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Position Title

Senior Software Engineer - Controls Engineer

Location

Hybrid (Hub-Based)

Preferred Locations:

Seattle/Bellevue, WABoston, MAAtlanta, GAArlington, VA

Candidates must be located near an approved hub location or willing to relocate. This is not a fully remote role.

About the Role

We are seeking experienced CODESYS Controls Developers to join client's Automation Integration Technologies (AIT) team within Outbound Material Handling Systems (OMHS). This role will focus on designing, developing, and deploying software for client's next-generation standardized conveyance control platform, supporting large-scale fulfillment center automation globally.

As part of a highly collaborative engineering team, you will develop reusable control software, integrate industrial hardware, and build scalable applications that power client's automated material handling systems. The platform leverages CODESYS V3 running on Linux-based Advantech IPCs, with EtherCAT as the primary fieldbus communication protocol.

This position requires strong expertise in industrial automation software development, state-machine architecture, object-oriented programming in CODESYS, and real-world hardware integration.

Key ResponsibilitiesSoftware DevelopmentDesign and develop CODESYS V3 control software for client's standardized conveyance platform ("Sprocket").Create reusable, modular Function Blocks and software libraries using IEC 61131-3 Structured Text.Implement robust control logic using CASE-based state machine architecture.Apply object-oriented principles including methods, properties, interfaces, and encapsulation to develop scalable automation frameworks.Develop conveyor-level features, hardware abstractions, and control applications for large-scale deployment.Requirements & System DesignGather and analyze requirements before implementation.Produce clear requirements documents outlining scope, assumptions, edge cases, recovery behaviors, and fault handling.Lead early design reviews and technical discussions with client engineering teams.Translate operational and hardware requirements into software solutions.Hardware Integration & ValidationIntegrate and validate industrial hardware including:Motors and motor drivesSensors and photo-eyesIO-Link devicesActuatorsMDR (Motor Driven Roller) systemsStack lightsConfigure and troubleshoot EtherCAT-based device networks.Conduct hardware validation and testing in client's Bellevue automation lab.Application Assembly & DeploymentInterpret electrical schematics and control area drawings.Develop JSON-based application configurations following predefined schemas.Assemble control applications using reusable software components and hardware abstractions.Support testing, commissioning, and deployment activities.Collaboration & Agile ExecutionParticipate in code reviews with client Control Area Leads.Collaborate through Git-based development workflows.Manage deliverables using Asana.Participate in daily Slack standups and weekly engineering sync meetings.Deliver software iteratively and seek feedback throughout development.Required QualificationsTechnical Skills5+ years of experience developing machine control or industrial automation software.Strong hands-on experience with:Beckhoff TwinCAT Structured Text programmingAdvanced expertise in:IEC 61131-3 Structured TextFunction Block developmentObject-Oriented Programming in CODESYSProven experience designing software using:CASE-based state-machine architecturesFault recovery, safety, and operational state managementExperience integrating industrial automation hardware on EtherCAT networks.Familiarity with Linux-based industrial PCs.Experience using Git and modern software development practices.Behavioral & Engineering CompetenciesStrong requirements-gathering and technical analysis skills.Ability to identify edge cases and ask clarifying questions before implementation.Demonstrated ability to deliver incrementally and adapt to changing requirements.Strong communication and collaboration skills within cross-functional teams.Preferred QualificationsExperience within:Material Handling Systems (MHS)Conveyance and Sortation SystemsPackaging AutomationHigh-Throughput Industrial AutomationDeep understanding of:EtherCAT network architectureIO-Link device integrationAbility to read and interpret:Electrical schematicsControl system drawingsWiring diagramsExperience with configuration-driven applications using JSON schemas.Exposure to C++ and/or Rust development.Previous client Robotics experience (subject to rehire eligibility verification).Experience supporting commissioning and field deployment activities.Project Overview

The team is building a standardized software-defined conveyance control platform that will be deployed across client's global fulfillment network.

The architecture follows a modular "Lego-style" design where:

Hardware devices are abstracted into reusable software components.Conveyor features are developed as reusable CODESYS Function Blocks.Applications are configured through JSON-based schemas rather than custom software development.Standardized control software can be deployed across thousands of equipment instances.

Job Summary:

Our client is seeking a Senior Software Engineer with deep expertise in CODESYS V3 or Beckhoff TwinCAT Structured Text development to build next-generation conveyance control systems

Key Requirements:

5+ years of industrial automation or machine control software developmentHands-on experience with TwinCAT Structured TextStrong expertise in IEC 61131-3 Structured TextProven experience designing CASE-based state machine architecturesCODESYS OOP development (Methods, Properties, Interfaces)Experience integrating motors, drives, sensors, actuators, and EtherCAT devicesLinux-based industrial control systems experienceGit and modern software development practices

Preferred:

Conveyor, sortation, material handling, or warehouse automation experienceEtherCAT and IO-Link expertiseAbility to read electrical schematics and control drawingsJSON-based application configuration experience

This role involves developing reusable control software, integrating real hardware, and supporting large-scale fulfillment center automation deployments.

Join our and help build a standardized software-defined conveyance platform that will support fulfillment centers globally.

You will develop scalable machine control software using CODESYS V3, design reusable automation libraries, integrate EtherCAT-connected hardware, and create configuration-driven applications deployed across complex material handling systems.

Must Have:

CODESYS V3 or Beckhoff TwinCAT development experienceIEC 61131-3 Structured Text programmingState-machine driven controls developmentFunction Block and object-oriented PLC programmingIndustrial hardware integration experience5+ years in automation, controls, or machine software engineering

Nice to Have:

Material handling, conveyor, sortation, or packaging automation experienceIO-Link and EtherCAT networkingElectrical schematic interpretationExperience with commissioning and deployment activities

Join our team and help build a standardized software-defined conveyance platform that will support fulfillment centers globally.

