Curriculum Vitae

Mads Harretche

Hi! I'm Mads 👋

Ruby on Rails Developer based in Copenhagen. I build robust systems, custom platforms, and products that ship.

Available for interesting conversations & opportunities Shipping products since 2019

Full‑stack Ruby on Rails developer with experience building monoliths with clean architecture, real-time features, and API integrations. I’ve rebuilt custom CMS systems, extended SPAs, and co-founded companies while launching multiple SaaS products from zero to production.

Get in touch View experience

How I work

I like building things end‑to‑end: defining the problem, designing a pragmatic solution, and then shipping fast while keeping quality high.

Operating principles

  • Build features that deliver real value and solve actual problems.
  • Keep code clean, maintainable, and well-documented.
  • Take ownership from conception to deployment and beyond.
  • Iterate based on feedback and real-world usage.
  • Collaborate effectively and communicate clearly.
  • Ship incrementally: small, frequent releases over big bangs.

Building & growing

Full‑stack Rails · CMS · React · APIs

Current

Currently working as a Full Stack Ruby on Rails developer at Autobutler, where I’ve built multiple features for their monolith and re-built their custom CMS, including re-styling components with utility-first CSS. I’ve also expanded existing React SPA and REST API projects.

Co-founded NordiumLabs, a software agency, delivering tailored solutions to clients.

Startup experience

POS · Mobile ordering · Real-time

Previously co-founded MIX IT ApS, where we built a complete mobile ordering and POS solution. Created a browser-based POS in Rails + AngularJS with real-time websocket connections, and launched a mobile ordering app & PWA with the Ionic Framework.

Side projects & products

SaaS · AI · APIs

Built and maintain multiple SaaS products including a driving school comparison site, a Danish Robinson List API, a competitor email intelligence tool, and an AI-powered content platform. Always working on new ideas and learning from every project.

Experience

Autobutler

Present

Software Developer · Full Stack Ruby on Rails

Copenhagen · June 2021 – Present

Full Stack Ruby on Rails developer on multiple projects.

  • Built multiple features for a large Ruby on Rails monolith.
  • Re-built a custom CMS, including refactoring Ruby components and re-styling them with utility-first CSS.
  • Expanded an existing React SPA and REST API, integrating new features and improving UX.

MIX IT ApS

Co‑Founder & Software Developer

Jan 2019 – Sep 2021

Co-founded a startup to build a fully functioning mobile ordering and POS solution called Adea.

  • Built a browser-based POS in Rails + AngularJS with a heavy focus on real-time websocket connections.
  • Launched a mobile ordering app & PWA using the Ionic Framework.
  • Acquired a few clients before shutting down the company when we didn’t see enough traction.

NordiumLabs

Co‑Founder

Software agency · Ongoing

Co-founded a software agency with Marcus Wilstrup, delivering tailored web solutions to clients with a strong focus on Ruby on Rails and modern frontends.

Alongside client work, I’ve launched and maintain several profitable SaaS products and tools in the Danish market and beyond.

Side projects & products

🚗 Rails · SaaS

SammenlignKøreskoler.dk

Driving School Comparison Platform

A comprehensive platform that allows users to compare driving schools across Denmark, helping students find the best options based on price, location, and reviews.

Rails AI Data Aggregation Comparison Engine
🔒 API · Compliance

RobinsonlistenAPI.dk

Marketing Compliance API

Danish-market API service that enables businesses to check if individuals are listed on the Robinson List, ensuring compliance with privacy and marketing regulations.

REST API Rails GDPR Compliance
📧 SaaS · Intelligence

Akia.io

Competitor Email Intelligence

SaaS platform that captures and analyzes competitors' emails, providing market intelligence through automated monitoring of email campaigns, social media activity, and marketing strategies.

Rails Email Monitoring Analytics
🤖 AI · Content

Content-Atlas.com

AI Content Orchestration

AI-powered content orchestration platform that transforms a single idea into platform-specific content across multiple channels, streamlining content creation and distribution.

AI / ML Rails Content Generation

Recent work

Snapshot of the last few years
  • Autobutler: Built multiple features for a Ruby on Rails monolith, re-built a custom CMS with utility-first CSS, expanded a React SPA and REST API.
  • NordiumLabs: Co-founded a software agency delivering custom web solutions to clients.
  • MIX IT: Built a complete mobile ordering and POS system with real-time websocket synchronization.
  • Multiple SaaS products: Launched and maintain several profitable side projects.

Let's connect

I'm always interested in hearing about new projects, collaborations, or just having a good conversation about technology and product building. Feel free to reach out on any of the channels below.

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Quick facts

Location
Copenhagen, Denmark
Primary stack
Ruby on Rails, JavaScript, React
Databases
PostgreSQL, SQLite
Frontend
HTML5, CSS, Bootstrap, Tailwind, Semantic UI