Tools and systems I've built.

A conversational AI companion that uses a Neo4j graph database to remember deep context — who you are, how you felt, and the causal chains behind your emotions. Unlike vanilla vector RAG, Markus extracts entities (people, emotions, topics) and links them with semantic relationships. Includes 16 integrated tools: Cognitive Behavioral Therapy exercises, SMART goal coaching, journaling, crisis intervention, and an interactive mind graph. Fully self-contained in Docker with zero SaaS dependencies.

• → Neo4j graph memory with entity extraction and causal relationship mapping.
• → 16 autonomous tools — CBT exercises, SMART goals, journaling, crisis intervention.
• → Streaming chat interface with LLM-driven function calling and mind graph visualisation.

A wrapper over Terraform and Packer that unifies and simplifies infrastructure lifecycle management. Flexible syntax and intuitive commands (plan, apply, build, destroy) ensure consistency across environments. Includes homer unlock to safely release Terraform state locks without leaving the terminal.

• → Single command interface for plan/apply/build/destroy across multiple environments.
• → Safe state-lock release with `homer unlock`.
• → Started as a 3-line alias, grew into a 400+ line CLI adopted internally.

Terraform codebase that provisions a complete high-availability AWS stack — VPC across multiple AZs, ALB in public subnets, EC2 Auto Scaling Group in private subnets with NAT Gateways, CloudWatch Agent for custom metrics, and Systems Manager for secure access without SSH. Built for production workloads that demand resilience.

• → Multi-AZ deployment with private subnets, NAT Gateways, and ALB for fault tolerance.
• → CloudWatch Agent collecting CPU, memory, and disk metrics at 60s intervals.
• → SSM Session Manager for secure, SSH-less instance access.

A full-stack web application built with Django and Bootstrap for managing tutoring courses and academic support services. Includes production deployment checks and SQLite-backed data persistence.