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

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

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

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

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

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

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Are you a software engineer who likes your code to move real machines? A major name in robotics and automation is building out the team behind one of the largest robotic deployments anywhere - thousands of automated workcells running across high-volume operations - and is looking for a Controls Software Engineer to help keep that fleet fast, stable, and improving.

This isn't a traditional PLC seat. It's a software role that happens to live in a controls world. Most of the team came up through C and C++ and learned the control platform on the job - so what matters here is real software-engineering ability paired with hands-on experience around machines, motion, and hardware.

What you'll work on

Hunting down and fixing bugs and faults in control software running across a large fleet of deployed machinesPushing rate and throughput improvements through the servo, motion, and state-management layersGetting hands-on with hardware in the lab - servos, drives, sensors, vision, and conveyanceTracing problems through telemetry, logs, and alarms, and owning fixes from root cause to rolloutWriting the change documentation and runbooks that keep fleet-wide deployments safe

The live system is written in Structured Text (CODESYS) on Linux-based industrial PCs, with a move to modern C++ already in flight. It's a big, established codebase - strong software instincts matter as much as controls knowledge.

The two things that really matter

Genuine controls experience - you've written software that drives physical hardware: machine control, motion/servo, robotics, or embedded real-time systems.Strong software development in a modern lower-level language - C, C++, Rust, or Structured Text - with the discipline to work cleanly inside a large, mature codebase.

Nice to have

Structured Text on any platform (CODESYS, TwinCAT, Allen-Bradley, Siemens)Embedded, real-time, or industrial software backgroundMotion/servo control, robotics, or pick-and-place / Cartesian workcell experienceSystem-level Linux; EtherCAT or other industrial fieldbusExperience keeping production or large-scale systems running

Level

Open from strong mid-level engineers (3-5 years) who can own their work, through to seasoned engineers ready to plug straight in. The blend of controls exposure and software ability is what counts - not a specific title.

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

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A leading robotics and automation organization is seeking a Controls Software Engineer to join the team behind one of the largest industrial robotics deployments in the world - a fleet of advanced robotic pick-and-place workcells operating across automated fulfillment sites, scaling from over 1,000 machines today to several thousand in the next two years.

This is a software-engineering role in a controls environment - not a traditional PLC position. The team is built largely of engineers from C/C++ software backgrounds who work hands-on with real industrial control hardware. If you pair genuine software-development ability with real controls or automation experience, this is a rare chance to do deep, high-impact work at extraordinary scale.

The Role

As a Controls Software Engineer, you'll support and improve the control software running across the deployed robotic fleet:

Investigate and resolve bugs and faults in the deployed control application across a large fleet of machinesDrive rate and throughput improvements across the servo control, motion orchestration, and state-handling layersWork hands-on with real hardware in the lab - servos, drives, sensors, vision systems, and conveyanceDiagnose issues from telemetry, logs, and alarm history; take fixes from root cause through to deploymentAuthor change documentation and runbooks, and align stakeholders before fleet-wide rollouts

The deployed application is written in Structured Text (CODESYS) on Linux-based industrial PCs, with a parallel migration into modern C++ underway. The codebase is large and mature - success here is as much about strong software-engineering instincts as it is about controls.

What We're Looking For (Non-Negotiables)

Real controls experience - hands-on work with industrial control systems, machine control, motion/servo, robotics, or embedded real-time automationA firm grasp of software development in a modern, lower-level language - ideally C, C++, Rust, or Structured TextThe ability to navigate and contribute to a large, mature codebase with strong software-engineering disciplineWillingness to work on-site in Seattle or Boston

Important: CODESYS and Structured Text are not strict requirements. Most of the team came from C/C++ backgrounds and picked up CODESYS on the job. If you have strong lower-level software skills and genuine controls or automation experience, you're in scope - the Structured Text can be learned on the job.

Strongly Preferred

Structured Text on any platform - CODESYS, TwinCAT, Allen-Bradley, SiemensEmbedded, real-time, or industrial software experienceServo/motion control, robotics, or Cartesian / pick-and-place workcell backgroundLinux at the system level; EtherCAT or industrial fieldbus experienceExperience supporting production or fleet-scale systems

Experience Level

Open to strong mid-level engineers (3-5 years) who can own and deliver, through to senior engineers who can plug in immediately. What matters is the combination of real controls exposure and genuine software-engineering ability.

