IT Architecture & Transformation Consulting

At Exxan, we help ambitious companies — from fast-growing scale-ups to established enterprises — design and transform their software architecture to support growth, agility, and long-term impact.

Whether you’re building your platform from scratch or modernizing legacy systems, we provide the strategic and technical expertise to align your IT foundations with your business goals.

Who We Are

Founded by Laurent Demouge, a senior IT architect and transformation expert, Exxan supports ambitious companies in reshaping their IT landscape with a focus on delivering fast and lasting value.

Laurent has led major IT transformations for companies like Nederlandse Spoorwegen, Mazars, Thales, L’Oréal, and Upshop. He blends strategic vision with deep technical mastery of Domain-Driven Design (DDD), Event Sourcing, Cloud Architecture, Microservices, and CQRS.

Core Expertise

• Modern Software Architecture (Cloud, Microservices, Event-Driven)
• Legacy System Transformation
• Strategic Design with DDD & Bounded Contexts
• ERP, CRM, PSP & Payment System Integration
• Technical Leadership & Product Team Alignment
• Coaching and IT Governance Advisory

Our Services

Architecture Audit & Strategic Assessment

We evaluate your current architecture, identify blockers to scalability or maintainability, and provide a clear, actionable roadmap aligned with your business priorities.

Architecture Design & Transformation

From strategic vision to operational implementation — we help you shape and execute a scalable, resilient, and evolutive architecture (Cloud-native, DDD, Event-driven, CQRS).

Fractional CTO / Architect as a Service

Perfect for startups and scale-ups seeking senior tech leadership without a full-time hire. Strategic steering, team mentoring, and architecture decision support, on a flexible subscription model.

Coaching & Enablement

Targeted workshops, hands-on support and training to upskill your teams in DDD, modern architecture patterns, and technical decision-making practices.

Who We Help

• Startups & scale-ups looking to build a robust architecture foundation from day one
• SaaS and product teams needing external guidance to scale safely and efficiently
• Large enterprises tackling legacy modernization or architectural alignment across departments
• Tech leaders who want to challenge, validate, or refine their roadmap with a seasoned architect

What We Deliver

• Clear, realistic architecture vision
• Pragmatic, business-aligned execution
• Collaborative and actionable delivery
• Long-term value through sustainable design

Why Exxan?

Your company’s ability to scale, adapt, and deliver value relies on a well-architected and resilient information system. We help you make the right strategic and technical decisions to boost your agility and efficiency.