Freelance developer of ultra-fast websites, based in Brussels
I work with SMEs and startups
Together, we build extraordinary experiences for their customers.
Nallian
Air cargo software solution
A B2B SaaS website redesign that loads in under a second
Stamp
Gamified city exploration
Turning every building you walk past into a card worth collecting
Harmonia
Family habit-tracking app
Helping families build positive habits at home
Coddy
Escape-game e-commerce platform
Urban escape games
Heat Me
Belgium's first heating network
Belgium's largest network of heating specialists
Your project
Request a quote What if the next project here was yours?
Ultra-fast sites and apps, built to measure.
No unhappy clients here
Otherwise, I consider the job unfinished.
Sébastien is always attentive and understood our needs perfectly when it came to redesigning our website! The new site looks great and was delivered on time. We've already gained a few customers thanks to the improved SEO of the new site
Didier Boulvin
Coddy
Numinam's technical and design vision has enabled us to improve our lead generation flows. A big step forward.
Jérôme Van De Sande
Product & Data Leader • Heat Me
At Nallian we build solutions that are trusted by the world's leading airports, ground handlers and logistics companies. But our website no longer reflected that level of excellence. This redesign ensures our first impression matches the quality of…
Jean Verheyen
CEO • Nallian
The new website much better reflects who we are. It tells our story more clearly, it's easy to navigate, it looks fresh and modern. It is more Nallian.
Joke Aerts
Director of Marketing • Nallian
I help you do three things.
Stand out.
A custom site, fast and polished, not a template your competitors already use. Your prospects compare: the first impression does the rest.
Build trust.
A site that loads instantly and looks serious. Your prospects figure that if the site is at this level, the business is too.
Grow your margins.
AI will be tomorrow's traffic source. You need a site that's ready for it, and above all a site that turns those visitors into clients.
How? By working with you on every step of the value chain
Results build over time: your site will perform at launch, and my job is to keep it that way.
01 UX / UI design
from €700
01 UX / UI design
from €700
Before a single line of code, we clarify your visitors' journey and the image you project. A design built to reassure and guide toward action, not just to look nice.
What's included
- Research and scoping
- Mockups and clickable prototype
- Conversion-focused copy
- Design system
What you get
- Approved mockups
- Navigable prototype
- Visual identity
02 Ultra-fast website creation
from €1,400
02 Ultra-fast website creation
from €1,400
I build your custom website: it loads in under a second and turns your visitors into quote requests. No template, no plugins to maintain, and a codebase you own 100%.
What's included
- Astro development
- Loads in under a second
- Google PageSpeed score 95+
- Responsive and editable content
What you get
- Website live
- Code, domain and access (100% ownership)
- Hands-on training
03 SEO / AEO / GEO
from €700
03 SEO / AEO / GEO
from €700
Your customers search on Google and ask ChatGPT. I structure your website so it shows up in both places. When someone looks for what you do, you're the one they find.
What's included
- Technical SEO
- Structured data
- Optimized content
- Ranking tracking
What you get
- Indexed and structured site
- Ranking report
- Content recommendations
04 Automation
from €700
04 Automation
from €700
Lead generation, reporting, follow-ups: I automate the tasks eating up your team's time, with or without AI. Measurable results in 4 to 6 weeks.
What's included
- Process audit
- n8n workflows
- AI integrations
- Connecting your tools
What you get
- Workflows in production
- Documentation
- Hours reclaimed every week
05 Support and monitoring
05 Support and monitoring
I don't deliver a project and then disappear. Updates, optimizations, A/B testing and dashboards: I stay your long-term partner.
What's included
- Maintenance and updates
- A/B testing
- KPI dashboards
- Continuous optimization
What you get
- Regular reports
- Measured improvements
- A single point of contact
The industries where my experience counts the most
Real estate agencies
Websites that generate qualified leads, without depending on the portals.
Resources
What I've learned, written down in black and white.
The questions you're probably asking yourself
How much does a project with Numinam cost?
I charge €700 per working day, and every service takes a number of days known in advance. A website starts at €1,400 for a landing page, €4,200 for a showcase website and €8,400 for a website with CMS. A first automation project starts at €2,800 and produces results in 4 to 6 weeks. A custom internal tool starts at €8,400.
The initial 25-minute audit is free and commitment-free: that is where we define together the scope and the budget that fit your situation. All the price ranges are shown on the solution pages of numinam.com.
How long does it take to see results with Numinam?
The first automation quick wins deliver measurable results in 4 to 6 weeks: hours recovered, errors eliminated, processes accelerated. A high-performance website is delivered in 4 to 10 weeks depending on complexity.
My approach is designed to prove value quickly, I don't spend 3 months auditing before I start implementing.
Does Numinam work with companies my size?
I primarily work with SMEs of 5 to 100 people, post-seed startups, and growing scale-ups. Whether you're a solo founder who needs a high-performance website or a 50-person SME looking to automate internal processes, my approach adapts.
The free 30-minute audit lets us confirm that I'm the right partner for your situation.
Will AI replace members of my team if I work with Numinam?
No. My goal isn't to replace your team : it's to give them tools that match their ambitions. Automation eliminates repetitive tasks (data entry, reporting, manual follow-ups) so your team can focus on what actually creates value: client relationships, strategy, creativity.
In practice, I automate the work nobody wants to do, not the work that requires human judgment.
Is my data safe with Numinam?
Yes. I apply GDPR standards to all projects. Websites built with Astro are static, no exposed database, no vulnerable plugins, virtually zero attack surface. For internal tools and automation workflows, data stays in your infrastructure or on European servers.
No client data is shared with third parties without your explicit consent.
What's the difference between Numinam and a traditional web agency?
A traditional web agency builds a website and moves on to the next client. With Numinam, you work directly with me, Sébastien, founder and developer. I work across your entire operational efficiency: process automation, high-performance website, custom internal tools, SEO and analytics.
My approach is progressive, I start with an audit, prove value with quick wins, and then build the digital infrastructure. I automated my own company (Coddy, deployed in 9 countries with 100% automated flow) before offering the service to other SMEs.
Is your website slow, invisible on Google, missing from AI answers? Let's check in 25 minutes.
25 minutes is enough to measure your site's real speed, its visibility on Google and its presence in AI answers.
You leave with a clear diagnosis and a concrete action plan, not a sales pitch or a product demo.
It's free, there's no commitment, and it's Sébastien you get on the phone, not a salesperson.