# MENTENSOR // Mariusz Ruski
> AI Product Engineer & Design Technologist
> Enterprise Edge Architectures, Deterministic Agentic Systems & Swiss Interface Craft
> URL: https://mentensor.eu | Contact: contact@mentensor.eu

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## Executive Summary

Mariusz Ruski bridges the 25-year synthesis (2000–2026): visual taste, aesthetic craft, typography, and Lumos design systems on the frontend, converging seamlessly with distributed edge computing (Cloudflare Workers, R2, D1), sub-second latency, deterministic agentic pipelines, and tokenomics (micro-dollars & milliseconds) on the backend.

He operates as an embedded fractional Design Technologist / AI Product Engineer for technical founders, CTOs, and specialized engineering agencies, enforcing a **Minimum Engagement Floor** ($5,000/mo retainer or $10,000/sprint).

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## Core Specializations & Architecture Pillars

### 1. AI Design Systems & Interface Engineering
- Architecting interfaces specifically tailored for generative AI, agent streaming, and LLM workflows.
- Handling token streaming, cognitive load, prompt loops, speculative UI, error states, and network latency.
- Enterprise experience: AI Innovation Hub lead at TAURON Nowa Energia.

### 2. Deterministic Agentic Workflows & Edge Computing
- Building automated pipelines and micro-services on Cloudflare Workers, R2, D1, Supabase, and Python/FastAPI.
- Sub-20ms Semantic Caching, reverse proxy architectures, custom syndication (Onet.pl), and WAF bot shields against unauthorized AI scrapers.

### 3. High-Velocity Prototyping & Visual Craft
- Swiss-Brutalist minimalist aesthetics, extreme typographic precision (Geist Sans / Geist Mono), and surgical high-impact WebGL / Three.js 3D moments.
- Over a decade of deep UI/UX foundations, Webflow Lumos mastery, and executive C-level interactive prototypes.

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## Proven Case Studies (Proof of Work)

### Case 01: Confidential GovTech Venture [NDA] — Institutional PPP Platform
- **Role**: Lead Product Engineer & Full-Stack Architect
- **Scope**: Multi-party infrastructure concession platform for emerging markets.
- **Phase 1**: Rapid workflow validation prototype using Webflow, Memberstack, Airtable, Cloudflare Workers & R2 (streaming heavy dossiers around native upload limits), Make.com.
- **Phase 2**: Full-stack migration to Next.js 14, Supabase (PostgreSQL with Row-Level Security), Cloudflare R2 presigned streaming, and Python/FastAPI microservice for LLM legal contract obligation parsing.
- **Quantified ROI**: Eliminated API rate limits, reduced document processing cycles from days to minutes, achieved institutional investor sign-off.

### Case 02: Qodeca — Extreme Edge Performance Rebuild
- **Role**: Principal Edge Performance Architect & Lumos Design System Engineer
- **Scope**: Architectural rebuild of agency platform (qodeca.com) and client assets (The Bay Club Company).
- **Quantified Metrics**:
  - Total Blocking Time (TBT) slashed from 750ms to 10ms (-98.6%).
  - Mobile PageSpeed score elevated from 41 to 71+ (Best Practices 96, SEO 100).
  - WOFF2 font payload reduction (-65%).
- **Engineering**: Interaction-triggered deferred script loading, Webflow Asset API bypass to direct S3/R2 video streaming, atomic CSS optimization.

### Case 03: Sestry.eu — Edge Media & Multidisciplinary Business Growth
- **Role**: Edge Infrastructure & Growth Systems Architect
- **Scope**: High-scale transnational media platform (Poland & Ukraine).
- **Architecture**:
  - Cloudflare Workers reverse proxy delivering sub-50ms EU edge caching.
  - Real-time custom ATOM syndication feed engineered for Onet.pl.
  - DeepL API automated multi-language translation pipeline.
  - Cloudflare WAF bot shield mitigating scrapers while maintaining high SEO indexability.

### Case 04: TAURON Nowa Energia — Enterprise AI Innovation Hub
- **Role**: AI UX & Product Design Technologist
- **Scope**: Enterprise AI design systems, autonomous internal agents, executive interactive prototyping for Poland's energy leader.

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## Commercial Engagement Models

| Model | Investment Floor | Commitment | Best For |
|---|---|---|---|
| **Fractional AI Product Technologist** | $5,000 / month | Flexible monthly retainer (~5–8h/wk async) | Continuous product evolution, AI design systems, edge architecture advisory, executive sparring |
| **High-Velocity Architecture Sprint** | $10,000 / sprint | 14-day dedicated sprint | Turnkey MVP, zero-latency edge migration, LLM pipeline build, or high-stakes investor prototype |

*Notice: Inquiries below the minimum engagement floor ($5,000) are automatically routed to self-service resources or declined.*

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## Machine-Readable Agent Discovery Endpoints

- **API Catalog (RFC 9727)**: `https://mentensor.eu/.well-known/api-catalog`
- **MCP Server Card (SEP-1649)**: `https://mentensor.eu/.well-known/mcp/server-card.json`
- **A2A Agent Card**: `https://mentensor.eu/.well-known/agent-card.json`
- **Agent Skills Index**: `https://mentensor.eu/.well-known/agent-skills/index.json`
- **ARD Capability Manifest**: `https://mentensor.eu/.well-known/ai-catalog.json`
- **Auth.md Guide**: `https://mentensor.eu/auth.md`
- **LLM Summary**: `https://mentensor.eu/llms.txt`
- **Full LLM Context**: `https://mentensor.eu/llms-full.txt`
- **Semantic Edge Inquiry API**: `POST https://mentensor.eu/api/inquiry`