Job Title - Senior CODESYS Controls Engineer - Material Handling Systems
Amazon OMHS (One Material Handling System)
Location: Seattle/Bellevue, WA (Hybrid preferred) | Remote (US-based) with travel
Project:
Amazon's One Material Handling System (OMHS) organization is building a new, standardized conveyance controls platform for fulfillment centers worldwide. This is a greenfield product development effort, not a retrofit of existing systems.
You will join the Automation Integration Technologies (AIT) team, responsible for developing the controls software stack that will be deployed at scale across Amazon's global fulfillment network.
Technology Stack CODESYS on Linux | Advantech Industrial PCs | EtherCAT (primary fieldbus)
Role Overview
- Develop CODESYS-based machine control logic on Linux industrial PCs
- Build standardized device abstraction layers for motors, drives, sensors, actuators, and I/O
- Assemble reusable control components for conveyors, merges, diverts, and sortation systems
- Perform lab-based hardware integration and controls validation in the Bellevue, WA lab
- Mature software from prototype through production release
- Create technical documentation, runbooks, and handoff materials
- Provide engineering support for the first 1-2 deployments, then transition to deployment teams
Required Skills & Experience
- 5+ years of hands-on CODESYS development (mandatory)
- Strong IEC 61131-3 Structured Text and Function Block programming
- Experience with modular, layered PLC/controls architectures
- Background in industrial automation (material handling, conveyance, sortation, manufacturing)
- Hands-on integration of motors, drives, sensors, actuators, and I/O
- Fieldbus experience: EtherCAT (primary), EtherNet/IP, Profinet
- Familiarity with Linux-based industrial PCs
- Software development discipline: Git, version control, code reviews, structured testing
Important:
TwinCAT / Beckhoff-only experience will not be considered. This role requires direct CODESYS expertise.
Work Model & Travel Expectations
- Hybrid work preferred for candidates based in the Seattle/Bellevue area, with regular lab presence
- Remote US-based candidates are accepted due to CODESYS skill scarcity
- Periodic travel is required for lab-based integration testing and early deployments
- Onsite support is required for the first 1-2 deployments of each new control area
- Travel is planned in advance and fully covered
This role is well-suited for engineers who enjoy building product-quality controls software, working within a defined architecture, and contributing to a platform deployed at global scale.
GCS is acting as an Employment Business in relation to this vacancy.
Codesys Controls Engineer
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