I build scalable backend systems, AI-powered applications, fintech platforms, and intelligent IoT solutions that solve real-world problems.
My experience spans backend architecture, distributed systems, financial service aggregation, AI-powered automation, cloud-native infrastructure, and embedded systems. I enjoy designing secure, reliable, and maintainable software that powers modern applications at scale.
- RESTful API Development
- FastAPI & Flask Applications
- Microservices Architecture
- Database Design & Optimisation
- Authentication & Authorisation
- High-Performance Backend Systems
- Distributed System Design
- LLM Integration (OpenAI, Claude, Gemini, OpenRouter)
- Agentic AI Applications
- Multi-Agent Systems & Workflow Automation
- AI-Powered Customer Support Platforms
- AI Search & Retrieval Systems (RAG)
- Tool-Using AI Agents
- Intelligent Process Automation
- Financial Service Aggregation Platforms
- Intelligent Provider Routing Systems
- Payment API Integration
- Transaction Processing
- Third-Party Service Integrations
- Secure Financial Backend Systems
- Enterprise Business Automation
- ESP32, ESP8266 & Raspberry Pi
- Embedded Systems Programming (C/C++)
- Sensor Integration
- Fingerprint Authentication Systems
- Health Monitoring & Alert Systems
- Real-Time Monitoring Platforms
- IoT + AI Integration
- Backend Engineering
- AI Infrastructure
- Agentic AI Systems
- Distributed Systems
- Cloud Infrastructure
- FinTech
- Intelligent Automation
- IoT & Health Technology
- Software Architecture
Python • JavaScript (Node.js) • Java • C • C++ • C#
FastAPI • Flask • REST APIs • Microservices • PostgreSQL • Redis
OpenAI • Claude • Gemini • OpenRouter • OpenClaw • RAG • Prompt Engineering
PostgreSQL • MySQL • MSSQL • MongoDB • Redis • Supabase
AWS • Docker • Kubernetes • Terraform • GitHub Actions • Jenkins • CI/CD
ESP32 • ESP8266 • Raspberry Pi • Embedded C/C++ • ESP-NOW
Git • Nginx • VS Code
A scalable backend platform that aggregates multiple third-party financial providers into a unified, reliable service.
An intelligent backend routing engine that automatically selects the best-performing third-party provider based on availability, performance, and business rules.
A multi-model AI customer support platform powered by OpenAI, Claude, and Gemini, featuring workflow automation and intelligent request orchestration.
Converted a traditional natural language search engine into an agentic AI-powered search platform with contextual reasoning, tool execution, and Retrieval-Augmented Generation (RAG).
Scalable FastAPI backend with AI-powered recommendations, Redis caching, secure payment-ready workflows, and AWS cloud deployment.
An embedded biometric attendance solution built with ESP8266, Embedded C/C++, fingerprint sensors, and Supabase for real-time attendance management.
Smart IoT platforms using ESP32, ESP8266, and Raspberry Pi for real-time monitoring, intelligent alerts, and cloud-based automation.
- Advanced Agentic AI Architectures
- AI Infrastructure Engineering
- Model Context Protocol (MCP)
- Distributed Systems
- Event-Driven Architectures
- Cloud-Native Applications
- FinTech Platform Engineering
📧 Email: znwajei@gmail.com
🐙 GitHub: https://github.com/Librazionpc
I'm always interested in collaborating on backend engineering, AI systems, fintech platforms, IoT solutions, and open-source projects.
Note: Many of the commercial systems I've contributed to are maintained in private repositories due to client and company confidentiality. This profile showcases selected public work and technical projects that reflect my engineering experience.