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Senior Full-Stack Engineer & AI Specialist
Custom Software. AI Built In, Not Bolted On.
Six years shipping production code. I design, build, and support digital products — with AI as a core tool, not an afterthought.
Senior Full-Stack Engineer & AI Specialist
AI built in, not bolted on
Senior Full-Stack Engineer & AI Specialist
AI built in, not bolted on
Approach
How I Work
Six steps from first call to handover. No surprises along the way.
Discovery
A call to understand your need, constraints, and what you're actually trying to build. No forms, no process theater.
Scoping
Problem analysis, scope definition, technical and human constraints mapped out.
Proposal
Precise estimate, timeline, deliverables and milestones — nothing left vague before we start.
Design & Build
Iterative development with regular reviews. Architecture, product design and code shipped incrementally.
Delivery
Production deployment, full acceptance testing and code ownership transfer.
Support
Maintenance, fixes and improvements — as much or as little ongoing involvement as you need.
Services
What I Build
Six service lines, from the first commit to production.
Web Software & Platforms
Custom web applications, dashboards and internal tools. TypeScript, React, Node.js — architecture to deployment.
Learn moreSaaS & MVP
SaaS product design and build from scratch. From zero to first paying customer, without over-engineering.
Learn moreWebsites & Landing Pages
Corporate sites and marketing pages built for performance. SEO-first, Core Web Vitals optimized.
Learn morePWA & Mobile Apps
Cross-platform React Native apps or PWA when native is overkill. App store and enterprise distribution.
Learn moreAI Integration
LLM, RAG, agents and automation — integrated where they deliver measurable value, not just to add the feature.
Learn moreTechnical Leadership
Team supervision, code audits, hiring and on-demand CTO-as-a-service for critical projects.
Learn more
Projects
Selected Work
Representative projects — details available on request.
Rotorean
Cut
Top 10 du Bâtiment
Le vôtre ?
Testimonials
What They Say
Casian understood our technical constraints from the first week. The project shipped on time with an architecture our team could take over without friction.
The AI integration he built made a significant difference to our processing time. No over-promising — just concrete results.
We needed someone who could both write code and drive the project scope. Casian handled both with rigour and efficiency.
Why Me
What I Bring to Each Project
Senior from Day One
Six years of production projects. You work directly with the engineer writing the code and making the technical calls — no middleman.
AI Integrated, Not Upsold
LLM, RAG, agents and automation are part of my daily practice. I propose them when they add measurable value — never to check a trend box.
From Idea to Ownership
Scoping, architecture, code and deployment — then a full handover. You leave owning your codebase, with no dependency on me to keep it running.
A project to launch? Let's talk.
Let's discuss your project →About
The Engineer Behind the Work
Six years of shipping production code, from architecture through deployment. My daily tools are TypeScript, Next.js, React Native and Python — and I treat AI as a core part of the work, not a selling point.
I also teach software engineering at university one day a month: that habit of explaining clearly is one I carry into every project. What I aim for is simple — hand you a product you fully own, that holds up over time.
Available for day-rate engagements, fixed-price projects, or on-demand technical leadership.
FAQ
Frequently Asked Questions
- With me directly. For projects that need a larger team, I bring in people from my network — engineers, developers, designers, ops. The composition is discussed and agreed during scoping.
- Day-rate for longer engagements or variable-scope work. Fixed price for well-defined projects. I provide a detailed estimate before anything starts — no surprises mid-project.
- You do. Code lives in your repository from day one. No retention clauses — you leave fully owning the codebase, free to work with any other developer you choose.
- Yes — that's a meaningful part of the work. I translate product requirements into technical decisions and make sure every choice is understood and signed off on your end.
- As a daily development tool, and as a product component when the project calls for it. LLM, RAG, agents, automation — I assess the fit before proposing. AI isn't automatic.
- Yes, before any discussion about your project, if you want one.
Blog
View all articlesLatest Articles
AI integration, product development, TypeScript — no fluff.
- AI Integration5 min read
Integrating LLMs into a React Application
Streaming, server architecture and error handling — what you actually need to get right before shipping an LLM feature in your React product.
- Methodology6 min read
From Idea to MVP in Six Weeks: What I've Learned
How to structure an MVP for a six-week delivery without shortcuts that cost you later. What I've taken away from multiple cycles.
- TypeScript4 min read
TypeScript Strict: Why I Never Turn It Off
The strict flag in tsconfig.json gets challenged on almost every project. Here's why I never give in, and what it concretely changes.
Contact
Let's Talk About Your Project
Describe what you need in a few lines. I'll get back to you within 48 hours.