Software for small businesses, founders and creatives
Bring me your problem.
Big or small, simple or hard.
I'll build the solution.
Websites, booking systems, internal tools, audio software, the integration that never quite worked. I design it and I build it, from the first call to the handover. Start small if you want.
Free · No commitment · Response within 24h
Selected Work
A few things I've built and shipped — my own products and client sites, all live.
Sombra Audio
BrandThe creative/audio imprint — plugins, sample packs, sound-design tools. Site live (Plugins / Sample Packs / Tools / Blog). Home of the products below.
Pre-launch
NexoGig
ProductA directory matching artists and venues. Landing live, early waitlist building; the product itself is in development. Pre-launch, not shipped.
Visita Las Alpujarras
BrandMy own local-tourism platform: multi-page site, a commission calculator, and an SEO content base. Doubles as the host brand for several client subdomains.
How I can help
Four ways I help. Every one starts with your problem, not my stack.
Build the product
You've got an idea and no one to build it properly.
I take the idea and build the real thing — web app, SaaS, or site — from first version to live.
Full-stack, whatever the build needs. 25 years of it.
Tell me what you're building →Put AI to work
You want AI in the product or the business, without the hype or the mess.
I add AI where it actually pays off — an agent, an automation, a feature — built to run in production, not a demo.
Agents, RAG, automation, wired into what you already run.
See where AI fits →Sound & audio tools
You need audio software built by someone who actually ships plugins.
Audio plugins (VST3/AU), browser audio tools, and the DSP behind them, built properly.
C++/JUCE and real DSP. It won't be my first plugin.
Talk audio →Get it unstuck
You've got something built that's stuck — brittle, slow, or half-finished.
I get it moving again — modernize, integrate, or rescue it — without a full rewrite.
Deep .NET and legacy experience, architecture, integrations.
Show me what's stuck →Every project is scoped up front, with a fixed price where it makes sense. My costs are low, so for an idea worth building I can work at rates that fit a startup. No retainers you can't walk away from, no big-firm minimums.
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.
The tech was never the point. The problem is.
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