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Olivier RoelantsOR

Olivier Roelants

Fractional CTO / Lead developer

€800/day
Lyon, FR
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Olivier

Part-time senior CTO, I support organizations facing structuring technical challenges or critical projects.
I intervene where:
  • technical decisions have a strong business impact
  • technical debt blocks evolution
  • senior expertise is needed immediately

Types of missions

  • Outsourced CTO / Fractional CTO
  • Web & IS platform redesign
  • Product & technical architecture
  • Technical project security
  • Senior technical reinforcement (lead / hands-on)
  • CTO coaching & mentoring

Value provided

  • Global and structured vision
  • Assumed and explained technical decisions
  • Reduction of technical risks
  • Product / technical / business alignment
  • Skill development for teams
  • Sustainable client autonomy

Key skills

  • Architecture & infrastructure: Containerization / Kubernetes; PaaS (Clevercloud); hybrid architectures. Choices guided by the client's actual maturity
  • DevOps & industrialization: CI/CD; test automation; secure deployments; team support
  • Development: Java (Quarkus, Play); JavaScript / TypeScript (Node.js); React, Vue.js

Zoho Expertise

  • Zoho CRM (advanced customization)
  • Zoho Analytics
  • Zoho Campaigns
  • automations (Deluge)
  • integrations with third-party tools (ERP, RPA, business systems)
When Zoho is used as a component of the IS or as an isolated, standalone tool.

Areas of experience

  • Training & education (including health)
  • Industry & engineering
  • Insurance
  • Health
  • Real estate

Ideal missions

  • Structuring or critical project
  • Redesign or rationalization of existing systems
  • Organization without a CTO or in transition
  • Technical teams to structure or strengthen

Less suitable if

  • need limited to execution
  • technical decisions already fixed
  • lack of willingness for business / technical alignment
Looking forward to discussing your projects and topics.
  • German

    Conversational

  • English

    Fluent

  • French

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • EdTech
    Product Platform Redesign & Technical Reinforcement
    EDUCATION AND E-LEARNING
    March 2023 - January 2026 (2 years and 10 months)
    Role:Outsourced CTO / Senior Technical Reinforcement
    Duration:Long-term mission
    Sector:EdTech – Health

    Description

    EdTech startup with an MVP product, composed of heterogeneous and difficult-to-maintain components.

    Intervention to:
    • Frame the product and technical vision
    • Define the target architecture
    • Assist in choosing the development provider
    • Secure delivery in a junior team context
    • Directly intervene on code (reviews, peer programming, development)
    • Implement CI/CD and industrialization
    • Re-evaluate hosting choices (abandon Kubernetes → PaaS)
    Migrate infrastructure to Clever Cloud.

    Results

    • Unified and scalable platform
    • Significantly improved code quality
    • Team skills enhanced
    • Simplified infrastructure adapted to client capabilities
    • Long-term technical risk reduction
    Learning Management System Keycloak Quarkus CTO Lead Developer
  • Industrie navale
    Zoho CRM Multi-Entity Deployment
    RAW MATERIALS INDUSTRY
    February 2023 - January 2026 (2 years and 11 months)
    Role:Zoho CRM Expert / Functional Architect
    Duration:2 years
    Sector:International B2B Industry

    Description

    Subsidiary of a large industrial group formed from the merger of several entities, with heterogeneous commercial practices and no unified CRM.

    Intervention to:
    • Define a common CRM for the 3 entities
    • Model commercial and business processes
    • Design and deploy Zoho CRM with an advanced level of customization
    • Implement group reporting (Zoho Analytics)
    • Integrate marketing tools (Zoho Campaigns)
    • Ensure integration with third-party tools (document RPA, ERP-like flows)
    Co-construction approach aiming for complete team autonomy.

    Results

    • Unified CRM for 3 international entities
    • Adoption by multi-country teams
    • Reliable reporting compliant with group requirements
    Zoho CRM Zoho Analytics SaaS REST API
  • Organisation de formation
    Complete Information System Redesign (Health / Training)
    EDUCATION AND E-LEARNING
    January 2024 - August 2024 (7 months)
    Role:Outsourced CTO / IS Architect
    Duration:Long-term mission (multi-year)
    Sector:Regulated Training – Health

    Professional training organization with an old information system, heavily burdened by technical debt and hindering business evolution.

    Intervention as an outsourced CTO to:
    • Analyze the existing system and its regulatory constraints
    • Define the target information system
    • Design several redesign scenarios (progressive vs. Big Bang)
    • Make technical choices with management
    • Manage the redesign without business interruption
    Implementation of a hybrid architecture (SaaS + custom), with Zoho integrated as a structuring component of the IS (CRM, business processes, interconnections).

    Results
    • Clear and shared IS vision
    • Reduced migration risks
    • Secure progressive redesign
    • IS designed to evolve over several years
    IS Architecture CTO Business Analyst Zoho CRM Zoho Deluge

Recommendations

IB
Gabrielle CarpelGC
Isabelle Brierre and 1 other person have recommended Olivier

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Education

  • IT Engineer, Information Systems Design
    Ecole Centrale Paris
    2008

Skill set

Categories