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Maximilian GrätzMG

Maximilian Grätz

Software Developer for AI Agents & Websites

€895/day
Iserlohn, DE
3-7 years
AI Agent
Web Development
SEO
n8n
JavaScript

Average response time: 1 hour

Freelancer profile translated to English.
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About Maximilian

Actions speak louder than words — and results that can be verified.
I develop custom software for companies that want to solve a specific problem: AI agents that take over work. Websites and apps that generate inquiries. Automations that run in everyday life instead of just in presentations.
Instead of self-descriptions, here are some measured figures from my own website: Lighthouse 100 in SEO, Accessibility, and Best Practices. PageSpeed 98 mobile, 100 desktop. Layout Shift from 0.24 to 0. 33 pages, bilingual, hand-built without a CMS.
What I work with: AI agents and LLM integration (Claude API), n8n, C# and .NET MAUI, JavaScript and Node.js, technical SEO, Google Ads, Embedded C.
What you won't get: Promises I can't keep. I also say when something doesn't make sense — better an honest no than an expensive maybe.
See for yourself: quellcode-und-soehne.de
E-commerce
Retail (Small Business)

  • German

    Native or bilingual

  • English

    Conversational

Can work on-site
Iserlohn (up to 50km)

Experience

  • Quellcode & Söhne
    Founder & Developer
    DIGITAL AND IT
    July 2026 - Today (1 month)
    Iserlohn, Germany
    Development of custom software for SMEs: AI agents, Android apps, websites, and automations — from requirements to operation.
    Setup and management of Google Ads accounts for several clients (search campaigns and Performance Max) including conversion tracking and ongoing optimization.
    Technical SEO and performance optimization of existing websites and online shops — measurable via Search Console, PageSpeed, and Lighthouse.
    Complete technical takeover of a live Shopify online shop including tracking setup.
    SEO Web Development AI Agent n8n JavaScript
  • Selbstständig
    Website Creation
    DIGITAL AND IT
    January 2024 - January 2026 (2 years)
    Iserlohn, Germany
    Web development for small businesses and private clients.
    Conception, implementation, and support of websites — hand-built in HTML, CSS, and JavaScript instead of using a builder, including hosting setup and ongoing maintenance.
    From this work, the founding of Quellcode & Söhne in 2026.
    This included domain and hosting setup, image optimization, legally compliant imprint and privacy policy pages, as well as ongoing content maintenance.
    Web Development JavaScript HTML/CSS SEO

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