Opsidius freelance web developer
Opsidius: freelance web developer. I build premium websites, web applications and AI automations. Since 2010, I've been turning businesses' digital frustrations into competitive advantages.
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What I build for you
If your website is slow, your leads drop — that's mechanical. I build performance-first websites (Nuxt or optimized WordPress) when SEO + conversion matter.
If your team wastes time on repetitive operations, I design automation workflows (n8n/Make + AI where it's truly useful) to reduce manual steps and errors.
And if you're trying to launch a product, I deliver web apps / SaaS MVPs with a scalable architecture, so you don't rebuild everything after month 3.
Typical projects
- High-performance marketing site with tracked conversions
- Internal tool replacing spreadsheets + emails
- AI-assisted workflows (support triage, content repurposing, onboarding)
Based in Nantes, working with France + UK clients (remote-first, same process, clear deliverables).
Some real results
What you should expect to gain
"Our old site took 5-6 seconds to load. We were losing visitors before they even saw our offers. Since the redesign, it's 0.5 seconds and our conversions have gone through the roof."
"My support team spent all day answering the same questions. Since the chatbot, 80% of requests are handled instantly. We can finally focus on real problems."
"We were managing everything with Excel and sticky notes. It was chaos. The custom app centralized everything, and my teams got 10 hours back per week. Priceless."
"My site didn't reflect what we do at all. Damien (Opsidius) took the time to understand our identity and translate it visually. Our clients finally say we look professional."
"I used to spend hours adapting my posts for each social network. Now my blog articles automatically turn into platform-specific posts. Massive time saver."
"I had this SaaS idea for 2 years, but no one understood my vision. In 3 months, I had a working product. Today I have 50 paying customers."
What my clients actually gain
Concrete Results
How it works
A simple 4-step process
Discovery call
I analyze your situation in 30 min and identify quick wins.
Custom proposal
You receive a clear quote with scope, price and timeline.
Agile development
I build your solution with regular check-ins to validate.
Delivery & support
Training, production deployment and post-delivery support included.
No technical jargon. Just solutions that work.
3 clear offers to solve your problems
Premium websiteStarting from
- Ultra-fast Nuxt website
- 98+ Lighthouse score guaranteed
Free diagnostic
Learn moreFree quote in 48h
AI AutomationWeb ApplicationStarting from
- Functional MVP in 2-3 months
- Scalable architecture
Free consultation
Learn moreFree quote in 48h
Frequently asked questions
- Opsidius builds websites, redesigns existing websites, develops custom applications and sets up AI automation. I also work as a freelance web developer on more specific needs, using WordPress, Nuxt, n8n, Make or APIs when the project calls for it. I start from your business needs, not from the tool.
- Yes, you can book a discovery call. I analyse your situation in 30 minutes and identify the quick wins. Then I send you a tailored proposal with the scope, price and timeline. The website also has a contact form if you'd rather reach me that way.
- No, you don't need to come to Nantes. Opsidius works remote-first with clients in France and the United Kingdom. I follow the same process remotely, with clear deliverables and regular check-ins. Follow-up stays simple, whether you're in Nantes or anywhere else.
- Yes, I redesign websites when speed, SEO or conversion become an issue. I take a performance-first approach with Nuxt or optimised WordPress, depending on the case. The homepage says it clearly: if your website is slow, your leads drop. That's what I tackle first.
- Opsidius mainly works with WordPress and Nuxt, with a performance-driven technical approach. I can also take on freelance Webflow work if the project suits it, but I don't push a tool for its own sake. I choose the solution based on your needs, your content and your goals.
- Both, and I can also work as a freelance fullstack developer when the project needs more than a showcase website. I deliver web apps, SaaS MVPs and internal tools. The website mentions cases such as replacing spreadsheets and emails, or building a product that needs to launch fast.
- Opsidius isn't limited to the front end. I connect the website, the workflows and your business needs in a single approach. The page covers performance, AI automation and scalable architecture. I also take SEO and conversion into account, not just the interface.
Readytotransformyourbusiness?
Let's discuss your project and see how I can accelerate your growth with AI and web development.