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JOB DESCRIPTION

We are looking for a skilled Controls Software Engineer with CODESYS expertise to design, maintain, and optimize control systems within industrial automation environments. This role involves working on production-grade systems, improving reliability, and supporting performance at scale.

Responsibilities

Develop, debug, and maintain control logic using CODESYS (IEC 61131-3)Troubleshoot system issues using logs, telemetry, and diagnostics toolsOptimize motion control and overall system performanceTest and validate software on industrial hardware platformsProduce technical documentation, change records, and user guidesCollaborate with cross-functional teams for deployment and system improvements

Requirements

Strong experience with CODESYS and structured text programmingKnowledge of industrial automation, PLCs, and control systemsExperience with hardware integration (drives, sensors, fieldbus systems)Problem-solving skills and experience in production support environmentsGood communication and documentation abilities

Nice to Have

Motion/servo control expertiseExperience with robotics or automation systemsFamiliarity with industrial communication protocols (EtherCAT, OPC UA)Exposure to general-purpose programming languages (e.g., C++)

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

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Company: E-Commerce

Role: C++ Developer

Location: Redmond, Washington

Job Type: Hybrid - 3 days onsite in a week

Contract: 12+ Months

Job Description:

We are looking for a C++ Developer to join the next-generation platform team at one of the world's leading e-commerce and logistics companies. The role is part of a strategic effort to rewrite a mature industrial control application from a legacy controls platform into a modern, scalable C++ stack supporting the scaling of an industrial robotic workcell fleet from approximately 1,000 deployed machines today to 5,000-6,000 machines by 2027. This is a contract engagement with strong likelihood of extension. You'll be working alongside an existing team of engineers driving the migration, with day-to-day technical autonomy and direct impact on the architecture that will run thousands of machines globally. The product is a Transfer Cartesian Cell (TCC) is an 8-axis, servo-driven Cartesian pick-and-place workcell that integrates with mobile floor robots inside fulfilment centers. Your role is on the C++ migration side building the new application that will eventually replace CODESYS as the production control layer.

Responsibilities:C++ Application DevelopmentBuild the new C++ control application that will replace the legacy CODESYS implementationDevelop embedded software running on Linux-based industrial PCs in production fulfilment environmentsDesign modular, testable, scalable software with proper unit-test coverage - solving the scaling problem that the legacy platform couldn'tImplement control logic, motion orchestration, device interfaces, and system-level behaviorMigration from CODESYSRead and interpret the existing CODESYS application as the source of truth for the rewriteEnsure functional parity between legacy CODESYS behavior and the new C++ implementationDebug migration issues that require understanding both the legacy and new stacks

Skillsets Required:

Strong C++ embedded development experience - real-time, embedded, or industrial control environmentsHands-on Linux experience - system-level work, debugging, deployment, embedded Linux.

Qualifications:

Direct CODESYS exposure or work with IEC 61131-3 platforms - even basic familiarity is a significant plusIndustrial controls or robotics backgroundEtherCAT, MQTT, or industrial fieldbus protocol experienceOTA / firmware update workflows; Yocto, BitBake, or similar embedded build systemsExperience migrating legacy systems to modern software stack

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

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