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I will build a custom internal tool or business API for you

B
busterlord
B
busterlord
Markus Schuetze
build a custom internal tool or business API for you
Full Screen
build a custom internal tool or business API for you
Full Screen
Full Screen
build a custom internal tool or business API for youbuild a custom internal tool or business API for youbuild a custom internal tool or business API for you

About this gig

Need a custom internal tool built exactly for your workflow? No bloated SaaS, no unnecessary features just what you need, built fast and ready to use.


I build custom tools and APIs from scratch with a modern, production-grade tech stack: Next.js, React, TypeScript, Supabase (PostgreSQL), Node.js, and Tailwind CSS.


Examples of what I build:


- Quote and invoice generators with PDF export

- Client dashboards with login and data overview

- Internal CRM or lead tracking tools

- Data import and processing (CSV/Excel to structured views)

- REST APIs with authentication and documentation

- Booking and scheduling tools

- Automated report generation

- Admin panels with role-based access


Everything is custom-coded, responsive, and deployed. No WordPress, no page builders, no templates. You get clean source code and full ownership.


I run my own SaaS products in production, so I know how to build software that works reliably every day not just in a demo.


Send me a message with your project idea. I will respond within a few hours with a clear plan and timeline.

  • Programming language

    • HTML & CSS

  • Expertise

    • Algorithms & Data structures
    • Debugging
    • Performance
    • Security
    • Databases

  • Frontend framework

    • Next.js
    • React.js
    • Tailwind CSS

  • Backend framework

    • Express.js
    • FastAPI
    • Next.js
    • Node.js

Get to know Markus Schuetze

Markus Schuetze

Fullstack Developer Nextjs, React, n8n Automations

  • FromGermany
  • Member sinceDec 2019

  • Languages

    German, English
Fullstack developer based in Germany. I build production-grade web apps, workflow automations, and custom business tools from scratch — no templates, no page builders. Core stack: Next.js, React, TypeScript, Tailwind CSS, Supabase, Node.js, n8n. What I deliver: → Modern websites & landing pages → SaaS dashboards & admin panels → n8n workflow automations (self-hosted & cloud) → Custom internal tools (CRM, invoicing, reporting) → API integrations, Stripe, PDF generation I run my own SaaS products in production daily. Fast communication, fixed deadlines. Fluent in English and German.

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