Solutions Architect

About the Job

NISH Tech is seeking an experienced Senior Solution Architect to lead integration architecture initiatives within a large enterprise environment in Belgium. This onsite role bridges the gap between operational technology and modern IT systems, designing secure, maintainable, and vendor-neutral integration solutions that support our operational goals today and scale with our ambitions tomorrow.

Duration: 1+ Years
Language Requirement:
Fluency in English + Dutch and French

The ideal candidate brings proven expertise in IT/OT integration within industrial or logistics environments, combined with strong communication skills and the ability to translate complex operational constraints into clear, actionable architectural decisions. You will work at the intersection of operations, IT, and external partners — building consensus, resolving ambiguities, and ensuring that architecture decisions are operationally safe, maintainable, and future-proof throughout the delivery lifecycle.

• Assess the current integration landscape and define scalable, secure, and vendor-neutral reference architectures for operational systems
• Evaluate architecture options and present clear trade-off analyses to support informed decision-making by project and business leadership
• Ensure business logic remains independently owned and evolvable, outside of proprietary equipment software
• Design for high availability and operational resilience, with explicit failover behaviour and graceful degradation across all integration points
• Provide architectural support for event-driven integration initiatives, enabling downstream systems to evolve independently

• Define and document the IT/OT network boundary, including segmentation, access control, and secure communication patterns
• Specify authentication and encryption mechanisms for all interfaces crossing the operational technology boundary
• Ensure compliance with applicable industrial cybersecurity standards and internal security policies
• Promote security-by-design principles across all integration components and delivery teams

• Work closely with Operations teams, IT teams, Business stakeholders, and equipment vendors to translate requirements into clear technical decisions
• Facilitate the resolution of open architectural decisions, navigating the natural tension between operational stability and IT-driven standardization
• Provide architectural guidance and review for development teams throughout the delivery lifecycle
  
  Contribute to architecture governance by establishing interface standards, schema conventions, and integration best practices
• Support project delivery phases with architectural oversight and timely resolution of integration issues

• Produce and maintain clear, unambiguous technical specifications usable as references across business, IT, and vendor stakeholders
• Translate business and operational requirements into concrete, implementable architectural decisions
• Promote architectural best practices across teams and domains
• Stay current on advancements in IT/OT integration, industrial messaging, and cloud-native connectivity patterns

• 10+ years in solution or integration architecture, with proven experience in industrial automation, logistics, or operational technology environments
• Demonstrated experience designing integration architectures between operational equipment and IT or cloud backend systems
• Experience working with equipment vendors to define, review, and validate interface contracts
• Solid understanding of OT network architecture and the security constraints specific to operational environments
• Experience with real-time integration patterns — synchronous and asynchronous communication, latency management, timeout handling, and failover design
• Familiarity with event-driven architecture principles and technologies such as MQTT, AMQP, or Kafka is a plus
• Experience with REST/HTTPS API design and integration gateway patterns

• Strong understanding of IT/OT boundary design — network segmentation, authentication…