AI Consulting & Software Engineering
I Build Software
That Works.
Now With AI.
25 years of engineering. From scientific computing to AI automation. I help businesses modernize without the mess.
What I Build
From quick automations to full-stack applications. Every project starts with understanding your problem.
AI Workflow Audit
We map your manual processes and show you exactly what AI can automate.
From €500A structured deep-dive into your workflows, bottlenecks, and repetitive tasks — with a prioritized action plan and ROI estimates.
Book a Call →.NET Modernization
Upgrade your legacy .NET system to the modern platform — without breaking what works.
From €3,000Migrate from .NET Framework to .NET 10, containerize with Docker, modernize the architecture — incrementally, not big-bang.
Book a Call →AI Dev Workflow Setup
Set up your dev team with AI-assisted development — ship 3x faster.
From €2,000Claude Code, Cursor, Copilot, custom agents — configured for your stack, your conventions, your codebase. Not generic tips, actual setup.
Book a Call →AI Agent Development
A custom AI agent that does real work — not just answers questions, but takes action.
From €3,000Purpose-built AI agents that handle end-to-end business tasks: lead qualification, document processing, customer onboarding, and more.
Book a Call →We offer 20+ specialized services across legacy modernization, AI automation, web development, and audio engineering. No commitment.
How It Works
Three steps. No meetings about meetings.
Discovery Call
30 minutes. Tell me the problem. I'll tell you if I can help — and what it'll take.
Proposal & Plan
Clear scope, fixed price or hourly rate, timeline. No surprises. You approve before any work starts.
Build & Deliver
I build it. You review it. We iterate until it's right. Then I hand it over with documentation and support.
I'm Barry Faassen
A senior software engineer with 25 years of experience across scientific computing at Deltares, global geotechnical platforms at Fugro, and a decade of independent consulting.
I moved to the Alpujarras mountains in Spain to build Mulhacen Labs — a studio where deep engineering meets practical AI.
I work directly with you. No project managers, no juniors, no hand-offs. When I say "I'll build it," I mean me.
Nechite, Granada
Working from the Alpujarras mountains in southern Spain.
Ready to Build Something
That Works?
Book a free 30-minute discovery call. No pitch, no pressure — just a conversation about your problem and whether I can help.
Free · No commitment · Response within 24h