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Głogów Małopolski, Poland

Fractional AI Architect | Deterministic GraphRAG Expert

New to Contra

Fractional AI Architect | Deterministic GraphRAG Expert

Cover image for PAY-SENTINEL is a highly deterministic

PAY-SENTINEL is a highly deterministic architectural framework designed to eliminate financial leakage in FinTech refund and payment automation pipelines. This document is a redacted portfolio version of the Master Blueprint, demonstrating how to replace probabilistic "AI Wrappers" with hard, stateful logic. The primary achievement of this architecture is the complete eradication of "Semantic Drift" and False Approval Rates (FAR). By weaponizing Pydantic V2 and GraphRAG, the system incarcerates stochastic AI outputs within rigid JSON schemas, forcing 100% SLA and KYC compliance before any transaction API is triggered. [ARCHITECTURAL IP & LIABILITY NOTICE] This document is a redacted sample of a Master Engineering Blueprint. It is intended exclusively for demonstrating architectural methodology and strategic framework design. It does not constitute a completed engineering source of truth for any third-party production environment. All proprietary frameworks and "Zero-Trust Fail-Safe" methodologies contained herein are the exclusive intellectual property of Łukasz Bazan. As a Fractional Architect, I provide the "Engineering Brain." I do not perform direct application coding. Any attempt to implement these patterns by internal teams is done at the Client’s own risk.

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Cover image for NEXUS-FORGE is a proprietary Tier-0

NEXUS-FORGE is a proprietary Tier-0 architecture designed for global supply chains operating on enterprise-grade ERP systems (SAP/Oracle). This document is a redacted portfolio version of the Master Blueprint, which eliminates the risk of "Stochastic Deadlock" and API Exhaustion by implementing an Asynchronous Sidecar pattern. The primary achievement of this architecture is the transformation of unpredictable AI forecasts into a deterministic "Digital Twin" model powered by a Neo4j Knowledge Graph. This enables the prediction of cascading failures and the calculation of a logistical "Blast Radius" with mathematical precision, completely isolating core operational databases from probabilistic AI models. [ARCHITECTURAL IP & LIABILITY NOTICE] This document is a redacted sample of a Master Engineering Blueprint. It is intended exclusively for demonstrating architectural methodology and strategic framework design. It does not constitute a completed engineering source of truth for any third-party production environment. All proprietary frameworks and "Zero-Trust Fail-Safe" methodologies contained herein are the exclusive intellectual property of Łukasz Bazan. As a Fractional Architect, I provide the "Engineering Brain." I do not perform direct application coding. Any attempt to implement these patterns by internal teams is done at the Client’s own risk.

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Cover image for LEX-SENTINEL is an advanced legal

LEX-SENTINEL is an advanced legal engineering architecture designed for high-stakes Mergers & Acquisitions (M&A). This document is a redacted portfolio version of the Master Blueprint, showcasing how to eliminate the severe legal liabilities (such as "Frankenstein Clauses") generated by probabilistic Naive RAG systems. The primary achievement of this architecture is the deployment of a Spatial Knowledge Graph. Instead of destroying document structure through standard OCR, the system maps exact (X, Y) coordinates of legal PDFs. It guarantees a 100% verifiable, Zero-Paraphrase policy, compressing cross-document liability analysis from weeks to sub-minute, mechanically verifiable audits. [ARCHITECTURAL IP & LIABILITY NOTICE] This document is a redacted sample of a Master Engineering Blueprint. It is intended exclusively for demonstrating architectural methodology and strategic framework design. It does not constitute a completed engineering source of truth for any third-party production environment. All proprietary frameworks and "Zero-Trust Fail-Safe" methodologies contained herein are the exclusive intellectual property of Łukasz Bazan. As a Fractional Architect, I provide the "Engineering Brain." I do not perform direct application coding. Any attempt to implement these patterns by internal teams is done at the Client’s own risk.

