Freelancer profile translated to English.
Back to original languageAbout Johan
Part-time IT Director and IT expert for SMEs — I intervene on operational technical blockages: email & deliverability (SPF, DKIM, DMARC), DNS, web security, infrastructure, and n8n automation.
In addition to the usual tasks, I also offer 1-hour video consulting sessions with screen sharing.
You remain in control. 1-hour focused session: we target a specific problem, resolve it completely, or establish a clear action plan for the future.
Areas:
→Email & deliverability: SPF, DKIM, DMARC, Mailgun, Brevo, Sendinblue, DNS configuration
→ DNS & domains: Gandi, OVH, Infomaniak, Cloudflare, DNS zones, propagation, redirects
→ Web security: HTTPS, SSL/TLS certificates, HTTP headers, practical cybersecurity basics
→ Infrastructure: VPS, reverse proxy (Nginx, Apache, Caddy), hosting, deployment
→ Automation: n8n, Make, Zapier: build a workflow without coding
→ Cloud: OVH, AWS, Google Cloud, basic configuration, invoice reading, optimization
For whom:
Leaders of VSEs/SMEs (1–250 employees), IT managers, local authorities, growing structures without an internal IT department.
Concrete results:
→ B2B SME: email deliverability 58% → 95%+ in a few days (gain €30-50K/year)
→ 4.5M+ domains analyzed via MailAuthCheck.com — SaaS tool I created to diagnose SPF/DKIM/DMARC
→ 230+ n8n workflows in production
For long-term missions:
Part-time IT Director for VSEs/SMEs 1-250 employees. Former IT Director & Cloud Operations Director at Saagie (SaaS publisher, 7 years).
I don't just manage — I can code, audit, and resolve issues myself.
French
Native or bilingual
English
Native or bilingual
Can work on-site
Rouen (up to 50km), Louviers (up to 50km), Bernay (up to 50km), Pont-Audemer (up to 50km)
Experience
- Johan DenoyerPart-time IT Director – Independent ConsultantTECHFebruary 2010 - Today (16 years and 6 months)Boissey-le-Châtel, FranceI am a part-time IT Director for VSEs/SMEs (1-250 employees) who need senior IT expertise without hiring a full-time employee.My difference: I don't just do strategic management.I manage your teams/providers AND I can code, audit, and resolve issues myself.Concrete client results:→ B2B company of 45 people: email deliverability 58% → 95%+ (gain €30-50K/year)→ SaaS publisher with 85 employees: multi-cloud optimization -70% (savings €80K/year)My typical interventions:✓ Strategic Management: team leadership, budget approval, IT roadmap✓ Operational Intervention: code reviews, infra audits, emergency resolution✓ FinOps Optimization: reducing multi-provider cloud costs (AWS, GCP, OVH)✓ Cybersecurity: MFA, IAM, SPF/DKIM/DMARC, BCP✓ Automation: recurring processes via n8n, Make, ZapierClient Benefits:→ Reduction of technical and financial risks→ Protection against provider overcharging (technical validation before signing)→ Clear visibility of IT responsibilities and budgets→ Time savings, security, and peace of mind for leadersMy Profile:Former IT Director and Cloud Operations Director (6 years at Saagie, a SaaS publisher).I now work as a part-time IT Director with a structured, operational, and autonomous approach.Target: VSEs/SMEs 1-250 employees | Revenue €0-100M | Normandy + RemoteModel: 2-3 days/month or on-demand via video call
- MailAuthCheckFounder – SPF, DKIM, DMARC & Deliverability SpecialistCONSULTING AND AUDITSSeptember 2024 - Today (1 year and 11 months)Rouen, FranceMailAuthCheck.com is a SaaS email diagnostic tool I created to instantly detect SPF, DKIM, and DMARC flaws on any domain.Objective: prevent your emails from landing in spam or your domain name from being used for phishing.Results:✅ 4.5M+ domains analyzed✅ 178 personalized diagnostics delivered✅ Used by SMEs, accounting firms, and agencies to audit their clientsConcrete client use case:B2B SME with 45 people: email deliverability 58% → 95%+ in a few daysEstimated gain: €30-50K/year in recovered business opportunitiesTechnology: Ultra-fast passive analysis of DNS records and email configuration.👉 Try for free:
- SaagieDirector of Information Systems & Cloud OperationsSOFTWARE PUBLISHINGSeptember 2017 - August 2024 (6 years and 10 months)Le Petit-Quevilly, France- Management of IT, system, network & security teams- Daily cloud operations management and on-premise infrastructure support- Engineering and operation of datacenter and network infrastructures- Responsibility for technical, production, and support processes- Technical specifications for services and security assurance plan (PAS)- Negotiation of tenders with suppliers (RFP/RFQ)- FinOps for multi-cloud providers and IT expense management
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Education
- MSc Network & Systems EngineeringUniversity of Versailles2013
- ChatGPT Prompt Engineering for DevelopersDeepLearning.ai2025https://learn.deeplearning.ai/accomplishments/a1dd7af9-fae8-4b90-a983-deafbebbef02?usp=sharing
Certifications
- AWS Cloud Quest: Cloud PractitionerAmazon Web Services (AWS)2024
- AWS Knowledge: Cloud EssentialsAmazon Web Services (AWS)2023