Production MVP in 4 to 6 weeks. Streaming LLM features, payments, admin, deploy. You own every line of code.
Case study
IBICASA is a live multi-tenant property marketplace for Ibiza. One Rails codebase serves the public portal, the admin panel, a partners REST API and a company portal, routed by hostname.
Ticketing platform for an international jazz festival at The Standard, Ibiza. Per-concert tickets with cart and checkout, instant e-tickets scanned at the door, a box-office cash register, hotel room booking and invoicing. Rails and Hotwire, live for the 2026 edition.
Production client site shipped in 2018 and still running: enquiry flows with Slack webhooks and automated email, built for a villa rental business.
Services
Multi-tenant apps, auth, payments, admin panels and Hotwire frontends. Boring, fast, maintainable. The stack that runs Shopify, GitHub and IBICASA.
Claude and OpenAI integration, streaming UIs, tool use, structured outputs and background pipelines. Prompts and evals your team can maintain after I leave.
Six years as a financial auditor at PwC, Crowe Horwath and PKF Wallast. Audit trails, controls and precision are native to how I build, not learned on your project.
Process
30 minutes, free. You explain the product, I ask the awkward questions.
A scoped, priced proposal within 48 hours. Fixed price, fixed timeline.
Weekly shipped demos on a staging URL. You see progress, not status reports.
Your repo, documentation, tests and deployment. No lock-in.
Pricing
from €9,900
A production Rails app in 4 to 6 weeks. You own the code.
from €4,500
Two weeks adding one AI-powered flow to your existing Rails app.
€3,900 / month
Senior Rails and AI work, 2 days a week. Cancel monthly.
Prices exclude VAT. Larger scope quoted after the call.
About
Eight years shipping production Rails, after six years auditing international clients at PwC, Crowe Horwath and PKF Wallast. Dutch and US citizen, based in Spain, working remotely with teams across Europe and the US.
I run IBICASA.com as sole engineer and build with AI-assisted tooling every day. Le Wagon AI Software Development bootcamp, 2025. Masters in Accountancy and Controlling, Groningen.
Working with one person means no handoffs, no account managers and no junior you never met. You get senior judgement from the first call to the last deploy.
Send a short brief and you'll get a scoped, priced proposal within 48 hours. Or skip the form and grab a slot.
Book a 30 min call