Joining KEYES means giving purpose to your talent.

Are you looking for an environment where technology is not an end in itself, but a lever to build a sustainable future? At KEYES, we are not just looking for technical expertise; we are looking for people who share our values.

Do you want to continue your career and grow within one of Belgium’s leading IT companies?

Join KEYES as a Technical Infrastructure & Network Architect!

KEYES supports private and public organizations in Belgium and across Europe in their digital transformation by combining business expertise, technological mastery, and a long-term vision.

We support large enterprises, the public sector, healthcare organizations, and SMEs in all their digital challenges: Infrastructure & Cloud Solutions, Cybersecurity Solutions, Business Software Solutions, Mainframe Solutions, Data & AI Solutions, Advisory Solutions, and Staffing Solutions.

More information: www.keyes.eu

YOUR MISSION

Provide technical architecture leadership across infrastructure, network, cloud and hybrid environments, supporting transformation, modernization and operational initiatives across multiple projects and sites, including industrial/OT environments.

The role is to define coherent, secure, resilient and operable technical architectures and support their delivery from design through implementation and transition to operations.

The architect must be able to reason beyond individual infrastructure components and understand the broader architecture context: applications, data flows, trust zones, integration mechanisms, cloud connectivity, security and operational constraints.

Positioning within the Architecture Organization

The Technical Infrastructure & Network Architect works closely with Enterprise, Solution, Application, Data, Cloud and Security Architects, as well as Infrastructure, Network, DevOps and project teams.

The role is accountable for the technical infrastructure architecture required to host, connect, secure, operate and recover solutions, including network, compute, storage, backup, cloud/hybrid infrastructure, container foundations and observability.

End-to-end architecture is developed jointly. The architect must actively contribute to cross-domain architecture decisions and challenge proposed solutions when required.

Network and infrastructure architecture are considered part of the overall solution architecture, not isolated technical domains.

Key responsibilities

Translate business, application and solution requirements into technical architecture requirements covering hosting, connectivity, performance, availability, security, resilience, backup/recovery, monitoring and supportability.

Define target and reference architectures, reusable standards and technical patterns across sites.

Produce HLDs and architecture documentation, and review LLDs and detailed technical designs.

Analyse impacts, dependencies, risks, architecture gaps, single points of failure and operational constraints.

Challenge solutions proposed by projects, suppliers and engineering teams and assess alternative options.

Document key architecture decisions through Architecture Decision Records (ADRs).

Assess deviations from architecture and technical standards and support the relevant governance and approval processes.

Define Build-to-Run requirements and support production readiness, operational handover and knowledge transfer.

Architecture practices

The architect must be comfortable with structured architecture practices, including:

ArchiMate

TOGAF or equivalent architecture methodology

Architecture principles and standards

Architecture Decision Records

Target-state architecture

Impact and dependency analysis

Architecture governance

The architect must be capable of producing clear, concise and actionable HLDs, architecture diagrams, technical requirements and decision records.

Technical scope

Infrastructure & Network

Strong expertise in:

LAN/WAN, routing, switching, VLANs and subnets

Network segmentation, firewalls, DMZs and security zoning

Wi-Fi and site/datacenter connectivity

Compute and virtualization

Windows/Linux infrastructure foundations

Storage, backup and recovery

High availability and disaster recovery

Hybrid infrastructure and resilience

Cloud & Hybrid

Good working knowledge of AWS architecture and networking, including:

VPC, subnets and route tables

Internet / NAT Gateway

Transit Gateway and VPC Peering

PrivateLink

Security Groups and Network ACLs

Route 53

AWS Direct Connect

The architect must be able to understand AWS Landing Zone constraints and analyse connectivity, routing, segmentation and security implications between on-premise and cloud environments.

API & Integration

Sufficient understanding of modern integration patterns to assess their infrastructure, network and security implications, including:

REST APIs and OpenAPI

OAuth2, OIDC and JWT

mTLS

API Gateway and reverse proxy

API security and rate limiting

Webhooks

Event-driven architecture

Kafka and messaging

AMQP, SFTP and HTTPS

The architect is not expected to replace an Application or Integration Architect but must understand how systems communicate and challenge connectivity requests in their broader architecture context.

For example, the expected approach is not simply:

“Which network flow must be opened?” but:

“Why does this interaction exist, which systems and data are involved, between which trust zones, through which integration mechanism, and what is the target architecture?”

Industrial / OT

Experience with industrial or critical environments is a strong advantage, including:

IT/OT segregation

Industrial DMZs

Factory and edge connectivity

Industrial Wi-Fi

Secure remote access

Production availability and resilience constraints

Key deliverables

Target and reference architectures

HLDs and architecture diagrams

Architecture Decision Records

Technical requirements and design reviews

Architecture risk and dependency assessments

Standards exception records

Architecture inputs to production readiness and operational handover

YOUR PROFILE

10+ years of experience in infrastructure/network architecture or senior infrastructure engineering, with demonstrated architecture responsibility in complex environments.