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Cover image for CYBER-AEGIS is a proprietary Tier-0

CYBER-AEGIS is a proprietary Tier-0 architecture designed for Enterprise Security Operations Centers (SOC). This document is a redacted portfolio version of the Master Blueprint, showcasing an autonomous SOC Swarm engineered to eliminate Alert Fatigue and probabilistic hallucinations. The primary achievement of this architecture is the mechanical grounding of SIEM logs within a Zero-Trust Knowledge Graph (Neo4j). By utilizing OCSF normalization and a LangGraph Swarm, the system compresses the Mean Time To Detect (MTTD) for complex threats from days to sub-minute resolution, algorithmically rejecting over 90% of false-positive noise before human escalation. [ARCHITECTURAL IP & LIABILITY NOTICE] This document is a redacted sample of a Master Engineering Blueprint. It is intended exclusively for demonstrating architectural methodology and strategic framework design. It does not constitute a completed engineering source of truth for any third-party production environment. All proprietary frameworks and "Zero-Trust Fail-Safe" methodologies contained herein are the exclusive intellectual property of Łukasz Bazan. As a Fractional Architect, I provide the "Engineering Brain." I do not perform direct application coding. Any attempt to implement these patterns by internal teams is done at the Client’s own risk.

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Data Engineer(4)

Security Engineer(3)

Systems Engineer(2)

Pavlo Krasnytsia

Tech Leader | AI, Blockchain & Technology Architect

7: Followers

Tech Leader | AI, Blockchain & Technology Architect

Cover image for Built a secure key management

Built a secure key management and programmable policy platform for Web3 infrastructure, enabling teams to enforce transaction rules, automate approval logic, and protect sensitive signing workflows using hardware-backed controls. This project signals senior-level expertise in security architecture, backend systems, and blockchain operations.

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Cover image for Created a real-time blockchain data

Created a real-time blockchain data platform that streams on-chain data into developer and analytics workflows with low-latency pipelines, indexing, and database delivery. This project showcases strong full-stack architecture, data engineering, and blockchain infrastructure capabilities for modern financial applications.

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Cover image for Developed a real-time on-chain threat

Developed a real-time on-chain threat detection platform that monitors smart contracts, wallets, governance actions, and protocol activity to surface emerging attacks before damage occurs. This project demonstrates strong blockchain security engineering, alerting architecture, and production-grade risk monitoring at scale.

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Cover image for Developed AI-powered semantic search systems

Developed AI-powered semantic search systems using Weaviate as the core vector database. Designed hybrid search (keyword + vector) architecture and integrated large language models for contextual retrieval and summarization. Optimized schema design, embedding pipelines, and indexing strategies to support large-scale document corpora and conversational AI systems.

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135

Security Engineer(2)

Systems Engineer(1)

Data Engineer(1)

Polymath | Strategic Innovator | Versatilist

Polymath | Strategic Innovator | Versatilist

Cover image for Multi-VM Honeypot Network Setup and Log Analysis

Multi-VM Honeypot Network Setup and Log Analysis

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Cover image for AI Data Extraction and Processing

AI Data Extraction and Processing

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Cover image for Automation System - SEO/Marketing Agency

Automation System - SEO/Marketing Agency

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Data Engineer(2)

Security Engineer(1)

Systems Engineer(1)

Christine Straub

Full-Stack AI/ML Software Engineer

$50k+: Earned

1x: Hired

5.0: Rating

76: Followers

Full-Stack AI/ML Software Engineer

Cover image for RAG with AWS Bedrock and

RAG with AWS Bedrock and React

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Cover image for EMR | EHRHealthcare Application ( HIPAA Compliant )

EMR | EHRHealthcare Application ( HIPAA Compliant )

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Cover image for Brandblast AI

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Cover image for Computerized Adaptive Exam Platform

Computerized Adaptive Exam Platform

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Data Engineer(2)

Frontend Engineer(1)

Ship your SaaS MVP in weeks - web, mobile, payments.

$25k+: Earned

14x: Hired

4.9: Rating

103: Followers

Expert

Mentor

+1

Ship your SaaS MVP in weeks - web, mobile, payments.

