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Alexandru X's avatar
Alexandru X
Warsaw, Poland
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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21
Cover image for Automation System - SEO/Marketing Agency
Automation System - SEO/Marketing Agency
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25
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Data Engineer(2)
Security Engineer(1)
Systems Engineer(1)
Łukasz Bazan's avatar
Łukasz Bazan
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)
Neil Hanlon's avatar
Neil Hanlon
Bedford, USA
Open Source Infrastructure Expert & Linux Guru
Open Source Infrastructure Expert & Linux Guru
Cover image for Resilient Monitoring Stack for Hybrid Infrastructure
Resilient Monitoring Stack for Hybrid Infrastructure
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15
Cover image for Deployment Stack Revamp with IaC and GitOps
Deployment Stack Revamp with IaC and GitOps
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19
Cover image for Zero-Trust Mesh VPN with Nebula
Zero-Trust Mesh VPN with Nebula
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4
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Platform Engineer(2)
Security Engineer(1)
Systems Engineer(1)
Pablo Pelaez Fundora's avatar
Pablo Pelaez Fundora
Phoenix, USA
Systems Engineer: C++, Linux, & Autonomous Security.
New to Contra
Systems Engineer: C++, Linux, & Autonomous Security.
Cover image for Openbot Semantic Firewall Development
Openbot Semantic Firewall Development
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1
Cover image for ASA DataFest Arizona Data Analysis
ASA DataFest Arizona Data Analysis under NDA
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20
Cover image for Autonomous AI agents pose serious
Autonomous AI agents pose serious security risks when executing unverified system actions. To solve this, our team built an OS-level security layer and telemetry pipeline to safely sandbox and monitor any autonomous agent
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Cover image for Chess: Evolve is a roguelite
Chess: Evolve is a roguelite tower-defense game where you deploy chess pieces as units and defend your King from waves of enemies. Each run gives you a random set of piece cards. Drag to place them on the board, or sacrifice cards to gain mana and redraw!
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42
Systems Engineer(2)
Security Engineer(1)
Data Engineer(1)
Pavlo Krasnytsia's avatar
Pavlo Krasnytsia
Lviv, 79000
Tech Leader | AI, Blockchain & Technology Architect
New to Contra
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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115
Security Engineer(2)
Systems Engineer(1)
Data Engineer(1)
Cory Schmaltz's avatar
Cory Schmaltz
Denver, USA
Full Stack Engineer & AI System Architect & Network Engineer
New to Contra
Full Stack Engineer & AI System Architect & Network Engineer
Cover image for Obsidian Network Architect
Obsidian Network Architect
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23
Cover image for NLP pipeline for Federal Document Processing
NLP pipeline for Federal Document Processing
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22
Cover image for Logistics System for US Army
Logistics System for US Army
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21
Cover image for AI-Powered Automatic Marketing System
AI-Powered Automatic Marketing System
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29
Security Engineer(1)
Systems Engineer(1)
Data Engineer(1)
Grey Newell's avatar
Grey Newell
Atlanta, USA
Expert AWS consulting, AI solutions, and machine learning.
$100k+
Earned
1x
Hired
13
Followers
Expert AWS consulting, AI solutions, and machine learning.
Cover image for Schema-Driven Astro Starter Kit Development
Schema-Driven Astro Starter Kit Development
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22
Cover image for musegpt: Local LLMs in your Digital Audio Workstation!
musegpt: Local LLMs in your Digital Audio Workstation!
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20
Cover image for Event-Driven Resilience & Invoice Processing at Scale
Event-Driven Resilience & Invoice Processing at Scale
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Audio Engineer(1)
Data Engineer(1)