Marco Patzelt

Marco Patzelt

Full-Stack Engineer & Integration Specialist

Specialized in decoupling frontends from complex business logic. I build scalable middleware and robust backends.

Marco Patzelt
Architecture
Serverless
Backend
Node.js

Lean Architecture:
No Enterprise Bloat. Just Performance.

I build software infrastructure that doesn't require an IT department to maintain. Lean Architecture. This means: Maximum speed, no unnecessary license costs, and full independence from sluggish systems.

Infrastructure &
Type Safety

Serverless instead of Server Farms

No maintenance, no downtime. Deployment in serverless environments (e.g., Vercel) means you only pay for compute when it's actually used.

TypeScript Logic

Strict typing prevents errors before they happen. The result is an extremely stable codebase that doesn't break even with complex features.

import { NextResponse } from 'next/server';

import { createClient } from '@supabase/ssr';

export async function POST(req: Request) {

// Typsichere Validierung

const body = await req.json();

const { id } = Schema.parse(body);

const supabase = createClient();

const { data } = await supabase

.from('events')

.select('*');

return NextResponse.json(data);

}

System Status

API Gatewayeu-central-1
24ms
Postgres Replicaread-only
12ms
REALTIME SYNC

Backend & Data

Backend-as-a-Service with Supabase (PostgreSQL).

The Advantage: The same power as enterprise systems, but without the overhead. Data is synchronized in real-time – extremely fast and scalable.

Modular Architecture

Independent components, flexibly connected.

The Principle: It's not just about APIs, but true decoupling. Parts of the system can function independently, be swapped out, or scaled.

Built with

Best-in-Class Tooling. I rely on a modern, proven stack with a large community and long-term support. No experiments, just industry standards.

TypeScript
Node.js
Next.js
Supabase
PostgreSQL
Redis
Gemini API
Vercel
Git
Tailwind
03
Frontend Engineering

Design Implementation & System Integration.

I realize complete web interfaces that are visually convincing and merge seamlessly with the underlying architecture.

Visual Fidelity

"Static layouts turn into functional, responsive websites. I translate designs exactly into code."

Pixel-Perfect
Implementation

Type Safety

"I breathe life into design. How do filters behave? What happens on click? I develop the interaction logic."

Interaction Logic
Behavior

User Experience

"The frontend is not an isolated coat of paint, but the precise counterpart to the backend. Data structures mesh perfectly."

Architecture
Integration

Agentic Orchestration Layer Model.

This is my current Research & Development focus. I build systems that write their own integration code at runtime. This allows any business logic to be dynamically extracted from existing databases – without rigid interfaces or costly IT projects.

System 2 Thinking

The system doesn't "guess". It uses an encrypted thinking loop for plan validation.

agent_runtime.log
> INITIALIZING_COGNITIVE_LAYER...
> LOADING_SCHEMA: public.users
> LOADING_SCHEMA: public.transactions

Glass Box Trust

No loading spinner. You see every SQL query and every thought in real-time.

Input: "Calculate CLTV"
@runtime_generated AUTOdef calculate_cltv(df):avg_value = df['amt'].mean()freq = df['transactions'].sum()return avg_value * freq
EXECUTING
Result: 4,205.50 EUR

CAG instead of RAG

The agent writes Runtime Code. Instead of hallucinations, it generates real, executable code for analytically exact answers.

01
Context
Orchestration
03
Execute

Cognitive Pipeline Layer

No messy "spaghetti diagrams". A central, linear pipeline orchestrates all tools, contexts, and safety checks.

Protocol Verification
ACTIVE
Engine_A (SQL)
4,205,921.00
Engine_B (PY)
4,205,921.00
DELTA CHECK0.00% (MATCH)

Safeguard Protocol

Quantitative answers are calculated via two independent paths. Only results that withstand mathematical verification reach the user.

Featured Project

Automated
Event Booking Architecture

The Task

Technical conception and development of an interface connecting a Webflow frontend with Microsoft Dynamics 365 to map complex booking processes without enterprise overhead.

The Implementation

Middleware Engineering
Node.js Application (Vercel) for decoupling system logic.
Data Synchronization
Real-time reconciliation for bookings.
High-Performance Caching
Upstash (Redis).
Translation Pipeline
DeepL Integration.
View Live Project
View Live Project
Realized at Marketer UX GmbH.
FrontendBackend/CRM
Middleware
Vercel Serverless
POST /api/booking
Redis Lock

"key": "evt_123_lock",

"ttl": 60,

"status": "acquired"

DeepL API

"text": "Porsche GT3",

"source": "DE",

"target": "EN"

CRM Sync
Microsoft Dynamics 365
await crm.create(data)
Engineering Logs

Latest Thoughts.

View all posts

Let's
connect.

I am always open to exciting discussions about frontend architecture, performance, and modern web stacks.

Email me
Email me