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

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Controls Software Engineer - Structured Text

Industrial Robotics Program | Contract Engagement | Seattle, WA or Boston, MA (On-Site) | Immediate Start

About the Opportunity

We are hiring a Controls Software Engineer to join a high-impact engineering team supporting a large-scale industrial robotics program at one of the world's leading e-commerce and logistics companies. The program operates a fleet of over 1,000 robotic pick-and-place workcells across global fulfillment centers today, scaling to 5,000-6,000 machines by 2027.

This is a hands-on, technically deep contract engagement with strong likelihood of extension. You will work inside a small, tight-knit team of controls and software engineers responsible for keeping the deployed fleet running reliably and improving its performance at scale.

The Program

The product is a Transfer Cartesian Cell (TCC) - an 8-axis, servo-driven Cartesian pick-and-place robotic workcell. It integrates with mobile floor robots inside fulfillment centers: the floor robots deliver pods of totes to the cell, and the TCC reaches in, retrieves the totes, and places them onto conveyance systems for downstream handling.

The deployed fleet runs on an IEC 61131-3 control platform on Linux-based industrial PCs. The architecture is mature - this is not greenfield development. Your focus is hardening the deployed fleet, reducing faults, and closing performance gaps while a parallel next-generation platform is developed alongside.

What You'll Be DoingSustainment and Fault Reduction (80-90% of the work)Investigate and resolve bugs and faults in the deployed control application running across 1,000+ machines in the fieldDiagnose issues using machine telemetry, logs, alarm history, and operational data; drive fixes from root cause through deploymentSome fixes require feature-level rework - rethinking modules to remove complexity and improve reliability rather than patchingRate, Throughput, and PerformanceAddress rate gaps and workcell throughput shortfalls - the team is currently behind aggressive performance targets, so your impact is visible quicklyWork across the servo control layer, motion orchestration, and state handling to close performance gapsIntroduce targeted improvements that make the machines faster and more reliable at fleet scaleLab and Hardware TestingWrite, test, and validate control code on physical test machines located on-siteWork hands-on with real hardware - servos, drives, sensors, vision systems, and conveyance componentsDefine test cases and provide QA context for downstream validationDocumentation and Change ManagementAuthor Management of Change Memos (MCMs) detailing each change going to the fieldDrive stakeholder alignment and approval across deployment, operations, hardware, and field support before changes ship fleet-wideCreate runbooks, troubleshooting guides, and hardware failure documentationWhat We're Looking ForMust-HavesStrong IEC 61131-3 Structured Text development experience - this is the core requirementReal controls / PLC software development backgroundAbility to independently own tasks, execute, and deliverHands-on experience with industrial hardware - servos, drives, sensors, motion systemsWillingness to work on-site in Seattle or BostonStrongly PreferredTwinCAT experience - aligns directly with the platform and ways of workingCODESYS experience - ideal, though not requiredServo control, motion, Cartesian, or pick-and-place workcell backgroundEtherCAT or industrial fieldbus depthExperience supporting fleet-scale or production systems, not just single-machine commissioningStrong technical writing - runbooks, change memos, troubleshooting guidesNot a FitLadder-logic-only backgrounds without Structured TextCandidates unable to work on-site in Seattle or BostonExperience Level

We are open to a range of experience levels. Mid-level engineers with 3-5 years are welcome provided they can own tasks and deliver independently. Senior engineers who can plug in immediately are equally welcome. What matters is demonstrated Structured Text capability and the ability to execute.

Location and On-Site Requirement

This role is on-site in Seattle, WA or Boston, MA. Test hardware lives in the lab and close collaboration with the team is essential, particularly in the first few months. For candidates committed to relocating, a short-term arrangement (e.g., weekly travel for the first ~2 months while relocation is completed) can be documented as part of the contract.

Engagement Details

Location: Seattle, WA or Boston, MA - on-site

Contract: Milestone-based contract engagement with strong likelihood of extension

Start: As soon as possible - interviews happening now

Hours: Full-time

How to Apply

Send your resume with a brief note covering your Structured Text experience (and the platforms you've used it on - CODESYS, TwinCAT, Allen-Bradley, Siemens, etc.), the types of machines and systems you've programmed, and your willingness to work on-site in Seattle or Boston. We're moving quickly - candidates who can demonstrate real Structured Text depth will be prioritized.