You will develop scalable machine control software using CODESYS V3, design reusable automation libraries, integrate EtherCAT-connected hardware, and create configuration-driven applications deployed across complex material handling systems.

Must Have:

CODESYS V3 or Beckhoff TwinCAT development experienceIEC 61131-3 Structured Text programmingState-machine driven controls developmentFunction Block and object-oriented PLC programmingIndustrial hardware integration experience5+ years in automation, controls, or machine software engineering

Nice to Have:

Material handling, conveyor, sortation, or packaging automation experienceIO-Link and EtherCAT networkingElectrical schematic interpretationExperience with commissioning and deployment activities

Senior Controls Software Engineer

Location: Seattle/Bellevue, WA | Hybrid

Client OMHS team and help build a standardized software-defined conveyance platform that will support fulfillment centers globally.

You will develop scalable machine control software using CODESYS V3, design reusable automation libraries, integrate EtherCAT-connected hardware, and create configuration-driven applications deployed across complex material handling systems.

Must Have:

CODESYS V3 or Beckhoff TwinCAT development experienceIEC 61131-3 Structured Text programmingState-machine driven controls developmentFunction Block and object-oriented PLC programmingIndustrial hardware integration experience5+ years in automation, controls, or machine software engineering

Nice to Have:

Material handling, conveyor, sortation, or packaging automation experienceIO-Link and EtherCAT networkingElectrical schematic interpretationExperience with commissioning and deployment activities

Senior Software Engineer - Industrial Controls (CODESYS/TwinCAT)

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 experienceExpert-level Structured Text programmingState machine architecture and machine sequencing expertiseObject-oriented PLC development experienceEtherCAT hardware integration experience5+ years building production machine control systems

Bonus Experience:

Conveyor, robotics, warehouse automation, or material handling systemsIO-Link integrationJSON/configuration-driven applicationsElectrical drawings and commissioning support

Senior Software Engineer - Industrial Controls (CODESYS/TwinCAT)

Location: Seattle/Bellevue, WA | Hybrid

Amazon 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 experienceExpert-level Structured Text programmingState machine architecture and machine sequencing expertiseObject-oriented PLC development experienceEtherCAT hardware integration experience5+ years building production machine control systems

Bonus Experience:

Conveyor, robotics, warehouse automation, or material handling systemsIO-Link integrationJSON/configuration-driven applicationsElectrical drawings and commissioning support

Senior Controls Software Engineer

Location: Seattle/Bellevue, WA | Hybrid

Join Amazon's OMHS team and help build a standardized software-defined conveyance platform that will support fulfillment centers globally.

You will develop scalable machine control software using CODESYS V3, design reusable automation libraries, integrate EtherCAT-connected hardware, and create configuration-driven applications deployed across complex material handling systems.

Must Have:

CODESYS V3 or Beckhoff TwinCAT development experienceIEC 61131-3 Structured Text programmingState-machine driven controls developmentFunction Block and object-oriented PLC programmingIndustrial hardware integration experience5+ years in automation, controls, or machine software engineering

Nice to Have:

Material handling, conveyor, sortation, or packaging automation experienceIO-Link and EtherCAT networkingElectrical schematic interpretationExperience with commissioning and deployment activities

Senior Software Engineer - CODESYS Controls Developer

Location: Seattle/Bellevue, WA (Hybrid)

Amazon's OMHS Automation Integration Technologies (AIT) team is seeking a Senior Software Engineer with deep expertise in CODESYS V3 or Beckhoff TwinCAT Structured Text development to build next-generation conveyance control systems for Amazon's fulfillment network.

Key Requirements:

5+ years of industrial automation or machine control software developmentHands-on experience with CODESYS V3 or TwinCAT Structured TextStrong expertise in IEC 61131-3 Structured TextProven experience designing CASE-based state machine architecturesCODESYS OOP development (Methods, Properties, Interfaces)Experience integrating motors, drives, sensors, actuators, and EtherCAT devicesLinux-based industrial control systems experienceGit and modern software development practices

Preferred:

Conveyor, sortation, material handling, or warehouse automation experienceEtherCAT and IO-Link expertiseAbility to read electrical schematics and control drawingsJSON-based application configuration experience

This role involves developing reusable control software, integrating real hardware, and supporting large-scale fulfillment center automation deployments.

Senior Software Engineer - CODESYS Controls Developer

Location: Seattle/Bellevue, WA (Hybrid)

Amazon's OMHS Automation Integration Technologies (AIT) team is seeking a Senior Software Engineer with deep expertise in CODESYS V3 or Beckhoff TwinCAT Structured Text development to build next-generation conveyance control systems for Amazon's fulfillment network.

Key Requirements:

5+ years of industrial automation or machine control software developmentHands-on experience with CODESYS V3 or TwinCAT Structured TextStrong expertise in IEC 61131-3 Structured TextProven experience designing CASE-based state machine architecturesCODESYS OOP development (Methods, Properties, Interfaces)Experience integrating motors, drives, sensors, actuators, and EtherCAT devicesLinux-based industrial control systems experienceGit and modern software development practices

Preferred:

Conveyor, sortation, material handling, or warehouse automation experienceEtherCAT and IO-Link expertiseAbility to read electrical schematics and control drawingsJSON-based application configuration experience

This role involves developing reusable control software, integrating real hardware, and supporting large-scale fulfillment center automation deployments.