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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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