Senior Controls Software Engineer — CODESYS/TwinCAT

GCS Recruitment; Seattle (WA); Hybrid; USD 140,000 - 190,000; Full time

Job summary

Amazon is seeking a hands-on Controls Software Engineer to develop the software platform behind its next-generation warehouse automation systems. You will design and deploy reusable control software using CODESYS V3, develop robust state-machine based control logic, and integrate industrial hardware across fulfillment sites.

Ideal candidate has 5+ years building production machine control systems, deep experience with CODESYS V3 or TwinCAT, Structured Text, and EtherCAT integration.

Qualifications

• 5+ years building production machine control systems.
• Strong CODESYS V3 or Beckhoff TwinCAT experience.
• Expert-level Structured Text programming.
• State machine architecture and machine sequencing expertise.
• Object-oriented PLC development experience.
• EtherCAT hardware integration experience.

Responsibilities

• Design and deploy reusable control software for warehouse automation.
• Develop robust state-machine based control logic and integrate hardware.
• Scale modular platform across global fulfillment network.
• Collaborate with hardware and software teams to improve reliability.

Skills

State machine design

Object-oriented PLC development

Industrial automation knowledge

Tools

CODESYS V3

Beckhoff TwinCAT

EtherCAT

Structured Text

Job description

Senior Software Engineer - Industrial Controls (CODESYS/TwinCAT)

Location: Seattle/Bellevue, WA | Hybrid

Client is looking for a hands-on Controls Software Engineer to develop the software platform behind its next-generation warehouse automation systems.

In this role, you'll design and deploy reusable control software using CODESYS V3, develop robust state-machine based control logic, integrate real-world automation hardware, and help scale a modular platform across Amazon's global fulfillment network.

What We're Looking For:

• Strong CODESYS V3 or Beckhoff TwinCAT experience
• Expert-level Structured Text programming
• State machine architecture and machine sequencing expertise
• Object-oriented PLC development experience
• EtherCAT hardware integration experience
• 5+ years building production machine control systems

Bonus Experience:

• Conveyor, robotics, warehouse automation, or material handling systems
• IO-Link integration
• JSON/configuration-driven applications
• Electrical drawings and commissioning support

Ideal Candidate: A controls engineer who naturally thinks in state machines, understands industrial hardware, asks the right technical questions before coding, and can build scalable software for high-throughput automation environments.

GCS is acting as an Employment Business in relation to this vacancy.