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

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Controls Software Engineer - Structured Text

Industrial Robotics Program | Contract Engagement | Seattle, WA or Boston, MA (On-Site) | Immediate Start

About the Opportunity

We are hiring a Controls Software Engineer to join a high-impact engineering team supporting a large-scale industrial robotics program at one of the world's leading e-commerce and logistics companies. The program operates a fleet of over 1,000 robotic pick-and-place workcells across global fulfillment centers today, scaling to 5,000-6,000 machines by 2027.

This is a hands-on, technically deep contract engagement with strong likelihood of extension. You will work inside a small, tight-knit team of controls and software engineers responsible for keeping the deployed fleet running reliably and improving its performance at scale.

The Program

The product is a Transfer Cartesian Cell (TCC) - an 8-axis, servo-driven Cartesian pick-and-place robotic workcell. It integrates with mobile floor robots inside fulfillment centers: the floor robots deliver pods of totes to the cell, and the TCC reaches in, retrieves the totes, and places them onto conveyance systems for downstream handling.

The deployed fleet runs on an IEC 61131-3 control platform on Linux-based industrial PCs. The architecture is mature - this is not greenfield development. Your focus is hardening the deployed fleet, reducing faults, and closing performance gaps while a parallel next-generation platform is developed alongside.

What You'll Be DoingSustainment and Fault Reduction (80-90% of the work)Investigate and resolve bugs and faults in the deployed control application running across 1,000+ machines in the fieldDiagnose issues using machine telemetry, logs, alarm history, and operational data; drive fixes from root cause through deploymentSome fixes require feature-level rework - rethinking modules to remove complexity and improve reliability rather than patchingRate, Throughput, and PerformanceAddress rate gaps and workcell throughput shortfalls - the team is currently behind aggressive performance targets, so your impact is visible quicklyWork across the servo control layer, motion orchestration, and state handling to close performance gapsIntroduce targeted improvements that make the machines faster and more reliable at fleet scaleLab and Hardware TestingWrite, test, and validate control code on physical test machines located on-siteWork hands-on with real hardware - servos, drives, sensors, vision systems, and conveyance componentsDefine test cases and provide QA context for downstream validationDocumentation and Change ManagementAuthor Management of Change Memos (MCMs) detailing each change going to the fieldDrive stakeholder alignment and approval across deployment, operations, hardware, and field support before changes ship fleet-wideCreate runbooks, troubleshooting guides, and hardware failure documentationWhat We're Looking ForMust-HavesStrong IEC 61131-3 Structured Text development experience - this is the core requirementReal controls / PLC software development backgroundAbility to independently own tasks, execute, and deliverHands-on experience with industrial hardware - servos, drives, sensors, motion systemsWillingness to work on-site in Seattle or BostonStrongly PreferredTwinCAT experience - aligns directly with the platform and ways of workingCODESYS experience - ideal, though not requiredServo control, motion, Cartesian, or pick-and-place workcell backgroundEtherCAT or industrial fieldbus depthExperience supporting fleet-scale or production systems, not just single-machine commissioningStrong technical writing - runbooks, change memos, troubleshooting guidesNot a FitLadder-logic-only backgrounds without Structured TextCandidates unable to work on-site in Seattle or BostonExperience Level

We are open to a range of experience levels. Mid-level engineers with 3-5 years are welcome provided they can own tasks and deliver independently. Senior engineers who can plug in immediately are equally welcome. What matters is demonstrated Structured Text capability and the ability to execute.

Location and On-Site Requirement

This role is on-site in Seattle, WA or Boston, MA. Test hardware lives in the lab and close collaboration with the team is essential, particularly in the first few months. For candidates committed to relocating, a short-term arrangement (e.g., weekly travel for the first ~2 months while relocation is completed) can be documented as part of the contract.

Engagement Details

Location: Seattle, WA or Boston, MA - on-site

Contract: Milestone-based contract engagement with strong likelihood of extension

Start: As soon as possible - interviews happening now

Hours: Full-time

How to Apply

Send your resume with a brief note covering your Structured Text experience (and the platforms you've used it on - CODESYS, TwinCAT, Allen-Bradley, Siemens, etc.), the types of machines and systems you've programmed, and your willingness to work on-site in Seattle or Boston. We're moving quickly - candidates who can demonstrate real Structured Text depth will be prioritized.

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

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