Cover image for Unexposed – The Document Vault That Can't See Your Documents

Unexposed – The Document Vault That Can't See Your Documents

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Cover image for Introducing Realm - Your *full-stack

Introducing Realm - Your *full-stack Saas Template* for launching your next software product in a day. Available on Contra: Check it out (https://contra.com/products/c7HPzB4W-realm-convex-tan-stack-saa-s-starter) Realm gives you all the plumbing you need so you can focus on your core product feature. It comes with: ✅ Better-auth - Authentication with Org, Member, Roles, Permissions and Invitation. ✅ Convex - Real-time backend with database, file storage . ✅ Stripe and Polar - Payment with lifecycle management for subscription - Choose your preference. ✅ Autosend - Transactional and Marketing email with email templates and webhook setup. ✅ S3 Seam - File storage for private or public file upload to any S3 storage provider of choice - S3, R2, Tigris, etc. ✅ Tanstack Start - Modern web framework - Optimized for Speed, SEO and perfomance. ✅ Dinachi UI - Prebuilt 40+ accessible React UI Component. Live demo at: https://dub.sh/realm-launch

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Cover image for Education Platform Website Development

Education Platform Website Development

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Cover image for Togethr – Turn Community Voice into Product Momentum

Togethr – Turn Community Voice into Product Momentum

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141

Frontend Engineer(3)

Security Engineer(1)

Devowise Studios

Web Design Studio | Brand Identity | Framer & AI Solutions

$5k+: Earned

4x: Hired

5.0: Rating

128: Followers

expert

Expert

+4

Web Design Studio | Brand Identity | Framer & AI Solutions

Cover image for Epos Now - Azure-Powered Data Engineering Pipeline

Epos Now - Azure-Powered Data Engineering Pipeline

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Cover image for Qlik Sense BI Solution Development for Interactive Analytics

Qlik Sense BI Solution Development for Interactive Analytics

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Cover image for Scalable Azure Data Engineering Solution Implementation

Scalable Azure Data Engineering Solution Implementation

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Cover image for SecureCode: AI-Powered Secure Coding Assistant

SecureCode: AI-Powered Secure Coding Assistant

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10

Data Engineer(5)

Frontend Engineer(1)

proLisbon, Portugal

Mobile Apps for Businesses & SaaS | UX/UI + Flutter

$1k+: Earned

3x: Hired

5.0: Rating

119: Followers

Mobile Apps for Businesses & SaaS | UX/UI + Flutter

Cover image for Dating App | Social Networking | Mobile Design

Dating App | Social Networking | Mobile Design

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6

Cover image for Ditch the messy notebooks and

Ditch the messy notebooks and endless scheduling chaos holding your salon back. Handling appointments, staff timetables, and monthly profits manually wastes hours that belong to your clients. Alvi Beauty handles studio administration through one organized digital dashboard. • View daily sessions instantly to prevent double-booking mistakes. • Update worker availability and block off specific hours smoothly. • Separate income from expenses for real-time accounting tracking. • Monitor customer history and review feedback to improve quality. Automating routine booking tasks gives you an instant picture of business health. Make data-driven choices regarding bonuses while providing a highly personalized experience for every guest.

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Cover image for Salon Management Platform | Beauty Tech | SaaS | UX/UI Design

Salon Management Platform | Beauty Tech | SaaS | UX/UI Design

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Cover image for Imagine finishing complex projects in

Imagine finishing complex projects in minutes. Picture effortless graphic design and automated file analysis. Our virtual companion listens to spoken commands, scans PDFs, and builds logos. Keep vital dialogues neat with easy pins. Everything you need for efficient work lives within IntellicaAI.

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Platform Engineer(3)

Full-Stack & AI Dev | TypeScript, Next.js, React, Node

$50k+: Earned

5x: Hired

5.0: Rating

95: Followers

Full-Stack & AI Dev | TypeScript, Next.js, React, Node

Cover image for Full Stack Web App Build

Full Stack Web App Build

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Cover image for Landing page for an ai

Landing page for an ai company.

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695

Cover image for In love with this renaissance

In love with this renaissance style imagery for hero sections.

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588

Cover image for AIUC-1 Standards Interface Demo with React

AIUC-1 Standards Interface Demo with React

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Frontend Engineer(6)

Systems Engineer(1)