute to safety PLC software and safety specification reviews, following documented safety design.
• Troubleshoot with mechanical and electrical designers and suppliers during development, commissioning and live operation.

Required profile

• Degree in Engineering, Computer Science or a related subject.
• Solid commercial experience developing PLC software for industrial machinery on Beckhoff TwinCAT 3 and/or Siemens TIA Portal.
• Hands-on field experience commissioning automated equipment: I/O checkout, fieldbus and network setup, drive configuration and fault-finding on live machines.
• Good written and spoken English for working with teams in the UK and worldwide.

Required skills

• Strong Structured Text and structured, modular PLC design (function blocks, interfaces, state machines).
• Confidence reading electrical schematics and working with mechanical and electrical engineers.
• Nice to have: experience on both Beckhoff and Siemens platforms, Git, functional safety, motion control, servo drives and IO-Link, simulation or virtual commissioning, Agile (Scrum or Kanban).

What we offer

• Gross annual pay in Greece of EUR 41,800 to 45,500.
• Hybrid working, typically 40% in the office, plus a 30-day working-from-anywhere policy.
• Private medical insurance, meal tickets and home office equipment.
• Share scheme opportunity, regular divisional socials and sports clubs, and access to the Ocado Technology Academy.