Technical Infrastructure & Network Architect

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.

• 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)

OUR OFFER

• A team of enthusiastic, professional colleagues in which there is an excellent atmosphere and whereexpertise is shared

• Tools and infrastructure that are consistently at the forefront of innovation

• Personalized career support to help you with your development

• Manytraining 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)

Do you recognize yourself in this description?

Do you want to learn more?

Apply now! You will be contacted shortly