Technical Infrastructure & Network Architect
KEYES
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Job summary
KEYES is seeking a Technical Infrastructure & Network Architect to lead architecture across infrastructure, network, cloud and hybrid environments in Belgium and Europe. You will define coherent, secure architectures and ensure delivery from design through implementation to operations, while considering applications, data flows, trust zones, and integration mechanisms.
You will collaborate with Enterprise, Solution, Data, Cloud and Security Architects, and with Infrastructure, Network, DevOps
Qualifications
- 10+ years in infrastructure/network architecture or related leadership roles.
- Strong expertise across infrastructure & network architecture.
- Ability to define target architectures, produce HLDs and challenge detailed designs.
- Knowledge of ArchiMate and TOGAF or equivalent methodologies.
- Working knowledge of AWS/hybrid cloud architecture and cloud networking.
- Understanding of APIs and modern integration patterns.
- Identify cross-domain impacts across infrastructure, network, cloud, applications and security.
- Collaborate effectively with architects, engineering teams and suppliers.
- Fluent French and English (professional working proficiency).
Responsibilities
- Translate requirements into technical architecture across hosting, connectivity, performance, security and recovery.
- Define target/reference architectures and reusable patterns across sites.
- Produce high-level designs and review low-level designs.
- Assess risks, dependencies, gaps and operational constraints.
- Challenge proposed solutions and document architectural decisions (ADRs).
- Support production readiness and handover with Build-to-Run requirements.
Skills
Job description
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
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.
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.
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.
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.
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
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.
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?”
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
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
10+ years of experience in infrastructure/network architecture or senior infrastructure engineering, with demonstrated architecture responsibility in complex environments.
Strong expertise across infrastructure and network architecture.
Proven ability to define target architectures, produce HLDs and challenge detailed technical designs.
Good understanding of ArchiMate, TOGAF or equivalent architecture methodologies.
Working knowledge of AWS/hybrid cloud architecture and cloud networking.
Working understanding of APIs and modern integration patterns.
Ability to identify cross-domain impacts and dependencies across infrastructure, network, cloud, applications and security.
Strong collaboration skills with architects, engineering teams, projects and suppliers.
Pragmatic technical judgement balancing security, resilience, operability, cost and delivery constraints.
Native or near-native French and English (professional working proficiency)
A team of enthusiastic, professional colleagues in which there is an excellent atmosphere and where expertise is shared
Tools and infrastructure that are consistently at the forefront of innovation
Personalized career support to help you with your development
Many training opportunities and certifications
A company with a friendly working atmosphere which is dynamic and oriented towards innovation.
Fun times – a food truck, barbecue, after-work events, family day!
Complete salary package
Teleworking opportunities (up to 3 days a week)
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