The Global OT Application Engineer implements, integrates, tests, deploys and supports industrial applications across manufacturing sites. The role configures and implements global use cases and applications.

Assigned scope

Integral OT applications across manufacturing sites, including MES/MOM, SCADA, IIoT and CMMS domains.

Purchased, configured and internally developed applications and their interfaces to plant and business systems.

Primary emphasis

Applications are deployed safely, consistently and with clear acceptance evidence.

Plant systems exchange accurate and reliable data through governed interfaces.

Sites receive effective onboarding, technical support and operational handover.

Incidents and recurring technical problems are resolved at the appropriate support level.

Global templates and standards are applied without losing control of necessary local adaptations.

Main tasks / Standard of performance Implementation and Integration

Configure and implement applications, templates and technical components in accordance with the approved solution design.

Gather requirements to integrate applications with PLC, SCADA, DCS, MES/MOM, IIoT, historians and business systems such as ERP, LIMS or QMS.

Configure and troubleshoot industrial data exchange using technologies such as OPC UA, MQTT, REST APIs and SQL.

Ensure that global libraries, naming conventions, templates, interfaces and deployment standards are followed.

Document any approved local deviation from the global template, including its justification and approval, in the application documentation.

Review technical and functional deliveries from developers, vendors and system integrators and challenge gaps in quality,



maintainability or operability.

Testing and Validation

Translate approved requirements and designs into a complete and traceable technical test scope.

Prepare and execute functional, integration and regression tests and support FAT, SAT and user acceptance testing.

Diagnose bugs, coordinate correction and test cycles, and maintain clear test evidence and release documentation.

Verify connectivity, data integrity, performance, resilience, security controls and operational readiness.

Confirm that acceptance criteria are met before recommending release or production deployment.

Deployment and Site Onboarding

Lead the technical work required to take an application from a controlled release into stable plant operation.

Assess site readiness, infrastructure, signals, interfaces, data availability and local dependencies.

Coordinate technical activities with plant stakeholders, local OT teams, vendors and system integrators.

Execute or supervise installation, configuration, commissioning and cut-over activities.

Provide hypercare, technical training, documentation and a clear handover to support and site teams.

Operations and Support

Provide ITIL-based L2/L3 application support: advanced troubleshooting, functional bug-fixing and technical incident escalation across sites (ITIL support levels,



not Purdue Model network layers).

Perform problem management: conduct root-cause analysis (RCA) and implement corrective and preventive actions (CAPA) for recurring application errors.

Manage technical change requests: oversee software modifications from assessment through testing, release and production deployment.

Monitor application health: track application performance, data interfaces (APIs) and support trends to recommend continuous improvements.

Maintain knowledge databases: manage technical documentation, application runbooks, release notes and Known-Error Databases (KEDB).

Plant and Technical Team Interface

Act as the practical interface between plant operations and the teams that design, build and supply the applications.

Translate plant constraints and operational issues into actionable technical requirements and bugs.

Explain technical options, dependencies, risks and decisions to plant and business stakeholders.

Coordinate effectively with the Application Owner on priorities, scope, standards and acceptance.

Work with developers on build activities and with delivery leads or Scrum Masters on planning and execution.

Challenge vendors and system integrators on technical quality, delivery evidence and issue resolution, escalating commercial or roadmap matters to the Application Owner.

Skills And Competencies Functional & Technical Competencies

Strong knowledge of at least one relevant application domain: MES/MOM, SCADA, IIoT or CMMS, and of interfaces to PLC, SCADA and DCS systems.

Practical integration knowledge using OPC UA, MQTT, REST APIs and SQL.

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📌 Global OT Application Engineer (Barcelona)
🏢 QUARIQ
📍 Barcelona